148 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) Kelt; EB. P.* N: ¥. Ent: Soc: Jour., 20: 106-7 
The midge was taken by Dr W. G. Dietz, Hazelton, Pa. 
Youngomyia vernoniae Felt 
I911_ 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 
I9g1t 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, 188 5, 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. 
