mammals from the Tilrnasjii and Amrnarnils areas in

mammals from the Tilrnasjii and Amrnarnils areas in

Swedish Lapland

By ANonns Eor.Bn

l. Introduction

very little has been published on the parasitic mites of the small mam- mals of Scandinavia. During the last seven years much material has been collected by working groups from the Department of Animal Ecology, Uni- versity of Lund, as a parf of the department's research on small mammals and their ectoparasites.

The present paper deals with material collected in the Tiirnasjii ^and

Ammarnhs areai, Lycksele lappmark, in Swedish Lapland during the ^years 1968-1966. The coilectors were: A. Pettersson, ^C. Riideberg and L. II. Wiss

(15/6-30/6 1963); H. Andersson, P. H. Enckell and B. Hylt6n-Cavallius

itzlt-rctt ^{1963); G. & P.} Brinck, L. Cederholm and I. Rudeheck (4ls-fi19

igos) ; ^{H. E. Lindskog} (1616-1017 1963, 1216-917 and 6ls-rgls ^{1964) ;}

S. Ulfstrand (4/7-11181963, 15/5-2315 lS64); P. Brinck and L. cederholm (28/6-80/6 tbO+); L. Hansson (1216-1616 ^1964, 1716-2716 1965, 1516-2016 1e66).

2. Material antl methods

1,651 small mammals were collected. Ectoparasitic mites were found ^on 518 host animals, 49 of which were dead when removed from the traps.

2,688 specimens of parasitic mites were collected from the fur of the mam- mals. 2,379 were from live mammal ^specimens.

The mammals were collected in net cage traps (Hansson 1967), ^placed

in plastic bags, killed with ether and injected with 10 ml- formalin-alcohol (1 part 4 0/o formalin and 1 part ^{80 0/o} ethanol) . About ³⁰ ml formalin-alcohol rvas poured in each bag.

TIie ectoparasites were removed in the laboratory and prepared for micro- scopic examination in Swan's medium, Kramar's modification ^(Hrbacek

et al. 1954).

Most of the material was determined by Dr. Milan Mrciak, Zoological Institute, Bratislava during his stay at the University of Lund.

Entomol. ^Ts. Atg. 89. H. 3 - 4' ¹ⁱ⁶⁸

[26e]

270 ANDERS EDLER

3. LOcalities

The host lnaterial、 vas collected in the fo1louring 10calities.

a.At River Vindelalven,Dalovardo waktstuga.Forest with Bθ ι

“

Jα ρ

“

b`sCθ llS SSp.

ι Orι

“

ο sa and some JIInipθ ras and Sα

rピ

“

bet、 ″ een two mOuntains.Several small inires and small streams.Altitude ca.640m.

b.At River Vindelilven,Vindelkrokens sommarviste.Similar to Dalovardo.Altitude

ca.650m.

c.Forsavanstugan,Lake Tarnasjё n.Bθ ι

“

Iα forest with rich undergrO、 ァ th of herbs and grass.Altitude ca.600m.

d.Tarnasj6stugan,Lake Tarnasiё n.Bθ f“ ra forest on hill near the lake,surrounding grassy meadows. Behind the hill, marshy area、 vith thick Sari“ scrub. Altitude ca.

600m.

e.At Lake Storvindeln,Valinis.Old PIcι a forest.Stony and moss― covered grOund.

Altitude ca.340m.

f.At Karsbacken stream. Rather dry, open Pゴ nus forest with boulders at places, elsewhere lnoist ineadoM′ ‐ type lnixed forest.Altitude 450 1n.

g.5 knlヽ ヽ ア Amlnarnis village.old PIc`α forest、 vith scattered Bθ ォ ara.NIoss‐ covered grOund.Altitude ca.450m.

h. 5.5 km ヽヽ ア Anllnarnis village. cultivated ground around farnl, close to a

PIcθ α fOrest.Altitude ca.4751n.

i.6 kmヽ ヽ ア Anlmarnas village. ル100r Bθ rura fOrest with JIInfρ

`r“

S and Vacclnfam myrffrras.Altitude ca.530m.

j. Kraipe, 13 km SSE Anlmarnis village. Forest with Bθ fltra pab`sc`ns ssp. ι ο r―

ι

“

ο sα .Altitude ca,7501n.

k.Kraipe, 13 km SSE AInmarnis village.open forest with B`ι

“

Iα ρ

“

b`scans ssp.

