The occurrence of the solitary rrasp Pterochilus phaleratus Panz. in the Scandinavian countries

The occurrence of the solitary rrasp Pterochilus phaleratus Panz. in the Scandinavian countries

(Hy-. Eumenidae)

By Srnr,r,.Lu Enr-aNossoN

This solitary wasp is one of our rare species. As it is living in special bio- tope, only sandy ground, the prospect of finding Pterochilus is very limited.

During some warm and sunny days in the heginning of August 1967 I had the opportunity to make excursions in the surroundings of Old Skagen (Jut- land) . Not far from the hotel rvhere I was living I discovered a female of Pterochilus phcilercius. She flew on a little limited area inside a sunny ^dune-

hill which was partly overgrown with Hieracium umbellatum, Leontodon autumnalis, Galium uerum, Thllmus serpgllunt, single specimens of lasione montenq and Euphrcrsia sp. Fig. 1 shows a view of the locality. During three days I made extensive excursions but it was only on this locality I found this wasp. Further females were captured partly flying, partly sitting on the ground. Males were captured visiting the flowers of Thgmus ^alad Hieracium.

Except these captured individuals I observed a few other males and females.

Pterochilus lives in colonies, and I saw several females flying close above the ground, but in spite of intense search no nest was discovered. Nor did I observe any capture of booty. Jansson (1922 p. 26-28) made interesting observations of Pterochilus on a locality at Hornsjon situated in the northern part of the island of Oland. But unfortunately Jansson's observations were written in Swedish and thus passed unnoticed by foreign scientists. Bliithgen

(1961) only knows of Alfken's (1914) and Nielsen's (1932) observations.

Bltthgen (1961) does not know of any observations concerning parasitic animals living on Pterochilus phrilerrttus. Jansson (1922 p. 54) , ^howevet,

mentions that he found the chrysidid Spino/a unicolor at the same time and supposes that this species can be a parasite of Pterochilus phalerafus. ^On the locality at Old Skagen I captured tu'o specimens of Spinola unicolor.

My observations and Jansson's do indicate that Spfnola unicolor is a parasite

of Pterochilus phalerafrrs. Linsenmaier (1959 p. 86) mentions that other

sp,ecies of the genus Spinola are parasites of solitary wasps (Odgnerus).

Concernin6; the distribution of Ptercchilus phalerutus in the Scandinavian countries (Fig. Z) I refer to the list of localities. The localities along the coast of the Baltic Sea were received partly from Paul (1943), Miischler (1939), Wagner (1937), partly from Dr.-E. Kiinigsmann (Berlin). I have ^no localities from the Baltic countries of USSR, but as there are suitable grounds

Entomol.

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[173]

174 _STELI′ AN ERLANDSSON

Fig. 1. Locality of Pterochi- lus phaleratus Panz., OId Ska- gen (Jutland) 7/8 1967. Photo author.

inter alia along the coast, searching probably lvill be positive, especially as Pι θ rθ chfIIIs pFlarθ raι IIs has been captured in districts which earlier be―

longed to Finland.

For help ■ 7ith materials and information l express my hearty thanks to the fO1lovハ ng gentlemen viz. Demonstrator H. Andersson, Lund, Keeper G. Hallin, Stockholln, lllr. A. Levin, Lerunl, Dr. B. Pedersen, Copenhagen, Prof. Dr.A.Giordani‐ Soika, Venezia, NIr. E. Valkeila, Hallleenlinna, Dr.

Pekka Nuorteva,Helsinki,Ass.Antti Pekkarinen,Helsinki,and Dr.E.K6‐

nigslnann,Berlin.

Swedell

Sk.Kiseberg 15/718299A.G.Dahlbom?.IIstorp 12/7?C.G.Thomson.Espel・ 6d

C.G.Thomson(1874p.41).Rhd=Revingehed?/91869G.F.M011er(ThOmson

1874 p. 41). Raus 2/7 1908 9 0. Ringdahl. Angelh01ln 25/5 1916 6 0. Ringdahl Halsingborg lo/61916`,10/71917♀ 0.Rillgdahl.Å hus:Horna 3/819309D.Gau―

nitz. Falsterbo 20/61939 96,4/7 1939 6 S. Selander, Vitemё lla 21/6 1958 96, 29/81960♀ G.Hallin.― Bl.Torhamn,sandy gl'ound at the church 26/7 1957 96 S. Erlandsson.(Erlandsson 1964)。

Hall,Varberg: s.Of Apelviken ?/7 1907 96 Chr.Aurivillius(Aurivillius 1907).Skummes16v 2/7 19279,4/719379S.Selander.

-01. Borgholm (ThOlllSOn 1874 p. 41). Hornsion, Sandy ground on the eastern side of the lake, several ♀

`. Between LOttorp and Vedby, open sandy ground ? (JanSSOn 1922 p.26).Glё mininge 15/5 195990.Lundblad. Kast16sa N.of Bring 13/71938 6 D.Gaunitz.

Denmark

Seel Asserbo,Overdrev 5/61931 9C.le Dous.Hoiby:OdSherred 1/8 1935 6

0. Hё rring. Tibirke Bakker 18/6 1941 9 E. T. Nielsen?. ―一 Jutl. 01d Skagen 7/8 1967996,8/8-67996,9/8‐ 67 649.S.Erlandsson.Thy(=ThiStad)Norstved

at lsbierg 30/6 1961 9 Lyneberg_Birndel.Fjeritslev 25/7 1937♀ N.Bolvig.Hederup at Skive 23/6-29/6194239J.G.Ⅵ ^ア orm― Hansen.Funder 15/61914 ご Jensen_

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PTEROCHILUS PHALERATUS PANZ. IN THE SCANDINAVIAN COUNTRIES 175

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176 STELLAN ERLANDSSON Haarup. Randbё l Hede, Grindsted l1/6 1964 9 13/71943♀ J.G.ヽ Vorm― Hansen.一 ― _Bornholm.

S.Erlandsson (E■ landsson 1963).

R.H.E.,13/6-64 `R.Hg.stenbaek Sandvig 1958 9 6, Balka 1958 9 6

Finland

Kl.Sallni,Tulema 2 ex.A.ヽ Vesterlund.― 一 Ik.NIetsipirtti 5/8 1924A.Pulkkinen.

References

ALFKEN,J.D. 1914.Verzeichnis der Faltenwespen(VesPidac).Nordwestdelltschlands.Abh.

Natur.Ver.Bremen.Bd.23

AuRIVILLIUS,CHR.1907.Nagra iakttagelser 6fver insekter fran trakten af Varberg.Entomol.

Tds.Å rg.28.

BLも THGEN,P, 1961.I)ie Faltenwespenヽ litteleuropas.Abh.d.deut. Akad.d. Wissensch. zu Berlin.Klasse fir Chenlie,Geologie und Biologi.Jahrg. 1961.Nr.2.

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