292 THE CANADIAN ENTOMOLOGIST. 



Oipriocerus albifasciattis, sp. nov. — Black, thoracic dorsum, posterior 

 margin of 4th and the following segments of abdomen rufous ; wings deep 

 fuliginous; legs black. Length, 18 mm. 



^. — Head black; face and occiput white pollinose ; mystax, 

 occipito-orbital bristles and beard black. Antennae black ; distal end of 

 the first and the entire small second segment reddish, both with black 

 hair. Lateral margins of proboscis, and the palpi, in certain lights rufous; 

 the latter with black hair. Dorsum of thorax, excepting that of the 

 prothorax and a distinct median line, rufous, with very fine black pile 

 and the usual black bristles ; anterior and lateral margins of prothorax 

 with longer black hair. Dorsum of prothorax, a broad stripe running 

 backward over the humeri to the base of the wings, and a short narrow 

 stripe on the mesothorax on each side of the median line, white pollinose. 

 Entire thoracic dorsum when viewed from the side appears thinly covered 

 with a hoary bloom. Pleura nearly glabrous, in certain lights with a 

 reddish tinge ; a spot above each coxa shining white pollinose. Scutellum 

 black, bordered very narrowly on the anterior, and on the posterior 

 margin when viewed from above, more broadly with white pollinose ; 

 bristles black. Halteres pale straw colour ; spot on thorax above their 

 insertion shining white pollinose. 



First four segments of abdomen black ; a large dull white pollinose 

 triangular spot on each side of segments 2 and 3, extending backward 

 nearly to the posterior margin, and on segment 2 in a narrowing stripe to 

 the middle of the tergum, thus forming a narrow pollinose cross band on 

 the anterior margin. The fascia? of segment 3 do not extend so far 

 upward in this specimen ; the sides of segment 1 are also somewhat 

 white pollinose. The posterior lateral margins of 2, a fine line on the 

 posterior portion of 3, the entire posterior margin of 4, and segments 5, 6 

 and 7, entire above, rufous. Pile of tergum short, black, fine, except on 

 the lateral margins of segments i and 2, where it is longer. 



Venter : segments 2 and 3 dull whitish pollinose ; the 4th almost 

 black, the following dark rufous ; pile black, sparse on segments i and 3, 

 denser and more tufted on the following. Genitalia black above, rufous 

 below, clothed with long whitish pile. Legs everywhere black, except at 

 the femero-tibial articulations, where they are rufous, the thick short pile 

 and bristles black. Claws black, at base rufous ; pulvilli straw-coloured. 

 Anterior coxje with a few whitish and many black bristles ; the posterior 

 pair obscurely white pollinose. 



