220 BULLETIN 31, UMTED STATES NATIONAL MUSEUM. 



iu both si'xes the femora with a triangular projection below near the 

 tip and a corresi)oudiug oue ou the tibiie near the base. Wings hyaline, 

 with brownish clouds along the veins, and a dark spot near the ti]) of 

 the auxiliary veiii. 



Two specimens (11. K. Morrison). This species must be allied to 

 Brachypalpus chrysitisoU Europe, and forms a connection with that genus. 



Crioprora alopex. 



Pocota alopex Osten Sacken, West. Dipt., 338. 

 Crioprora alopex Oaten Sacken, Cat. Dipt., 2."j1, note 241. 



Sa&*«a^.— California (O. S.). 



" $. Length 10 to 11™™. AntenniB brown, lirst joint black, arista 

 rufous ; head black, shining ; front rather broad, beset with yellow pile. 

 Thoracic dorsum beset with dense yellowish rufous pile, which nearly 

 conceals the shining black, sub-metallic ground color; pleurae black, 

 witli black pile; scutellum black, with a purplish reflection and long 

 black pile along the edge ; halteres brownish. Abdomen black, shining, 

 beset with black pile and some scattered i)ale yellow pile toward the 

 ti]). Legs black, knees and base of tibi?e of the two anterior i)airs 

 pale brownish; hind femora somewhat incrassate and beset with a tuft 

 of yellow hairs above; hind tibiae rather stout. Wings tinged with 

 reddish-brown anteriorly, especially along the veins, the inside of the 

 cells being i^aler; posterior portion sub hyaline, slightly brownish along 

 the veins." — Osten Sacken, 1. c. 



POCOTA.* 



Pocota St., Fargean and Serville, EucycL Meth., x, 518, 1825. 

 Dasijmyia Egger, Verb. Z. B. Ges., xiv, 71. 

 Hadronu/ia Williston, Can. Eut., xiv, 78. 



Large species, thickly pilose; black or metallic black, abdomen without 

 spots or bands. Head somewhat flattened. Eyes bare. Antenna? sit- 

 uated near the middle of the head in profile, short, the third joint ob 

 liquely oval. Face short, the oral margin in front not lower than the 

 lower border of the eye, gently or deeply concave from the antennae to 

 the tip, the tip standing forward as far as the base of the antennae, ob- 

 liquely truncate below ; the cheeks rather nariow, gently convex below, 

 and nearly at right angles tp the occiput. Thorax and scutellum large 

 and broad. Abdomen short, broader than the thorax. Legs stout, the 

 hind femora only slightly thickened, thickly beset on the under side with 

 short bristly hairs. Marginal cell of wing open; third vein nearly 

 straight, anterior cross- vein oblique, beyond middle of discal cell. Type 

 of genus P. apifornus (Schrauk) Schin. 



Our single known species must be nearly allied to P. apijormis. The 

 face is api)arently a little more deeply concave in profile and the insect 

 is larger. 



* Jloxoi, sheep wool. 



