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Platycheirus 171
stulen 1100 m, On: Lom 6 July 1974, Tore
Nielsen leg. Allotype: female specimen with
the same data. Paratypes: specimens dated
Fiskevann, F0: Snr-Varanger 17 July 1969
(1 y), 1. & T. Nielsen leg.; Sverige, T. Lpm:
Abisko 25 June 1972 (1 $), 19 June 1973
(1 8, 4 99), 20 June 1973 (7 $ 8, 2 99, 22
June 1973 (3 $8, 2 99), 27 June 1973
(1 $, 1 y), Arne Fjellberg leg.; Norway,
Valdresflya, On: 0. Slidre 13 July 1973 (1 y)
and Spiterstulen, On: Lom 6 July 1974
(3 $ $, 3 99, Tore Nielsen leg.
Holotype, allotype and a number of paratypes
are deposited in the collection of the
author, and a number of paratypes in the
collections of Zoological Museum, University
of Bergen, and of A. Fjellberg.
COMPARISON WITH RELATED SPECIES
Platycheirus fjellbergi nov. sp. has been com-
Dared with two species it much resembles,
the larger P. ambiguz~s Fall., with which it
mi~ht have been confused. and P. hirtibes
~ai., which has been found'in a neighbouring
area of northern Finland and which may
show a similar distribution and occurrence
(Table 1).
PLA'TYCHEIRUS ANGUS'TI'TARSIS KAN.
This small but characteristic species was
described by Kanervo (1934) from material
collected in the Petsamo area of the western
part of Kola peninsula. It has also been
reported from Vajgatsj in northern Siberia
(Stackelberg 1970), and finds until now have
indicated a distribution on the tundra of the
far north.
A find of this species in Jotunheimen
(southern Norway) in 1973 was surprising,
and shows a quite far extension towards
south and west. The specimen, a male,
was caught in the upper part of the Leir-
Received 15 March 1974
dalen valley (61°36'N, 8O10'E) on 14 July.
The locality was a dry alpine slope at
1200 m a.s.1. between mountains rising up to
2000 m or more. The vegetation was dominated
by Cyfieraceae, Salix, Ranunculus acris,
and Aconitum sefitentrionale, and so the
locality has probably many of the same conditions
as those of the tundra.
The specimen has been found identical with
Finnish material, and shows the following
characters: face rather flat; tl slightly dilated
towards tip, front metatarsus scarcely dilated,
yellowish, but tl with a blackish stripe
laterally. Abdomen black, the spots brassy
black with slight greyish dusting, those on
tergite 2 indistinct (Fig. 2).
Superficially, P. angustitarsis looks like a
tiny P. albimanus Fall. or a dark, rapidflying
Melanostoma. In the field it may therefo-re
easily be overlooked or confuséd with
,he s,ec~es mentioned.
ACKNOWLEDGEMENTS
1 wish to express my warmest thanks to cand.
real. Arne Fjellberg, Bergen, who collected
the first series of specimens, and thus gave
proof of a new species. My thanks are also
due to Dr. Walter Hackman, University
Zoological Museum, Helsinki, for loan of
Platycheirus hirtifies Kan. and P. angustitarsis
Kan. for comparison.
REFERENCES
Kanervo E. 1934. Einige neue Syrphiden aus
Petsamo. Ann Soc. 2001.-Bot. Fenn. Uanamo.
14, 115-133.
Kanervo, E. 1938. Die Syrphidenfauna (Dipt.)
Sibiriens in vorlaufiger Zusammenstellung. Ann.
Ent. Fenn. 4, 145-170.
Stackelberg, A. A. 1970. Key for Determination
of Insects of European Part of the U.S.S.R., 5:
Syrphidae. Akad. Nauk., Leningrad.