FAM. MYCETOPHILID^ 
3i 
(the anterior branch of the radial sector) is distinct, short, usually nearly transverse, and bounding 
■distally the small cell Rj . The ocelli either two or three in number, and remote from the eye margin 
■except in the genus Eiidicrana. The male genitalia are diverse in structure, usually rather small and 
inconspicuous (PI. 7, Fig. 1-4). 
TABLE OF GENERA 
a. Cuhitiis not forked. 
b. Tlie ci'ossvein is longer ihan its distance from the fork of the 
media; sithcosta prolonged beyond the end of the small cell 
(PI. 3, Fig. 23) I. Genus Monoclona, Mik. 
bb. Length of the cross-vein less than its distance from the fork 
of the media; siihcosta ending at or before the small cell 
(PI. 3, Fig. 24) 2. Genus Parvicellula, Marshall. 
.aa. C^ibitus forked . 
b. Tivo ocelli, one near each eye margin; petiole of media shorter 
than the length of the small cell 3. Genus Eudicrana, Loew. 
bb. When only two ocelli are present then placed close together and 
widely remote from the eye margin, otherwise iinth tliree ocelli. 
c. The R-M crossvein long and very oblique, appearing like the 
beginning of a longitudinal vein, and mucli longer tlian 
the small transverse basal section of tlie radial sector 
(PI. 3, Fig. 25, 26) 4. Genus Tetragoneura, Winnertz. 
cc. The crossvein sJiorter or not mncli longer than the base of the 
radial sector. 
d. Anterior veins unusually thick, siibcosta ends in R ,; pro- 
boscis about as long as height of tJie head (PI. I , Fig. 16; 
PI. 3, Fig. 27) 5. Genus Hadroneura, Lundstrom. 
dd. Anterior veins not unusually tliick. 
e. Media forks at or but little beyond the crossvein; in 
recent forms the cubitus forks distad of the fork of 
media . 
f. Media forks at tlie crossvein, tlie radial extremity of 
the R-M crossvein proximad of the medial end ; the 
subcostal ends in Rj (PI. 3, Fig. 28), Fossil . 6. Genus Necromyza, Scudder. 
ff. Media forks slightly distad of the crossvein. 
g. Middle ocellus someK'hat smaller than the laterals; 
thorax and scutellum hairy, not setose (PI, 3, 
Fig. 2 9) 7. Genus Sciophila, Meigen. 
(= Lasiosoma, Winnertz). 
gg. Middle ocellus very small (PI. 3, Fig. 30) . 8. Genus Stenophragma, Skuse. 
■ee. Media forks at least the length of the crossvein beyond 
the latter. 
f. Subcosta wholly absent (fossil) (PI. 4, Fig. I ) . 9. Genus Scudderiella, Meunier. 
ff Subcosta present. 
g. Sc^ (subcostal crossvein) wanting, and the subcosta 
ending in the costa (PI. 4, Fig. 2); ocelli 
three in a transverse line 10. Genus Apolephthisa, Grzegorzek. 