ι ο rrasα ,Junビ ρθ ras and lichens.Altitude ca.7801n.

1.At Kuoltatjakko mountain,15 km SSE Ammarnas village.Moor with EttPθ tram and Bθ r“ ra nana.In some places stretches of Carer and Sarf".Altitude ca.8201n.

m.At Taratjakko mountain,9 km NNE Ammarnis宙 1lage.M00r with Emp`fr“ m

and B`IIIIa rtana.Altitude ca.8001n.

n.At Lakc Tjultnsk.Damp, meadow‐ type m破 ed forest near small stream.

Altitude 716 m.

o.Tjultrisk village.Thick forestゃ _{vith B`ォ} ura and some scattered Pir2● s and PIcθ α

^.

Close tO cultivated ineado、 /1and.Altitude ca.560m.

p. At Kaissats mountain. Lush, damp area 、 vith tall herbaceous vegetation and thick Sarピ ″ scrub.In some places Cα r`“ and Bθ rara nana.Altitude ca,700m.

q. Djupfors village. Scattored, small Bθ _f“ Jα ρ

“

bθ scθ ns ssp. fο rf“ ο sa and Bθ :“ Iα

nanα and Ettρ θ fr“ m besides.Altitude ca。 750m.

r.At Riverヽ ^ア indelan.Open area with Sα

rピ

“ ,JunIPθ ras and bushes of Bθ fIIIra.often stony and lnoss― cOVered ground.Altitude ca.390m.

4. Small mammal material

The 1,651 specimens collected represented 8 species (see table 1). l,1BJ specimens had no gamasid mites.

Entomol. Ts.,lrg. 89, H. 3 - ^{4, 1968}

∽ ｏ 一 電 口

︻

〓 “︼

， ３

〓 ｏ

︺

］ ｏ

∽ ● ２ に も ｏ 鮎 づ ∽

“ 。

∩ 聖 ∽ 一日

〓 〓

，

∽ 口 ｏ 口

〓 ｏ ｏ 。

Σ ∽

11

Localities

i j k l ^{p q}

Species

Neomgs lodiens Penn. ....

Sorex araneus L. . ... .. 5 30 4 16 Clcthrionomgs glareolus 3 2 46 lO7 38 ²⁹⁸

Schreb.

C. rulocanus Sundevall . ..

Microtus agrestis L. ^. .. .. .

Lemmus lentmus L. ^. .. . . .

Xlustela minutq Ponrel . .. .

一 ４ Ｈ 一 １０ ７３ 一

３ ２８ 一

５ ６２

・６ 一 Ｈ

一 ７ ００

０ ０ ０

・３

一   一 ４ ５   一 ７ ７   一 一

２

一

︲２

・６

一

︲２ ２ ２ ２７ ２３ ３０ ７   一 ９

一 ３

３

一   一   一 １

． ２２

２ １

一 ３ ４

一   一   一

． ５９

１ １

一 １。

２９ ６ １

一

― ― 一 - 1 - _一 - 1 26 3 1 -- 60 2 -― ― - 178 61 12 26 -- 157 8 -- 2 1061

一 ■

・６

・７ １

一 一 一 ４９ ４ １ 一 ５ ． ８

Erxleben

Σ 14 7 97 199 49 350 113 137 76 39 168 31 55 2 232 19 13 50 1651 Table 2.Tflθ α♭ andancθ ο′ ^{frla ntゴ}

