FAAI. MYCETOPHILID^ 
59 
m. Subcosta more than half the length of the 
basal cell, end free 67. Genus Tei.maphilus, Becker. 
mm. Subcosta short. 
n. The media forks distad of the end of the 
basal cell R, casta extends very little 
beyond the end of the radial sector; ocelli 
three, middle one very small (PI, 6, 
Fig. II) 5o. Genus Phronia, part, Winnertz. 
nn. The media forhs proximad of the end of 
the basal cell R, middle ocellus either 
present or abse7it {P\. Q,F\g. \Q) . 57. Genus Exechia, Winnertz. 
kk. The ranges of setae on the hind tibiae conspi- 
cuously stout, setae at hast twice as long as 
the diameter of the tibiae. 
I. Extinct form from amber ; two ranges of setae 
on hind tibiae (PI. 6, Fig. 2 1). . . 58. Genus Pal^oepicypta, Meunier. 
II. Recent forms. 
m. Subcostal vein ends in R ,; branches of the 
cubitus noticeably divergent. 
n. With two ranges of setae on the hind 
tibiae (PI. 6, Fig. 5) . . . . 46. Genus Synplasta, Skuse. 
nn. With three ranges of setae on the hind 
tibiae. 
o. Anal vein not reaching the margin of 
the wing {P\. 6, Fig. 25) . . 63. Genus Dynatosoma, 
00. Anal vein prolonged to the margin 
(PI. 5, Fig. 24) 64. Genus Delopsis, Skuse. 
mm. Subcostal vein ends free; branches of the 
cubitus parallel on the apical third, or 
convergent or only slightly divergent. 
n. Male genitalia conspicuously large and 
husk-like (PI. 7, Fig. 1 8), female 
with a fi inge of setae on the ventral 
side of the sixth abdominal segment . 66. Genus Opistholoba, Mik. 
nn. Genitalia not as described above. 
o. Ocelli two, none in the middle (Pi. I , 
Fig.lO,ll,l2;PI.6,Fig.23, 
24; PI. 7, Fig. 17). . . . 65. Genus Mycetophila, Meigen. 
00, Three ocelli, middle one very minute. 
p. Branches of the cubitus make a very 
acute angle ivith each other and 
slightly divergent, fork usually 
proximad of fork of the media, 
casta usually slightly produced 
beyond the tip of the radial sector 
(PI. 6, Fig. 20) .... 59. Genus Epicypta, Winnertz. 
