86 KANSAS UNIVERSITY SCIENCE BULLETIN. 



Diaphorus dimidiatus. 



Aldrich, Trans. Lond. Entom. Soc, 1896, 322. 



Thirteen males, four females. The latter are readily dis- 

 tinguishable by the bristles of the fore coxa 1 , although they do 

 not have the yellow color on the abdomen that characterizes the 

 males. 



Diaphorus amoenus, n. sp. 



Male : Face rather wide, green, in an oblique direction yel- 

 low pollinose ; front wide, bright green ; antenna? black, the 

 first joint slightly elongate, third pointed, arista completely 

 apical ; palpi very large, yellowish white, hanging down about 

 a third the height of the head, about two-thirds as wide as long ; 

 cilia of inferior orbit white ; thorax and abdomen bright green 

 above, somewhat golden, the former a little dusted ; pleura? 

 blackish green, slightly pruinose with white ; tegular cilia few, 

 yellowish white ; halteres yellow, abdomen slender, the bristles 

 at apex distinct ; fore coxa? yellow, the others brown ; femora 

 and tibia? yellow, the hind femora slightly infuscated at tip 

 fore and middle tarsi slightly exceeding their tibia? in length 

 all tarsi gradually infuscated toward the tip ; front pulvilli 

 elongated, the others also a little conspicuous ; wings of medium 

 size, tinged with gray. 



Female : The only female I have is almost exactly like that 

 of flavipes. The antenna? being more distinctly black, and the 

 coxa? with noticeably longer and more numerous brown hairs, 

 are the only differences I can detect. The male amoenus has but 

 a few long, brownish hairs in a row down the fore coxa?. 



Length, 2.5 mm. ; of wing, 2 mm. Three males, one female. 



Diaphorus flavipes. 



Aldrich, Trans. Lond. Entom. Soc, 1896, 323. 



Numerous males and females. 



Diaphorus opacus. 



Loew, Neue Beitr., VIII, 56; Mon. N. A. Dipt., II, 160. 

 Aldrich, Trans. Lond. Entom. Soc, 1896, 320. 



Six males. A comparison with specimens from the United 

 States establishes their identity, as also that of the St. Vincent 

 specimens referred to in the previous article. 



Length of the present specimens, 2.8 mm. 



