LE OS eS 
SSeS eae 
THE MYCETOPHILIDA. 115 
They live upon fungi. There are possibly four or five British 
species. 
C. brevicornis, Staeg. = C. valida, Wik. 
This seems to be a rare species, and is described in Walker under 
the name of Va/ida. Recorded from Glanvilles-Wootton and the 
New Forest. 
The zmago is yellowish, stout, and compact. Lanceolate antennz 
shorter than thorax ; joints short. Wings grayish and stout. Veins 
tawny. Legs are stout, with longish spurs ; brown tarsi ; hind tibiz 
armed by very minute spines. ‘The second longitudinal vein ends at 
before two-thirds of length of wing. Sub-anal (fifth longitudinal 
vein) being forked and nearer base of wing than the fork of the 
sub-apical (fourth longitudinal vein). Length 2 lin. 
C. flaviceps, Staeg. 
Head yellowish. Thorax tawny or yellowish in front, also sides, 
and under surface. Antenne and palpi yellow. Wings having the 
fork of the fifth longitudinal vein much further than the fork of the 
fourth longitudinal vein from the base of wing. Legs tawny, short, 
and thick, long spurs ; tarsi dark ; posterior tibize with minute spines. 
Length 1 lin. 
GEeNnus.—Ajycetophila, Mg. 
This is an important genus, of which eleven species are recorded 
from Great Britain and twelve more are reputed; whilst Walker 
describes about fifty. : 
The characters of the genus are as follows: Body generally 
small, elongated, and hairy. The head is sessile and transversely 
broadened ; round in outline. Eyes are far apart and oval. Ocelli 
two in number. Proboscis short. The palpi 4-jointed (Meigen* 
only figures three joints; the first joint being very small, was 
evidently overlooked). The three joints are nearly equal. Antenne 
16-jointed; not more than half length of body; filiform to cylin- 
drical ; setaceous ; very thick in some species. The thorax very 
convex and generally oval; metathorax small and sloping down to 
level of the abdomen, which is of seven segments, and compressed, 
especially in the 2 ; in the ¢ it is more cylindrical. The wings 
are often spotted and of moderate length and breadth ; the second 
longitudinal is straight, and ends just before three-quarters of 
length; the third longitudinal vein emitting the sub- apical 
* * Sys. Besch. d. b. Eur. Zwei. Insecten,” t. 2, tab. 9, fig. 17 (1820). 
8—2 
