ADAMS: DIPTERA AFRICANA. 161 



broad, shining; a broad stripe from lower angle of eye to oral 

 margin shining black. Cheeks largely shining black; light 

 pilose. Occiput black, grayish pollinose and white pilose. 

 Proboscis black, long as height of head. AntennaB black, third 

 joint as long as first and second together, arista yellow, about 

 as long as third joint. Thorax black, brownish pollinose, 

 sparsely so back of suture, pile yellowish ; scutellum yellow 

 translucent, yellow pilose on base and margin, pile of dorsum 

 black. Halteres yellow. First segment of abdomen black, 

 yellow on sides, with grayish pollen ; second segment yellow, 

 narrowly bordered anteriorly with black, a broader band on 

 hind margin slightly projecting forward in the middle ; third 

 segment yellow on basal half, subopaque black on apical half; 

 fourth and fifth segments wholly subopaque black ; venter yel- 

 low, second and third segments with a black spot on lateral 

 margin, fourth and sixth segments wholly black. Femora 

 shining black, tips of tibiae, anterior tarsi, last four joints of 

 middle tarsi, and last joint of hind tarsi fuscous. Wings hya- 

 line. Length, 13 mm. 

 One specimen ; February. 



Eristalis aequalis, n. ep. 



Female : Front black, grayish pollinose, largely black pilose, 

 vertex subshining, a small tubercle above base of antennae shin- 

 ing black ; eyes sparsely pilose above, with four dark brown, 

 vertical stripes, between which are small dark brown spots, 

 most numerous on upper half of eye, in which region the facets 

 are scarcely larger than on lower half of eye ; face black, gray- 

 ish pollinose, yellowish pilose, with three shining black vittee ; 

 a broad stripe from lower corner of eye to oral margin, and 

 cheeks largely, shining black ; occiput subshining black, gray- 

 ish pollinose ; antennae reddish yellow, upper margin and tip 

 of arista black. Thorax brownish pollinose, dorsum with four 

 shining black vittae, each of which is bordered with a velvety- 

 black line, pile yellowish ; scutellum yellowish translucent, 

 with yellow pile ; halteres yellow. First segment of abdomen 

 yellow, a central triangle and a small oval oblique spot on 

 each side black ; second segment yellow, a narrow black band 

 on anterior margin, a large semicircular spot occupying the 

 apical half, shining on posterior edge ; third segment largely 



