132 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



furcation of the cubitus is nearly opposite to the proximal end 

 of the R-M crossvein. Recorded from Missouri (May). 



Male. Wing shown in figure 85. Dififers from female only 

 ii, having yellow and black setae on the margin of the mesono- 

 tum ; the trochanters are margined with black. The fore meta- 

 tarsus is two-thirds, the second fore tarsal joint one-third as 

 long as the tibia ; the hypopygium is minute and very incon- 

 spicuous (fig. 108). A single specimen from L. Toxaway, 



N. C. i r ' ^ 



3. Tctragoneura bicolor Coquillett. 



1901. bicolor, Coquillett, Proc. U. S. Nat. Mus. XXIII. 595. 

 Female. Length 3.5 mm. Head black, first two joints of 

 antennas and the mouth parts yellow, remainder of antennae 

 dark brown ; thorax and scutellum black, somewhat polished, 

 the hairs reddish brown and black ; abdomen yellow, its hairs 

 also yellow ; halteres, coxse, femora, and tibise yellow, apices 

 of tarsi brownish yellow ; wings hyaline, subcostal vein ending 

 in R^ about midway between the humeral crossvein and base 

 of the radial sector; cubitus forking close to its base; length 

 3.5 mm. N. H. 



4. Tctragoneura pimpla Coquillett. 



1901. pimpla, Coquillett, Proc. U. S. Nat. Mus. XXIII. 595. 

 Female. Length 4.5 mm. Head black, base of antennae and 

 mouth parts yellow ; body brown, two indistinct vittae and lat- 

 eral margins of mesonotum, a spot above front coxae, posterior 

 margins of second and following abdominal segments, and the 

 the genitalia, yellow ; hairs and bristles of thorax black, those 

 of abdomen chiefly yellowish brown ; coxae and femora yellow, 

 tibise and tarsi brownish yellow, halteres yellow ; wings grayish 

 liyaline, the subcostal vein ends in R^ nearly midway between 

 the humeral crossvein and base of the radial sector, cubitus 

 forks near its middle, at a point almost opposite the union of 

 the small crossvein with the media. Pennsylvania. ^. 



4. Genus Sciophila Meigen. ^.«r- 



Sciophila, Meigen, Syst. Beschr. I. 245. 1818. 

 Sciophila, Rondani, (nee Winnertz), Dipt. Ital. Prodr. I. 194. 



1856. 

 Lasiosoma, Winnertz, Verb. Zool-bot. Ges. Wien. XIII. 748. 



1863. 