`θ

spθ θ ご θ s on fFlθ Jο ε α

rビ

ι ι θ s

l J n o p q Σ

Eagα 122aSaS rambarri...・ ・・・・・・・・・・・

E"α maslts sp.… … .… … … .… … …・… … …

Pο acffο cifrtts nacrο prtο rビ ...・ ・・・・・・・・・

CtJrfο ra`rα pS ntIIcrο nα fEIs...・ _{…・・・・}

C.minor ...・ ・・・・・・・・・・・・・・・・・ ・・・

::i拓静

^rgΨ T11::III::1≡

〕れ

f競

寛::1競 ^is・

:::IIIII:可 =

1:F織7:需

ギ∵ 警 .I::III!!I::可

= 適デザ驚

^Iギ I:ll::空

fll.IIIII:

15 1 154 2

― - 1 78 142 1

-一 ―― ― - 3 -―

一 一 一 一 一

一 ６

一 ４

一 一 一

一 １０

１ １８ １

・７２ ９８

一 一 ４

一 ３ ５

．

一 １。

１９ ４４

国 ０ ↓ 〇 ﹁ ＞ ” ＞ ∽ Ｈ 弓 ︻ ０ ぞ 目 弓 岡 ∽ ︵ ＞ ０ ＞ ” Ｈ Ｚ ＞ ¨  り ＞ ” ＞ ∽ Ｈ 弓 ︼ ﹃ Ｏ ” 〓 閣 ∽ ︶                Ｎ 、 ぃ

︲２ ３０

． ２７

１ ７４ ２ ８４８ ５３３ ２６４ ２

︲７７

︲３０

・６３ ３７９ ９ ８６ 一

一 一 一 一 ２

一

・７８ ３８２ ８３

一

・９

・８ ６ ６

一 ３２ ２

２

一 一 一 １

一 Ｈ ２

一 一 １ ２ ２ ４

一 一 １ ２

一 ２

一 ３

一 ２６

１ ２

一

・３ ６

・０ ６ ５

一 １

︲３

一 ６

一

︲２

一

︲２

一 ９

一 ２８ ２︲

８ ２ ．

一 一 一

１

一 ２

一 ２

一 ７

一 ２

一 ２２

６

・６ １ ５

一 １

一

・３

一 ６︲

３６

・４

一

・０ ２９ ２９

5 -一 _一 - 2 - _― 1 - _{一 一 ― ― ―}

1-一

―

― ― 一

2 -一

― ― ― _{― 一} 一

3 -―

一 - 2 - 1 - 1 - ^{― ―} ― _{一 ―} 22 -- 128 23 2 5 -―

4 -- 3 2 3 1 1 15 -- 4 18 1 3 -―

一 一

一 - 1 - 5 -- 3 1 8 -― ― ――

10 -- 2 -- 1 -― ――

5 1 3 -- 7 -― ――

47 16 24 2 11 - ――

― _一

― - 1 -

4 -一 _{― ― ― ― 一} 一 _一

12 8

6 II. ^lalricus

1 533 448 11 211 66 131 77 27 124 18 167 46 39 9 2 726

a b c d e f

272 ANDERS EDLER

5。 Acarine rnaterial

The 2,688 specinlells represented 17 species of mites. 20 specimens were protonymphs;252 deutonymphs;314 males;and 2,102 fen■ ales. Their occurrence in the localities is sho、 vn in table 2 and on the hosts in tables 3 and 4.All the species except″ aθ r210θ α maSas nビ di are new to Sweden(cf.

Trigirdh 1910 andヽ Vilhnann 1943).

The species are listed below, arranged accOrding tO Bregetova's (1956)

systelll.

Falnily Parasう ι ^jJα ο E口 gcIIr22rISas rθ nl♭ θ ^rι :Berlese,1912

Deutonymphs frolll Crθ オ hrピ 。 nο inIJS glarθ οど us,」 trビ crο ι

“

s agrθ sι ご s and fИ uslθ lα

υ arrク α rピ s.

