I48 NEW YORK STATE MUSEUM 



the submedian lines narrow, yellow, sparsely setose. Scutellum pale 

 yellow, sparsely setose, postscutellum and abdomen dark brown, 

 the basal segment slightly darker. Genitalia pale yellowish, dark 

 brown distally. Wings hyaline, costa light brown. Halteres pale 

 yellowish basally, slightly fuscous apically. Legs yellowish brown; 

 claws long, stout, strongly curved basally, slightly so apically. 

 Genitalia; basal clasp segment short, stout, a long, narrowly tri- 

 angular lobe basally; terminal clasp segment long, swollen basally; 

 dorsal plate broad, triangularly incised, the lobes slender, nar- 

 rowly rounded; ventral plate broad at base, tapering, broadly 

 rounded. Type Cecid. 423. (See plate 7, fig. 1, plate 12, fig. 2) 



Youngomyia pennsylvanica Felt 



1912 Felt, E. P. N. Y. Ent. Soc. Jour., 20: 106-7 



The midge was taken by Dr W. G. Dietz, Hazelton, Pa. 



Youngomyia vernoniae Felt 



191 1 Felt, E. P. Econom. Ent. Jour., 4:552 



This striking form was reared June 2, 1886 from blossoms of 

 Vernonia noveboracensis collected in Virginia Sep- 

 tember 23, 1885. The material was kindly loaned for study by the 

 United States National Museum. The yellowish brown male may 

 be separated from allied forms by the basal portion of the stem of 

 the fifth antennal segment being shorter than the distal part. The 

 female has the basal portion of the fifth antennal segment at least 

 moderately prolonged. Inostemma horni Ashm. and 

 Trichacis rubicola Ashm. MS. (Insect Life, 4: 124, 125) 

 were with little question reared from this midge. 



Gall. There appears to be no description aside from the mere 

 statement that the specimen was reared from the blossoms, presum- 

 ably aborted as in Sambucus infested by Y . umbellicola O. S. 



Youngomyia quercina Felt 



1911 Felt, E. P. Econom. Ent. Jour., 4:551-52 



The midge was reared by Mr Pergande June 4, 1886 from globular 

 leaf galls on the running oak, Quercus pumila, collected 

 by Mr Koebele at Donner, Cal., September 9, 1885, and kindly 

 loaned for study by the United States National Museum. The 

 yellowish brown male may be separated from its allies by the struc- 

 ture of the antennae and genitalia. 



Gall. Diameter 4 mm, globular or subglobose and "on the under 

 side of the leaf. The two specimens available were both at the end 

 of one small leaf. 



