Dolichopodidse of St. Vincent (West Indies). 3i3 



PSILOPUS. 



Meigen, Syst. Beschr., vi., 1824. 



1. Psilopus chrysoprasius. 



Walker^ List, &c., iii., 646 ; Loew, Neue Beit., viii., 90 ; 



Monogr.j ii., 266. 

 Numerous specimens. Sea level to 500 feet. May. 



2. Psilopus caudatulus. 

 Loew, Neue Beitr., viii., 93 ; Monogr., ii., 271. 

 Four males, two females. May. 



3. Psilopus hellnluSj n. sp. 



Shining dark green, cilia of tegulse black ; wings with a dark 

 spot along the apical part of the front side. 



$ , Face bright-green slightly white-dusted, with a deep 

 transverse impression below the middle, bare. Paipi black ; 

 proboscis brown. Front shining green with sparse and very 

 delicate white hairs, especially towards the sides. Antennas black ; 

 small, the arista dorsal not long. Thorax shining green with erect 

 and rather long bristles. Scutellum with four bristles. Pleurae 

 green, white-dusted. Tegul^ and their cilia black ; halteres 

 fuscous with a yellow knob. Abdomen shining green, somewhat 

 coppery, with a broad black band across each incisure ; on each 

 side of the first segment a tuft of white hair, and a few more 

 white hairs on the ventral surface, except these, the hair and 

 bristles of the abdomen are all black. Bristles before the incisures 

 rather long and erect. Hypopygium black, the lamellae whitish or 

 greyish. Coxse, femora and hind tarsi including the extreme tips 

 of the hind tibiae, black. Tibi^ yellow. Fore and middle tarsi a 

 little infuscated toward the tip ; still the fourth joint of the 

 middle tarsus is covered with white hair, and hence almost white in 

 colour. Fore coxae with white hairs and two black bristles. All 

 the femora with white cilia below, longest on the front ones 

 near the base. Front tibiae on the upper side with a row of four 

 successively longer bristles, the last conspicuously long and two- 

 thirds of the way to the end. Bristles of the other tibiae incon- 

 spicuous, the hind tibige rather hairy. Tarsi simple, the hind ones 

 shorter than their tibiae. Wings with an indistinct brown cloud 

 along the front margin beginning beyond the end of the first vein 

 and continuing to that of the second, reaching into the first posterior 