Ettgamas“ s rθ rnbθ rff is the most colllllnOn Species Of the fall■ ily in Central Europe.It is cornlnonly found as deutonymphs on small malllinals in Central EurOpe, in the Balkan Peninsula ぃ肛rciak 1959 a一 一 b, NIrciak and TOvOrnik 1966)and in Finland(ヽ lrCiak and Brander 1965).VitZthun■ (1929)observed it in nests of small mammals,Bregetova(1956)in neStS Of moles and Nordberg

(1936)in neStS Of birds.π Villinann (1954)recorded it as a free― living species.

E“ ganlasIIs sp.

Deutonymphs from Crθ fflrピ 。 nor21ys grarθ olas and ifピ crο IIIs agrθ stピ s.

Pο θ ciJοchfrIIs rtθ crο ρ ^{flο rご} VitZthun■ ,1930

0f this species one deutonymph was found on Crθ fhrご 。nontys grar`。 Jas.It is norl■ any a parasite of beetles(Gθ ο frIIρ θ s and Arθ crο ρ rloras)and iS Only occasionally found on sma11 lnalllinals,and then I■ ostly as deutonymphs.In Finland it was recorded by RIrciak (1964)from CFlaradrピ as apricarfIIs L.

and by plrciak and Brander(1965)from Rα ι ι 口 s nο rυ

`θ

ご cこ IS Berkenhout.

Falnily∠ scα う dα e

Cyrfο Jrlθ lα ρ ^{s rllIICrο} naras G.&R.Canestrini,1881

Deutonymphs and One prOlonymph froln CIθ lhrご ο nο mys grarθ ο Jus and

]′ ピ crο ι as agrθ sι is.

ヽヽ rillinann(1941)observed it as a free― living species in YugOslavia.Accord―

ing tO Mrciak and Brander(1965)it ocCasiOnally occurs on small mammals and in their nests,mostly as deutonymphs.

Cyrι οご α

`′ αρ ^{s lnご nο rヽ} Villmann,1952

0ne deutonymph from]′ ピ crο ォ as agrθ sffs. The species is very rare in the fur of small mammals(MrCiak 1959 b).

Falllily Lα θ ^Jα pι jJα θ

ELrJα θ rα ps sfab“『 arfs C.L.Koch,1836

Adult females from Sο rθ χ arancrrs,CJθ fhrionο r21ys 9Jarθ ο rus,C.r“ ノ ο Canas,

21ffcrο l口 s agrθ sfピ s and Lθ almasJ`llll12こ IS.

E"ι 07710J Ts.ノ ″ ク ^8θ ″ 3-4,196∂

Table 3. The ebundance of the mite species on theit hosts

Σ

貧 Ｈ Ｚ ︶ 調 ０ 日 、 口 ０ 一● ∩ ｏ 貧 Ｚ ︶ 〓 。 口

︼ 餞 ﹄ ︵ 目 Ｏ ｏ ︼ ｄ ９

・¨ ● ヽ ０ ヽ 日 も

ヽ   ヽ ．

︻ も

︺ 、

■ 日

、 ヽ ．

﹁

∽ ヨ 蛹 Ｅ Ｓ

︼

↓

∽ ︺ ” ∽ ｏ 、 ぃ も ．Ｓ ︻

∽ ヽ 営 Ｓ ● ０ ヽ ヽ ヽ ．り

∽ 、 ﹂ ｏ 、 ヽ も ヽ ぃ ．り

∽ ヽ ヽ 目 ０ ヽ も ．∽

Eugamasus remberti,,.

Eugamasus *p. ...

Poecilochirus necrophori . C g rtolaelap s mucr onutus C. minor

Eulaelaps sfabularis . ....

Laelaps lemmi .

L. hilaris

L. clethrionomydis ...

Hgperlaelups arunlis ....

,llyongssus ingricus ...

Haemogamasus nidi . . .. .

H. nitlilormis H. ambulans

I/irsfionyssus isabellinus.

