104 NEW YORK STATE MUSEUM 



extending to the foiirth abdominal segment, the dorsum of the 

 latter with the segments margined with three or four rather sparse 

 rows of stout, chitinous spines. 



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

 haired, whitish transparent; fourteen segments, the fifth with stems 

 one-half and one and one-fourth times their diameters respectively 

 the distal enlargement cylindric, with a length about twice its diam- 

 eter, a broad, scattering whorl of stout setae, the circumfila with 

 short loops; terminal segment produced, the distal enlargement with 

 a length three times its diameter, tapering. Palpi; the first segment 

 short, stout, the second with a length about four times its diameter, 

 the third a little shorter, stouter, the fourth twice the length of the 

 third, dilated. Mesonotum yellowish brown. Scutellum and post- 

 scutellum orange. Abdomen rather thickly haired, fuscous yellowish 

 genitalia yellowish. Wings hyaline, costa pale straw. Halteres 

 yellpwish basally, fuscous apically. Coxae and legs fuscous yel- 

 lowish, the tarsi tinged with pale orange; claws slender, evenly 

 curved, the pulvilli a little shorter than the claws. Genitalia; basal 

 clasp segment long, stout; terminal clasp segment short, tapering- 

 dorsal plate long, deeply and triangularly emarginate, the lobes 

 narrowly rounded; ventral plate long, slightly expanded, broadlv 

 and roundly emarginate, the lobes slightly rounded. 



Female. Length 3 mm. Antennae extending to the second 

 abdominal segment, sparsely haired, pale yellowish and variably 

 tinged with carmine; fourteen sessile segments, the fifth with a 

 length three and one-half times its diameter; subbasal whorl scat- 

 tering, broad, subapical whorl scattering; circumfila near the basal 

 half and apically; terminal segment slightly reduced, narrowly oval. 

 Palpi; first segment stout, with a length three times its diameter 

 the second as long, more slender, the third a little longer, somewhat 

 dilated, the fourth as long as the third, more dilated. Mesonotum 

 yellowish brown, the submedian lines rather thickly haired. Scu- 

 tellum and postscutellum pale orange. Abdomen sparsely haired, 

 brownish orange; ovipositor pale yellowish. Halteres yellowish 

 orange, fuscous subapically. Coxae and femora fuscous straw, 

 tibiae and tarsi somewhat darker; daws rather stout, strongly 

 curved, the pulvilli longer than the claws. Ovipositor short, the 

 lobes tapering, narrowly rounded. Type Cecid. ai948. 



Caryomyia arcuaria Felt 

 1908 Felt, E. P. N. Y. State Mus. Bui. 124, p. 338 (Hormomyia) 



191 8 N. Y. State Mus. Bui. 200, p. 46 



This peculiar male was separated from a series of specimens 

 reared by the late Dr M. T. Thompson of Clark University, Worces- 

 ter, Mass., from what appear to be a typical lot of Caryomyia 

 caryae galls. This insect may have come from one of these 

 galls. 



_ Male. Length 3 mm. Antennae extending to the fourth abdom- 

 inal segment, sparsely haired, light yellowish; fourteen segments, 



