October, '11] 



FELT: NEW GALL MIDGES 



477 



of very long, stout setae and a thick subapical band of shorter, strongly curved setae; 

 terminal segment produced, with a length over four times its diameter and tapering 

 nearly uniformly to a subacute apex. Palpi; first segment narrowly oval, with a 

 length about one-half greater than its diameter, the second segment with a length 

 three times the first, the basal half slender, the distal portion greatly enlarged and 

 sparsely setose. Mesonotum dark brown. Scutellum sooty white basally, fuscous 

 apically, post-scutellum sooty white. Abdomen with the sclerites fuscous yellowish 

 the incisures and pleura; whitish. Ovipositor fuscous, the terminal lobes yellowish. 

 Wings fuscous, thickly clothed with narrow scales; costa black, thickly scaled, 

 subcosta uniting therewith at the basal third, the third vein well beyond the apex, 

 the simple fifth at the distal tliird, the sixth near the basal half, the two latter rudi- 

 Inentar3^ Halterese whitish basaljy, fuscous apically; tibia; and tarsi a somewhat 

 variable fuscous. Claws stout, strongly curved, unidentate, the pulvilli about 

 one-third the length of the claws. Ovipositor strongly curved ventrally and ante- 

 riorly, the convex rounded surface chitinized, its surface and the dorsal and ventral 

 plates of the preceding segment with numerous chitinous, finely denticulate, trans- 

 verse ridges; terminal lobes extending posteriorly, slender, with a length about 

 four ti^nes the diameter, narrowly rounded apically and sparsely setose. 



Reared from punky poplar wood collected at Nassau, N. Y.Type 

 C. a 2152. 



Fig. 11. Kronomyia populi, female: a, terminal antennal segment ; b, distal palpus 



segment (Original) 



Oligarces ulrni n. sp. <MaZe.— Length 0.8 mm. Antennae short, very sparsely haired, 

 whitish transparent; eleven segments, the fifth subcylindric, with a length about 

 one-fourth greater than its diameter; terminal segment slightly produced, sometunes 

 nearly fused with the preceding, and with a length nearly one half greater than its 

 diameter, and broadly rounded apically. Mesonotum light brown. Scutellum 

 yellowish transparent, postscutellum slightly fuscous. Abdomen yellowish orange, 

 reddish basally, the genitalia a Ught fuscous. Halteres whitish transparent. 

 Legs yellowish transparent; claws long, moderately stout, nearly straight, the 

 pulviUi rudimentary. Genitalia; basal clasp segment moderately long, stout, 

 obUquely truncate; terminal clasp segment long, stout, swollen near the middle, 

 broadly rounded apically and thickly setose; dorsal plate short, broadly and roundly 

 emarginate, the lobes broadly rounded and sparsely setose; ventral plate long, 



