Diptera of St. Vincent {West Indies). 393 



1. Psilopa nigra, n. sp. (PI. XIII., fig. 139, head of ? .) 



$ . Front and face deep black, the former broader than long, a 

 little shining ; the latter lightly-dusted, gently and evenly convex 

 in the middle above, the convexity not reaching to the margin of 

 the eye, thus forming a concavity for each antenna ; face on the 

 sides below with two stout bristles, the upper one arising very 

 close to the eye. Antennaj black, the third joint oblong ; bristle of 

 the second joint stout and long ; arista with ten or twelve rays. 

 Clypeus moderately projecting ; proboscis and palpi black. Thorax 

 and abdomen black, moderately shining, in an oblique light lightly 

 yellowish greyish-dusted ; second, third, and fourth segments of 

 the abdomen of nearly equal length, the fifth a third longer 

 than the preceding ; in the female the fifth segment of the same 

 length as the preceding ; the sixth less than half the length of the 

 fifth. Legs black; all the tarsi yellow, with the distal joints blackish. 

 Wings greyish or brownish hyaline ; second section of the costal 

 vein about one-third longer than the third section ; ultimate 

 section of the fourth vein only a little longer than the penultimate 

 section. Length 3 mm. 



Two specimens. St. Vincent. 



2. Psilopa nigropunda. 



^ . Front black, moderately shining, much broader than long. 

 Antenna3 black ; third joint oblong ; bristle of the second joint of 

 moderate size ; arista with five rays above. Face densely light 

 grey-pollinose ; the structui'e of the upper part as in P. nigra^ but 

 the face narrower ; on the lower part with two stout bristles on 

 each side, the upper one more remote from the eye than in P. nigra. 

 Thorax and abdomen deep shining black, the scutellum opaque. 

 Abdomen broad, the fifth segment a little shorter than the fourth. 

 Legs deep black ; all the tarsi yellow, with the terminal joints 

 blackish. Wings greyish ; third section of the costal vein a little 

 more than half the length of the second section; penultimate 

 section of the fourth vein about one-half the length of the ulti- 

 mate section ; a minute black spot at the tip of the third vein. 

 Length 2 mm. 



One specimen. St. Vincent. 



3. Psilopa nigrimana, n. sp. 



^ . Shining black. Front, with a light depression on each side 

 above the root of the antennse. First two joints of the antennae 

 black, the third brown, on the inner underside reddish ; spine of 



