FUNGUS GNATS OF NORTH AMERICA. 1 53 



Hadroneura kincaidi Coquillett. 



1900. kincaidi, Coquillett, Proc. Wash. Ac. Science. II. 391. 



(Neocmpheria). 



Female. Length 6 mm. Head and its members black, sec- 

 ond joint of antennae yellow, about one-half as long as the 

 third, the 3 ocelli in a transverse row and widely separated from 

 each other ; thorax black, opaque, gray pruinose, the mesonotum 

 marked with 4 polished vittse, scutellum black, the base nar- 

 rowly yellow, its hairs and those of the thorax golden yellow; 

 abdomen brownish black, slightly polished, its hairs yellowish ; 

 coxae and femora yellow, tibise yellowish brown, tarsi dark 

 brown, front tarsi toward their apices, noticeably higher than 

 wide ; halteres yellow ; wings hyaline, bare, subcostal vein end- 

 ing in R^ before middle of cell R^, the latter about twice as long 

 as wide, anterior fork of media about 10 times as long as its 

 petiole, cubitus forking far before R-M crossvein, the latter 

 shorter than first section of radial sector. Popof Island, 

 Alaska. July. 



I have seen this species at the U. S. Nat. Museum, hence the 

 generic reference. 



10. Genus Diomonus Walker. 

 Diomonus, Walker, List. Dipt. Brit. Mus. I. 87. 1848. 



Large species, over 6 mm. in length. Ocelli 3, widely sepa- 

 rated, the middle one but little smaller than the laterals ; an- 

 tennae 24-14 jointed, first Ijasal joint pilose beneath. Thorax 

 pilose rather than setose. The costa (fig. 94) ends at or but 

 very slightly beyond the tip of R4+- close to the tip of the wing; 

 R4+.- slightly bowed back at the middle ; cell R^ less than twice 

 as long as wide : petiole of the media longer than the R-M cross- 

 vein ; the cubitus forks far ]iroximad of the fork of the media ; 

 the setulns are longer and more dense than in MycoDiya; the 

 v.'ing is marked with two dark spots. Legs very long, fore 

 metatarsus longer than the tibia ; the middle femur of the male 

 bears a blunt spine on the under side: hypopygium small (figs. 

 123. 125). 



Walker's com])arison of this genus with Lcptomorphiis is a 

 most happy one, for with the exception of the presence of R„^3 

 in the wing of Diomonus, the two are very similar in structural 

 characters. 



