338 A Monograph of Culicidae. 
Wings with the fork-cells about the same length, the first 
sub-marginal a little narrower, base of the second posterior a little 
nearer the base of the wing than that of the first sub-marginal, 
their stems nearly equal, about two-thirds the length of the 
cells; posterior cross-vein about half its length distant from 
the mid cross-vein. Halteres with white stem and fuscous 
knob. 
Length. —8 mm. 
Habitat. —Italy (Grassi and Noe). 
Observations. —Described from a male and female sent by 
Professor Grassi. This large gnat forms a very distinct species. 
Giles says : “ Noe’s new species C. Ficalbii is said to differ from 
C. annulatus only in the absence of a white ring on the distal 
third of the femora, but this hardly appears sufficient basis for 
the institution of a new species,” and he places it as a synonym 
of C. annulatus , not having evidently seen the species. 
Noe’s species as sent (named) to the Museum by Professor 
Grassi differs from C. annulatus in the following respects : the 
fork-cells of the 9 are much longer in proportion ; their stems 
are relatively shorter, and the posterior cross-vein more distant 
from the mid-cross vein than in Schrank’s species; in the £ 
there is no white median line to the second segment, so very 
characteristic of 0 . annulatus , the palpi are much more ochraceous, 
but above all is to be noticed the structural peculiarity in the 
mid tarsi, namely, the two teeth to the smaller claw. Neither 
£ nor 9 shows any definite wing spots, although the scales are 
a little closer at the bases of the fork-cells, so I include the 
species in the spotted-winged group as it is so near C. annulatus. 
Concerning this species, Picalbi, in his most recent paper,* 
says as follows :— 
“ Ali debolmente, ma evidentemente maccliiate per accumulo disqua- 
mette; tarsi albo annulati con anelli evidenti solo alia base degli articoli; 
ginocchii chiari; femori, a differenza del C. annulatus e del C. spathi- 
palpis , senza anello nel terzo distale. E una specie molto grossa, potendo 
raggiungere le dimensioni del C. annulatus (lunghezza, media da 10 a 
12 mm.). Fin ora fu trovata solamente a Macarese ed a Pato.” 
* Venti Spec. Zan. Ital. (1899), p. 176. 
