176 THE CANADIAN ENTOMOLOGIST. 



joint nearly twice as long as the second and slightly longer than the third, 

 style two and a-half times as long as the third joint. Pile of prothorax 

 long, white, that of mesothorax very short, sparse, black, not forming a 

 crest, that on the posterior part longer and partly white ; dorsal stripes 

 and spots indistinct, grayish-black ; pile of pleura, legs and scutellum 

 white, that on the abdomen short, sparse, not parted in the middle where 

 it is largely black, elsewhere white ; pollen of abdomen nearly uniform 

 grayish-brown. Inner side of the front and hind tibiae next the tips, and 

 the under side of their first two tarsal joints, densely beset with rather 

 short golden-yellow pile. Halteres pale brown. Wings hyaline, small cross- 

 vein at middle of the discal cell, base of third submarginal cell at last third 

 to sixth of distance between small cross- vein and apex of discal cell ; costa 

 not enlarged. Hypopygium shining black, but slightly wider near the 

 apex than at the base, equal in length to the fifth and sixth abdominal 

 segments united, its pile white, more dense below at the base. 



? same as the £ , except the genitalia ; ovipositor slightly longer than 

 the fifth, sixth and seventh abdominal segments taken together. 



Length, 20 to 24 mm. Los Angeles and San Diego Counties, Cal. 

 Two males and two females. 



Efferia rava. n. sp. — $. Same as pemicis, with these exceptions; 

 Bristles of front, of upper part of occiput, on under side of antennae, in 

 lower part of mystax, and those of the palpi, black. Thorax with a 

 median crest of rather long and nearly black hairs ; the fan-like row of 

 hairs in front of the halteres mostly black, pile of scutellum also black. 

 Ovipositor but slightly longer than the sixth and seventh abdominal seg- 

 ments. Wings yellowish-hyaline. 



Texas. A single female (Morrison). 



Efferia Candida, n. sp., $ . Black, bases of tibitfi red. Pile and 

 bristles of entire head white, a few bristles of the occiput sometimes black, 

 pollen of head silvery-white. Pile of thorax short, sparse, black, not 

 forming a crest, that behind and on the prothorax longer and mostly 

 white ; stripes and spots of thorax distinct, black. Pile of pleura, legs, 

 scutellum and abdomen white, that on the abdomen rather long, parted in 

 the middle and directed outwardly ; abdomen nearly uniformly silvery- 

 white pollinose, destitute of black spots ; hypopygium shining black, 

 but slightly wider near the apex than at base, slightly longer than the fifth 

 and sixth abdominal segments taken together, its pile white. Front and 

 hind tibiae within next the tips, and under sides of their first two tareal 



