130 MAINE AGRICULTURAL EXPERIMENT STATION. I9IO. 



tcrior margin with cinereous cloud ; subcosta ends in the costa 

 a httle proximad of the apex of cell R^ ; the petiole of the media 

 shorter than this cell ; base of the fork of the cubitus under the 

 center of the R-M crossvein. Halteres pale. Recorded from 

 New York. 



Male. Length S^^mm., wing 6 mm. Face wholly yellow, 

 pile of face and eyes yellow, mesonotum with three broad pale 

 brown stripes, covered with fine yellow pile, setae of humeri and 

 ai the base of the wing black ; setae on lateral margins fuscous ; 

 dorsal surface of scutellum and metanotum infuscated, setae of 

 the former short, the latter with an irregular transverse row 

 of long black ones over the base of the abdomen ; setae of pos- 

 terior part of pleura, long, fine, and pale yellow. The basal half 

 or two-thirds of the second, third, fourth and fifth abdominal 

 segments and the hypopygium (fig. iii) yellow, the remaining 

 parts black, s'etulae black on the black parts and yellow else- 

 v/here. Tibial setas longer than the diameter of the tibiae, black, 

 and arranged in about four longitudinal rows ; one spur on each 

 fore tibia ; two on each of middle and hind tibiae ; fore micta- 

 tarsus one and three-eighths, the second fore tarsal joint two- 

 thirds as long as the tibia ; all claws with two teeth each. Brown- 

 ish cloud covers the apical fourth of the wing (fig. 83) ; sub- 

 costa ends very slightly distad of the cell R^. In other respects 

 like the female. One specimen collected by Mr. C. W. Johnson 

 at Capens, Maine, in July. 



3. Genus Tetragoneura Winnertz. 

 Tetragoneura, Winnertz, Stett. Ent. Zeit. VII. 18. 1846. 

 Head spherical, flattened in front, placed low upon the thorax ; 

 eyes circular, bulging ; ocelli three in number, placed in a curved 

 line 'upon the broad front, the middle one smaller than the lat- 

 , erals ; palpi incurved, four jointed, the first joint very small, 

 the fourth long, filiform; antennae arcuated, projected forward, 

 2-J-14 jointed, the first two differentiated, both long setose at 

 the apex, the flagellar joints cylindrical, slightly compressed, 

 short pilose. Thorax oval, highly arched ; scutellum small, trun- 

 cated behind, long setose ; metanotum highly arched. Abdomen 

 seven segmented, cylindrical in the male, with short forceps 

 (fig. 108) ; in the female somewhat compressed, terminating in 

 an ovipositor with two lamellae. Legs moderately long ; femora 

 compressed, all tibiae with lateral setae. Wing (fig. 85) some- 



