THE CANADIAN ENTOMOLOGIST. 211 



isli spots on lateral margins ; a row of grayish triangles on the median 

 band, most distinct on tlie second segment. Venter fulvous with light 

 hairs, darker towards the tip, and first and second segments more or less 

 dark. Femora black, brownish at the tips ; anterior pair entirely black. 

 TibiK dark brownish, the anterior pair black at the tip. I'arsi blackish- 

 brown, anterior ones black. Wings sub-hyaline ; costal vein slightly 

 brownish, faint clouds on cross-veins and bifurcation of third vein. 

 Described from two females from California. 



T. captonis, n. sp. Length r4 mm. Eyes pubescent, with three pur- 

 plish cross-bands. Front narrowed anteriorly, yellowish-gray, with black 

 hairs ; callosity large, chestnut-brown, shining, prolonged above ; sub- 

 callus denuded, shining ; ocelligerous tubercle dark brown, almost black, 

 and surrounded with black. Face and cheeks gray with white hairs. Palpi 

 yellowish with minute black hairs. Antennse reddish, annulate portion of 

 third joint black, angle not projecting much. Thorax brownish-black 

 with whitish and yellowish pubescence ; humerus reddish-brown ; pleura 

 and pectus grayish with white hairs. Abdomen yellow on the sides of 

 segments one to four ; a dorsal band and last three segments black ; hind 

 margins of segments yellow fringed with golden yellow hairs ; venter yel- 

 lowish with middle of segment one and the tips blackish. Femora black, 

 brownish at tip ; first pair of tibias black with proximate end brownish ; 

 middle and posterior tibiae brownish with black hairs, darker toward tip ; 

 tarsi dark brown. Wings hyaline, costal cell yellowish. Female from 

 California. 



T. centroH, n. sp. — Length r6 mm. 



Female. Habitat Colorado. 



Eyes pubescent. Front narrow gray ; callosity black shining, a de- 

 tached, spindle-shaped line above ; sub-callus denuded, shining ; ocelliger- 

 ous tubercle blackish Antennae black, slightly red at base of third joint. 

 Face and cheeks gray with gray hairs. Palpi yellowish. Thorax black 

 with dingy black hairs and five gray lines. Pleura and pectus black with 

 gray pollen and hairs. Abdomen brownish-black ; a row of equilateral 

 triangles on the middle and oblique triangles on each side of the first four 

 segments ; hind margins fringed with whitish hairs. Venter fulvous with 

 black on first segment, lateral margins and last four segments. Wings 

 hyaline ; costal cell yellowish-brown, and very faint clouds on cross-v^ins 



