NOTULAE ENTOMOLOGICAE - Helda

\v. HACKMAN, ON THE DIPTEROUS FAUNA OF RODENT I5URROWS 127
arctic species clearly distinct from C. glacialis and represented in the Kevo material
by 36 specimens. For this species I use the name Crumomyia rufoanniilata
L)uda. The biology of the species is not known, but it can be assumed to be coprophagous
like the other members of the genus. It occurred in all three types of
burrows in Kevo. Limosina claviventris Strobl is here a fairly dominant and
constant component of the samples. It is known to occur in various terricolous
habitats and is able to undergo its whole life cycle in rodent burrows (see further
HACKMAN op.cit. p. 43). L. schmitzi Duda has been repeatedly recorded from
rodent burrows but also taken in other terricolous habitats. It can be observed
that Limosina ialparum Rich., the single eucoenic dipterous species in the material
collected from Smäholmen, Bonäs and Kvitskog, is entirely absent from
the Kevo samples.
Scatophagidae. The single species, Scatophaga furcata, present in one sample
can be regarded as an occasional guest.
Muscidae. The Muscidae are represented almost exclusively by females and
identification of the species is difficult. At most the Fannia sp. and one of the
Phaonia spp. might belong to the burrow community. The others are probably
occasional guests.
5. List of species
In the list of species the following abbreviations are used. The phenological
(lata are given as follows: Roman numerals signify the month, which is divided
into 7—8 day periods of sampling, indicated by the immediately following luimhers
(1, 2, 3 or 4). The number of specimens for each period are given in brackets.
The abbreviations for burrow type and trap type are the same as are used in
table 2. For each type of bixrrow the number of specimens is mentioned and in
how many traps the species has been found. For example: Rb 2 1 $/2 f,
means that in burrows of type 2 (root burrows, sun-exposed) 2 males and one
female have been collected in 2 funnel traps and 1 male in a Barber trap. lUe
and l)ti indicate the baited traps as in table 2. To = tychocoenic, Xc xenocoenic
(sensu HACKMAN 1963).
Trichoceridae
Trichocera spp. (probably two species). VI:3 (IcJ 36 ÇÇ), VI:4 (2 ?$), VII: 1
(2 $$), VII:2 (1 $), VII:3 (2 $?), VIIl:! (1 $). Rb 15 $?/6 f, 5 $?/l b, Sb 7 $?/4 b,
Lb 5 $$/2 f, 5 $$/1 b. Bti 2 Bte 1 ^ 5 To?
Psychodidae
Unidentified species, 1 Ç, Bte.
Chironomidae
Orthocladinae sp. VI:3 (1 ?), VI:4 (2 ??), VII:2 (1 $). Rb 2 $$/2 f, vSb 1 Ç/b,
I.b 1 $/b. Xc?
Orthocladinae sp. VI:3 (5 ?$), VI:4 (7 ?9). VII:t (8 ?$). Rb 8 $$/3 f. Lb 10 $$/2 b,
1 $/f. Bte 1 Xc?
Simuliidae
Simulium sp. VI 1:4 (3 $$). VI 11:1 (1 Ç). Rb 4 ??/2 f. Xc.