230 NEW YORK STATE MUSEUM 
Trishormomyia clarkei Felt 
1908 Felt, E.P. N. Y. State Mus. Bul, 124, p. 388 (Hormomyia) 
1915 ———— N.Y. State Mus. Bul. 175, pl. 4, fig 7 (Hormomyia) 
1918 ————— N.Y. State Mus. Bul. 200, p. 133 (Hormomyia) 
The female was reared April 7, 1908 from a terminal bud gall on 
Spiraea salicifolia collected by Cora H. Clarke, at Mag- 
nolia, Mass., October 14, 1907. The larvae at the latter time were 
in yellowish, oval cocoons about 2.5 by 1.5 mm in diameter. The 
deep orange, stout larvae, about 5 mm long desert the galls in the 
fall, hibernate in the soil, the adults appearing in the spring and 
presumably oviposit in the opening buds. Apparently the same gall 
was collected at Lake Placid, N. Y. 
Gall. The larvae occur in nearly globular terminal bud galls 
about 4 mm in diameter and with a nearly normal green color, 
except that the tips of the rather closely adherent bud scales are 
tinged with dark red. 
Female. Length 3.5 mm. Antennae extending to the third 
abdominal segment, sparsely haired, dark reddish brown, fuscous 
basally; fourteen subsessile, cylindric segments, the fifth with a 
length about two and one-half times its diameter; the loops of the 
circumfila, anastomosing irregularly, have a length about equal to 
the distance separating their bases. Palpi; the first segment sub- 
quadrate, with a length twice its diameter, the second long, with a 
length three times its diameter. Face fuscous. Mesonotum shining 
dark brown, the submedian lines sparsely haired. Scutellum and 
postscutellum reddish brown. Abdomen dark reddish, nearly 
smooth, the pleurae a variable dark brown and reddish. Ovipositor 
reddish orange, the venter dark reddish, the basal segment a variable 
fuscous. Wings hyaline, costa yellowish brown, the third vein at 
the apex. Halteres yellowish basally, reddish apically. _Coxae 
reddish brown; femora, tibiae and tarsi a variable fuscous yellowish; 
claws long, stout, strongly curved; pulvilli longer than the claws. 
Ovipositor short, the terminal lobes with a length three times their 
width, roundly truncate. Type Cecid. a1759a. 
Trishormomyia verruca Walsh 
1864 Walsh, B.D. Ent. Soc. Phil. Proc., 3:606 (Cecidomyia) 
1867 ————— Ent. Soc. Phil. Proc., 6:226 (Cecidomyia) 
1906 Felt, E.P. Insects Affecting Park & Woodland Trees, N. Y. State Mus. 
Mem. 8, 2:745 (Cecidomyia) 
1910 Stebbins, F. A. Springfield Mus. Nat. Hist. Bul. 2, p. 10 (Cecidomyia) 
1915 Felt, E.P. N. Y. State Mus. Bul. 175, pl. 4, fig. 14 (Hormomyia) 
1918 ————— N.Y. State Mus. Bul. 200, p. 33 (Hormomyia) 
A single female was reared from this gail May 8, 1908 from mate- 
rial taken by Cora H. Clarke at Magnolia, Mass., the preceding fall. 
