I 3 S BR I T I S H BLOOD-SUCKIXG FLIES
C. pallidicornis Kieffer
(Fig. 56, a~d)
CuUcoidespallidicornis Kieffer, 1919, Ann. .Mus. Xat. Hung., 17, 46.
C. distictus Kieffer, 1916, Arch. Hydrobiol. Supp., 2, 492.
C. dilciicus Kieffer, 1921, Bull, Soc. Hist. Xat. Moselle, 29, 55,
C. subfascipennis Goetghebuer, in part {nec Kieffer).
Tergite with the processes broader than in C. fascipennis, more or less
triangular instead of finger-like, so that the whole distal margin of the tergite
tends to appear bifid. Remaining parts much as in C. fascipennis, but parameres
somewhat narrower, especially towards the tips.
The specimens examined exhibit some variation in hypopvgial structure,
though all are quite similar externally. In a cotype of C. pallidicornis in thé
British Museum (fig. 56, b) the parameres are definitely shorter than in six
British males (from different localities^ of which mounts were made ; some of
the latter agree with the cotype in the shape of the tergite (fig. 56, but one
or two show an approach to the form of ¿7. fascipennis (fig. 56, c). If the
British form is distinct from C. pallidicornis it may be C. dileucus Kieif. A
specimen received from Dr. Goetghebuer as C. subfascipenms Kieff. was identical
examples ; I do not think this determination can be correct as
Kieffer described C. siibfascipennis from a female with striped thorax.
C. odiatus Austen
(Fig. 56, h)
Culicoides odiatus Austen, 1921, Bull. Ent. Res., 12. 112.
? C. pallidicor?iis Kieffer var. hruneoscutellatus Géza Zilahi, 1934, Bull. Soc. Ent. Bulg. 8, 155.
This was described from two females from Palestine, and no male has since
been obtained in that country. A single British male which I refer doubtfully
to this species has a hypopygium very much as in C. pallidicornis, but with
some differences which may be significant, the most notable of which is that
the style is swollen and hairy on much more than the basal half.
C. tentorius Austen
(Fig. 56, g)
Cidicoides tentorius Xmttn, 1921, Bull. Ent. Res., 12, no.
Hypopygium very like that of C. pallidicornis, but differing definitely in
the long, slender ventral root of the coxite, and in having the parameres more
abruptly narrowed at the tips. The structure is almost exactly like that
figured by Root and Hoffman for C. biguttatus Coq., except that the American
species is shown as having the sternal membrane much more densely spicular.
C. te7itorius has been recorded only from Palestine. Externally the male is
very similar to C. pallidicornis, having scantily haired wings as in that species,
with no hairs in the cubital fork. The female seems rather well distinguished
from C. pallidicor7tis by the more distinct white spots on the wing, and by the
paler (uniformly light reddish-brown) thorax.
G E N I T A L I A OF CULICOIDES 139
C. cubitalis sp. n. (p. 40)
(Fig. 57, i. d)
Culicoides subfasciipennis var. analis, Kieffer, 1925, Faune de France, Ceratopogoninae, 81.
Tergite with the processes rather thick but rather long and divergent,
margin of tergite between them nearly straight, with small median notch.
Sternite with the usual wide emargination, membrane bare. Coxite with
ventral root rather long, simple. Style nearly straight, slightly enlarged at tip.
Aedeagus broad, antero-ventral margin well defined. Parameres long, with
foot-shaped bases and hair-like curled tips.
In the form of the tergite and parameres and the bare sternal membrane
the hypopygium of this species differs widely from those of the C. fascipennis
FIG. 57.—Hj-popygia of Culicoides, ventral view : a, b, truncorum (a, Snailwell; b, Brockenhurst)
c, d. cubitalis (c, Letchworth ; d, Arran); e, neglectus ? (Belgium).
group, but it shows rather a close resemblance to C. odibilis, a species to which
it bears little resemblance in coloration. The American C. simulans Root and
Hoffman is also similar in hypopygial structure, and intermediate in wingmarkings
between C. cubitalis and C. odibilis.
Kieffer's description of a^talis agrees, so far as it goes, with our material,
but I do not think analis can be a variety of subfascipennis, the original
description of which indicates a very different insect with striped thorax.
The name analis is preoccupied in Culicoides by C. a7ialis Santos Abreu, 1921.
C. truncorum sp. n. (p. 41)
(Fig. 57, a, b)
Tergite broadly truncate apically, processes short and almost parallel,
median notch slight. Sternite with moderate emargination, membrane bare'.
Coxite rather long and narrow ; ventral root foot-shaped, but the " heel " not
very prominent. Style somewhat curved at tip, which is not swollen. Aedeagus
with very slender arch and narrow apex, ventral surface not sclerotised.
Parameres long and slender, without sharp bend near base, the bent tips long
and slender and provided with several fine barbs.
The hypopygium of this species bears some resemblance to that of C.
albicans, but is quite different from any species of the C. fascipennis group.