552 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 4 



Reared by Theodore Pergande from lobulate leaf galls on running 

 oak, Quercus pumila collected by Mr. Koeble at Donner, Cal. Loaned 

 for study by the U. S. National Museum. Type C. 1009. 



Youngomyia vernoniae n. sp. Male. — Length 2 mm. Antennae pale yellowish; 

 fourteen segments, the flagellate ones trinodose, the fifth having the basal portion 

 of the stem with a length one half greater than its diameter, a well marked constric- 

 tion in the middle of the distal enlargement, its length being half its diameter, while 

 the distal portion of the stem has a length two and one half times its diameter; basal 

 enlargement globose, with a sparse subbasal whorl of stout setae and a rather slender 

 circumfilum, the loops extending to the base of the distal enlargement, which latter 

 has subbasal and subapical circumfih, the loops of the latter extending to the apex of 

 the segment; ter min al segment greatly produced, the basal portion of the stem 

 with a length five times its diameter, the constriction of the distal enlargement with 

 a length one half greater than its diameter; apically there is a long, finger-like process 

 with a length six times its diameter. Palpi; first segment irregularly oval, the 

 second longer than the first, dilated apically, the third and fourth subequal, slender. 

 Mesonotum pale yellowish brown. Scutellum, postscutellum and abdomen yellowish 

 brown, the last with the third and fourth segments dark brown; genitaha yellowish. 

 Wings hyaline, costa light brown. Halteres yellowish transparent. Legs a nearly 

 uniform yellowish straw; claws stout, rather strongly curved, the anterior uniden- 

 tate, the puhilh about half the length of the claws. Genitaha; basal clasp segment 

 stout, truncate distally; terminal clasp segment one half longer, rather slender, 

 curved; dorsal plate broadly and triangularly emarginate, the lobes thickly clothed 

 internally with stout, tapering sette; ventral plate long, broadly rounded apically 

 and thickly clothed distally with stout, tapering setse; style long, stout, expanded 

 distally. 



Female. — Length 2.5 mm. Antennae light fuscous; fourteen segments, the fifth 

 with a stem one fourth the length of the subcyhndric basal enlargement, which 

 latter has a length about three and one half times its diameter; terminal segment 

 produced, the basal enlargement subcyhndric, with a length nearly five times its 

 diameter and apically a long, slender, finger-hke process, swollen basallj-. Palpi; 

 first segment with a length nearl}- three times its diameter, the second about twice 

 the length of the first, the third and fourth subequal. Mesonotum light reddish 

 brown. Scutellum pale yellowish; postscutellum yellowish brown. Abdomen 

 rather thickly haired, dark yellowish brown. Wings with costa pale yellowish. 

 Halteres yellowish transparent. Legs a nearly uniform hght yellowish browTi. 

 0\ipositor short; terminal lobes large, suborbicular, thickly clothed with short, 

 stout setse. 



Reared from blossoms of Vernonia noveboracensis collected in Vir- 

 ginia and loaned for study by the U. S. National Museum. Type C. 

 973. 



Hyper diplosis fungicola n. sp. Male. — Length 1 nmi. Antennae yellowish white; 

 fourteen segments, the fifth having the basal portion of the stem with a length 

 nearly three times its diameter, the distal part with a length about two and one half 

 times its diameter; basal enlargement subglobose, subbasal whorl rather sparse, the 

 subapical circumfilum with loops extending nearly to the base of the produced dis- 

 tal enlargement, wiiich latter has a length about one half greater than its dia- 

 meter, a sparse whorl of stout setae, subbasal and subapical circumfih, the loops 



