REPORT OF THE STATE ENTOMOLOGIST I907 415 



ec Abdomen dark brown, length .75 mm ; 5th antennal segment 

 having tlie stems with a length '4 and i]'2 that of the diameter 



flavoscuta Felt, C. 76 

 eee Abdomen dark reddish, length i mm; 5th antennal segment hav- 

 ing the stems with a length i/^ and twice that of the diameter 

 foliora Rssl. & Hkr, C. 1339 

 dd Fifth antennal segment having the basal portion of the stem with 

 a length greater than its diameter 

 e Abdomen reddish brown, length 1.6 mm; 5th antennal segment 

 having the stems with a length V/z and 2^4 times that of the 



diameters claytoniae Felt, C. 46 



cc Ventral plate hardly tapering distally, very short and broad 



d Abdomen pale yellowish, length .75 mm; 5th antennal segment 

 having the stems with a length 2 and 2^ times that of the 

 diameters e x c a v a t i o n i s Felt, C. 65 



EPIDOSARIAE 

 This group contains a number of very characteristic forms 

 which nevertheless present many structural diversities. The 

 members of the group may be best recc5gnized by the well de- 

 fined cross vein uniting subcosta with the base of the third 

 vein. This cross vein frequently has a course nearly parallel 

 with costa, though in certain forms it diverges from the third 

 vein at an oblicjue angle, and in some species almost at a 

 right angle. The third vein unites with the margin of the wing 

 beyond the apex. Several genera are undoubtedly represented 

 in our American fauna which have not been differentiated from 

 the older established ones. So little is known of the life history 

 of these species and there is such great diversity between the 

 two sexes, that the present studies must be regarded as pre- 

 liminary. 



Key to genera 

 a Three long veins 



b Cross vein not parallel wiih costa 



c 5th vein forked, the wings very long and narrow, the legs long... 



Colpodia Winn. 



cc 5th vein simple, wings broader and legs shorter 



(type J. rubra) Johnsonomyia n. g. 

 bh Cross vein running parallel or nearly so to costa 

 c 5th vein forked 



d Antennae greatly prolonged in both sexes 



Forricondyla Rond. 

 dd Antennae not greatly prolonged in both sexes. .Dirhiza Winn. 



cc 5th vein simple Holoneurus Kieff. 



aa 4 long veins, the 5th simple 



b Cross vein running parallel or nearly so to costa. .Asynapta H. Lw. 



hb Cross vein miming at a considerable angle with costa 



Winnertzia Rond. 