H. musculi

４

一  一  一  一  一  一  一 一  一  一  一   一 一 

一 ４ 一 一

一 ２

一 ２ ２ ８ １ ２

一 ４ １

・３

一

〇４ 三

一 ４

一

・８

一 ４６ ７ ２８ １

︲７

一 ４〇

一 ８６ 一 一 一 一

一 １

一 一

三

１   一

２９ ２４ １ ４６ ２８ ５９ ０４ ６

４ ８ Ｈ ２ 一 ７

︲ ２

・ ２ ５ ２ 一

５。

２６

一 ９３ ８ ． ８５ ９９ ３

１

一 １ １ ２ ２ １

10 -― _――

7 - _― 5-―

3 17 3

︲ ２ ３ ０

． ２ ７

１ ７

． ２ ８

． ８ 翻 ２ ６ ４

２

・ ７ ７

︲ ３ ０

・ ６ ３ ３ ７ ９ ９ ３ ６

︲ ２ ３ ０

． ２ ６

１ 一 ４ 一 ９

・ ６

”

︲ 一 ３ １ ４ ７ ９ 一 一 一 一 一 １

一 一 一 ５

３ ５ 一 ２

一 １ ３ 一 一 一 一 一 一 一 一 ６ 一 ６ ９ ．

” 一 ９ ２ ０ ２ ６

・ ６ 一 １ 一 一 一 一 ７ 一 ４

２ ７２ ８ ４ ２ ３

・ ８ ４ ２

・ ５ ３

・ ０ ９

︲ ３ ２ ２ ５ ．

９ ３ ５

H. tatricus 6 16 6 -―

Σ 9 616 638 1328 62 28 7 2102 311 20 252

It is known fronl many parts of the world fronl various host aninlals (Strandtmann andヽ ^{ヽ γ} harton 1958)and iS fOund in nests of most small mam―

mals in Europe(NIrciak 1959 b). Trigirdh (1931)found it in a hay‐ ^{loft at} the Faeroes. It easily adapts itself to various ecological conditions and to

various host anilnals. It can attack man and nlay be a vector of diSeases (MrCiak 1958 b).

Lα θ lα Ps lθ rllmi Grube,1851

Two felnales from Lθ lltrllus lθ rllalus.

Bregetova(1956)recordS Lθ rlllnIIs Obθ rlsfs Brants.as a host. ^■ lrciak and Brander(1965)found it On L.Jθ nllllas in Finland.

Laθ lα Ps flビ Iarfs C.L.Koch,1836

This was the most conllnon lllite in the material froln the An■ ^lllarnis and Tttrnasjё areas.It、vas found on Crθ frlrionornys grarθ ο ras,c.r口 ′ο ^{carlこ IS・}

lイ icrο ι us agrθ sfis,Lθ nll■ LIs renlr21as and Masfθ ra nlinIIι

``.The lnost frequently―

attacked hostヽwas M.agreslis,on which 83.00/o of the ll■ ites of this species

were found.A similar dominance(77.30/o)on/1f・ ^{α grθ} sfis was found by

ヽ lrciak (1959a)in the mOuntains of Krkonose (Riesengebirge)in CZecho―

slovakia.「 Fhe coll■ Inon hosts are species of 1/ficrο ^ι IIs and Pilyr211JS. The occurrence of L.IliJaris on other small lnalllinals may be a result of direct contact with the main hosts in overlapping ranges of the mammals(Mrciak 1959b).

E,lr。

222ο

′rs′

f′

ク 8, 〃 3-`,プ

'68

274 ANDERS EDLER

Laelaps clethrionomydfs Lange, 1955

'fhe species was found on Sorer eraneus, Clethrionomgs glareolus, C. ruf o- cenus, llicrotus agrestis, Lemmus lemmus and, Mustela ntinutcr. It was most common on C. rufocanus, 84.1 ^0/0. Only 9.4 ^0/o were collected from C.

glareolus.

