238 NEW YORK STATE MUSEUM 



few coarse setae apically, postscutellum fuscous yellowish anteriorly. 

 Abdomen sparsely clothed with long hairs, dark brown, the basal 

 segment fuscous, the penultimate segment somewhat fuscous; 

 genitalia yellowish. Wings hyaline, cost a dark brown. Halteres 

 yellowish basally, fuscous and whitish apically. Coxae fuscous 

 yellowish, femora and tibiae lighter fuscous yellowish, tarsi mostly 

 dark brown; claws stout, strongly curved, the pulvilli one-half 

 longer than the claws. Genitalia; basal clasp segment stout; distal 

 clasp segment short, greatly swollen, the insertion almost subapical; 

 dorsal plate short, broad, broadly and triangularly emarginate; 

 ventral plate long, broad, broadly and roundly emarginate. Harpes 

 conspicuous, irregularly rounded. Type Cecid. aiQ-31. 



Rhopalomyia betheliana Ckll. 



1909 Cockerell, T. D. A. Can. Ent., 41: 150-51 



This species was reared March 30, 1909 from a flower gall of 

 Artemisia frigida sent to us through the courtesy of Professor 

 Cockerell from Denver, Col. Galls of this species on Artemisia 

 filifera were also received from Prof. C. P. Gillette, Fort Collins, 

 Col., in September 1909. 



Gall. The gall is about 3 mm long, 2 mm broad, obpyriform, 

 the apex truncate. It is pale yellowish with a fine, white tomentum. 



Pupa. The pupa has been characterized by Professor Cockerell 

 as a bright orange scarlet with a pair of prominent anterior pro- 

 jections. 



Male. Length 2 mm. Antennae nearly as long as the body, 

 sparsely haired, reddish brown; 17 segments, the fifth with a stem 

 three-fourths the length of the basal enlargement, which latter 

 has a length two and one-half times its diameter. Palpi; the one 

 segment is stout, variably fusiform. Mesonotum shining dark 

 reddish brown, the submedian lines sparsely haired. Scutellum 

 shining dark brown, postscutellum reddish brown. Abdomen 

 sparsely haired, a dull fuscous yellowish, the basal segment darker. 

 Wings hyaline, costa light brown. Halteres yellowish basally, 

 fuscous apically. Coxae dark brown. The legs a nearly uniform 

 light fuscous yellowish; claws rather stout, evenly curved, the 

 pulvilli nearly as long as the claws. Genitalia; basal clasp segment 

 stout; terminal clasp segment short, greatly swollen near the basal 

 third; dorsal plate long, broad, deeply and triangularly emarginate, 

 ventral plate long, truncate. Harpes narrow, narrowly rounded. 



Female. Length 2 mm. Antennae extending to the third ab- 

 dominal segment, sparsely haired, yellowish brown; 17, sometimes 

 16, segments, the fifth sessile, cylindric, with a length three times 

 its diameter, the terminal segment reduced, narrowly oval or fused 

 with the preceding. Palpi as in the male. Mesonotum (lark- 

 brown, the submedian lines sparsely haired. Scutellum dark reddish 

 brown, postscutellum dark brown. Abdomen sparsely haired, 



dark reddish, the ovipositor yellowish. Halteres whitish basally 



