Williston.] '^1^ [May 19, 



The black of the legs, in one specimen, includes a larger part, with a 

 portion of the anterior and middle tarsi. 



IX. 



J. — Small cross-vein before the middle of discal cell. 

 2. — Antennae shorter than the head. 

 aa. — Marginal cell closed and petiolate. 



IT. — Second and third joints of antenna; elongate ; arista very densely 

 plumose, appearing like a solid mass ' *Copestylum. 



* CoPESTYLUM MARGINATUM (Say), O. S. Say, Compl. Wr. ii, 3(50 

 (Volucella). Mexico, Texas. 



UU. — Third joint of antenn* elongate ; arista feathery 



c Volucella, 

 l>^^'^ose jTemnocera. 



* VoLUCELiiA AViDA O. S., Wcst Dipt., 333. California. Mexico. 

 Volucella satur O. S., 1. c, Colorado. Utah ! 



Volucella fasciata Macq., Dipt. Exd., ii. 2, 21, 1. Western 

 Kansas ! Texas, Colorado. Mexico. 



Volucella facialis, sp. nov. 



(5^9' Closely related to V. evecta Walk., but differs in the face being 

 quite yellow, with yellow pile, and the dorsum of thorax and pleurse be- 

 ing covered with black pile. 



Face yellow, yellow pilose, cheeks black, shining, bare. Antennge : 

 first two joints brownish-black, third joint red, or reddish-brown, arista 

 darker, black plumose. Front in female yellow, darker at the vertex, 

 yellow pilose; frontal triangle {(J^) black, or brown Avith shorter j^ellow 

 pile, vertex with tuft of long yellow pile. Thorax black, shining, the dor- 

 sum broadly black pilose, in front and behind and on the sides with 

 longer yellow pile, pleura3 with black pile. Abdomen black, shining, 

 second segment except the middle third or half, and narrow posterior 

 border, light yellow, the narrow 'posterior part of third, the fourth and 

 fifth segments conspicuously red pilose, other parts of abdomen with 

 shorter black pile. Legs black, black pilose, basal portion of tibiie and 

 all the tarsi dark red. Wings hyaline, the veins with brown clouds, a 

 brown spot opposite the small cross- vein. Long. corp. 14-15 mm. Three 

 specimens. California. 



The posterior part of the abdomen in V. evecta is usually black pilose 

 without any trace of the red, but rarely in some specimens the abdomen 

 is marked precisely like facialis, and hence it is quite probable that 

 specimens of- the California species may sometimes lack the rufous pile. 

 The black pile of the thorax will at once distinguish the species or 

 variety if it should prove to be such, as in a large number of specimens of 

 evecta I have never found any with such thoracic pile. However, as 

 regards its specific distinction, see Eristalis flavipes meUoiastomus Lw. 