'Ihis _{mite is} of interest because of its adaption to particular hosts in dif- ferent zoogeographical areas. In czechoslovakia and Bulgaria the main host is Clethrionoru.gs glareolus (Mrciak 1959 a-b).

Hg perlaelaps arualis Zachvatkin, 1948

The species was found on clethrionomas glareolus, c. rulocanus, ilIicrotus agrestis and Lemmus lemmus. 84.8 0/o of the specimens were found on M. ogrestis.

According to Mrciak and Brander (1965) the main host in central Europe is Microtus aruolis Pallas, but this species does not occur in North Finland

or Scandinavia except for Jutland. Mrciak and Brander (1g65) found one specimen on XI. agresfis in Finland.

Mg ong ssus inglricus Bregetova, 1g56

Two females were found, one on sorer araneus and one on Microtus agrestis.

The mite has been found on many different hosts. It is rather rare on small mammals (Mrciak 1958a,c, Mrciak and rovornik lgbg), but more common in their nests (Willmann 1952).

Family laθ

“

Ogattα sjJα θ

〃αθ mο θαmasaS nビ ごご ^L〔 ichael,1892

滞 鷲 稀]孵^{盟脇 』Ш 肥 ダ}:wt榔鳳 機

澪 牌聯書 ￡ 群飢諦 _I柵 t a lenllning's nest in the Sarek area in 鳳黒い

^CttWb鵬

nymous前

h〃 α θ ^mο gam“ 覆

^s17idimcI「

知 ^1は 96o,E.α mわ ゴ ^ansお

syn0

■ ^occu∬ On many hOtts andお knoF∴

眠

^i槻

ざ ^lltti∬ ∴ ^rrib認 鵠

the USA and Greenland.It occasional certain diseases(Mrciak 1959 b).

″

“ ^mο

gα r2rttSガ ごご ノ ο rnlビ s BregetOva,1955

The species was found On Sο rθ χ ararlθ as, Crθ ι Jlrforlο lltys grarθ oras, c.

rイ ο Cantts,″ icrOι tts agrθ sι is and ιθ mr21口 S Iθ mpl“ ∫ .62.30/O of the specimens were found on C.grarθ oJtts.

戯継蠅鮮ゼ警り 群

^i撫

聯繹 潔 ^i膳 磯

₁

at 1700 m in the mountains of Rila.]

an area at altitudes bet■ _{veen ca。} 400 and 700 m.

E″ ι ο″

2ο

` rs ノ″ ク 8θ ″ 3_`,ゴ θ 68

Table 4. The lrequencg of the mite ^species on the small mammals inuestigated

﹄ ０ ０ 日 づ 目 ︻ “ 一 ｏ い り ヽ ■ ０ い ヽ ヽ ヽ ．ヽ ヽ ｏ ︺ 、 目 ■ に 。ヽ ヽ

り ヽ

” 墨 ミ ξ

． 哺

∽ ヽ ” ● ヽ 、 ぃ ０ ．ヽ ヽ

● ヽ 目 も い ０ ヽ 日 ヽ ．０

● 、 ﹂ ｏ ｏ ヽ ｏ ヽ ぃ 。い

● ヨ ０ 目 も ヽ も ．∽

Eugamasus remberti Eugamasus sp. ,...

Poecilochirus necrophori Cgrtolaelaps ntucronatus C. minor

Eulaelaps sfabularis ....

L. hiι aris .… _{… …}

L, clethrionomydis . .

Hgperlaelaps arualis .

