230 NEW YORK STATE MUSEUM 



Trishormomyia clarkei Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 388 (Hormomyia) 



1915 N. Y. State Mus. Bui. 175, pi. 4, fig 7 (Hormomyia) 



1918 N. Y. State Mus. Bui. 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 

 prestimably oviposit in the opening buds. Apparently the same gall 

 was collected at Lake Placid, N. Y. 



Gall. The lar\^ae 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. Scutellmn and 

 postscutellimi 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; pul villi longer than the claws. 

 Ovipositor short, the terminal lobes with a length three times their 

 width, roundly truncate. Type Cecid. ai759a. 



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 AflEecting Park & Woodland Trees, N. Y. State Mus. 

 Mem. 8, 2:745 (Cecidomyia) 



1910 Stebbins, F. A. Springfield Mus. Nat. Hist. Bui. 2, p. 10 (Cecidomyia) 



1915 Felt, E. P. N. Y. State Mus. Bui. 175, pi. 4, fig. 14 (Hormomyia) 



1918 N. Y. State Mus. Bui. 200, p. 33 (Hormomyia) 



A single female was reared from this gall May 8, 1908 from mate- 

 rial taken by Cora H. Clarke at Magnolia, Mass., the preceding fall. 