Mgongssus ingricus Haemogamasus nidi

H. nidilormis .. . .

H. ambulans

14.8 14.8 7.4 -- 100.0 -―

- 8.3 - - 6.7 -

５８

． ３ ９３

． ３ ００

・ ０ ６３

． ０

一

一 一 一 一

一 ”

０ ・ ０ ０ ・ ９ ０ ・ ８ Ｈ 一 ５ ． ６ ５ ． ４ ３ ． ︲

1.4

0.2

50.0 0.6 623

52.1

33.3

54.1 24.3 176 10.1 5.4 83.0 9.4 84.1 5.4 9.8 4.2 84.8

-― _― - 50.0 52.5 15.3 26.0 21.5 36.2 26.1 13.7 53.8 33.3 -- 66.7 -- 22.2 16.7

︲２ ３。

︲ ２７ １ ７４ ２ ４８ ３３ ６４ ２ ７７ ３。

６３ ７９ ９ ３６ 一

三

一 一 一 一 ０

・ ５ ０

・ ２

一 一 一 一 一

Ilirsfionyssus isabellinus

H. musculi

H. tatricus

Haemogamesus embulans Thorell , ¹⁸⁷²

The species rvas found on Sorer ereneus, Clethrionomgs glareolus, C. rufocanus, Microtus agrestis ar,d Lemmus lemmus. ^{52.1 olo} of the speci- mens were found on C. glarcolus and 36.2 ^olo on M. agrestis.

This mite is known from Asia, Europe, Greenland and North America (Strandtmann and Wharton 1958).

Family Liponyssid,ae .lllirsfionyss us isabellinus Oudemans, ^{19 13}

The species was found on Sorer araneus, Clethrionomgs glareolus, ^C..

ruf ocanis, Microtus agrestis, Lemmus lemmus and Il[ustela uulgaris. 53.8 ^0/o of the mites were found oD M. agresfis, 26.1 ^olo on C.glareolus and ^{13.7 0/o} on C. rufocanus.

This mite is recorded from many host species and may also be found in their nests. It is very important in natural foci of tularemia (Mrciak 1959b).

.lllirstionyssus musculi Johnston, 1894

The species was found on ^{Sorer erutneu$,} Clethrionomgs glareolus and Microtus agrestis.It is a parasite of Muridae and only rarely occurs on Micro- tids (Mrciak and Brander 1965).

f,Iirsfionyss us tatricus Mrciak, 1958

The species was found on Clethrionomys tutocanus, Microtus Qgrestis, Lemmus lemmus and. Mustela minuta.

Entomol, Ts. ,|rs.89. H, 3 - ^{4, 1968}

・

・ ５

︲

・ ２ ０

・ ３

一 一

0.8 4.5 0.8

44.4 16.7 -―

276 ANDERS EDLER

The species was previously known from three countries, viz. Czecho- slovakia, Yugoslavia and Bulgaria. There the main host is l'licrotus niualfs Martins (Mrciak 1959b) which does not occur in Scandinavia. H. tatricus was found only in mountain districts.

6. Acknowledgements

This work was carried out at the Department of Animal Ecology, University of Lund, rvhere the material is preserved. The Work lvas supported by grants from

"Nordiskt Kollegium f<ir terrester ekologi" and the Research Institute of National Defence.

To Professor Per Brinck, head of the department, and to Dr. Milan Mrciak, docent at the Zoological Institute in Bratislava, I am greatly indebted for valuable advice and criticism. During 1967, I ^{.!r'as given the} opportunity of working for two months

at Dr. Mrciak's institute in Bratislava by grants from the Natural Resource Com- mittee respectively the Ecology Committee of the Srvedish Natural Science Research Council and the Royal Swedish Academy of Engineering Sciences. For this help I am very grateful.

7. Summary

2,688 specimens of gamasid mites from small mammals collected in Srvedish Lap- land (Tdrnasjii and Ammarnls aleas) represented 17 species, viz. Eugamctsus rem- berti, Eugamdsus sp., Poccilochirus necrophori, Cgrtolaelaps mucronatus, C. minor, Eulaelaps stabularis, Laelaps lemmi, L. hilaris, L. clethrionomgdis, Hgperlaelaps arurilis, Myonyssus ingricus, Haenrcgama.sus nidi, H. nidiformis, H. ambulans, Flirstionyssus isoDellinus, H. musculi and II. tatricus. Of this species only Haemo- gama$us nidi has previously been recorded from S'n'eden.

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