Biptera of 8t. Vincent (West Indies). 405 



ptrata, Scop., botli European, and both said to occur in 

 North America, by Loew. In the descriptions of 8. 

 coleoptrata, to which species the above seems closely 

 allied, no mention is made of the peculiar male tarsi. 



2. Stegana horse, n. sp. (PI. XIII., fig. 150, antenna 



of ?.) 



5 . Front narrower above than in S. tarsalls ; yellow, with 

 a broad, black, hour-glass-shaped stripe reaching nearly to the root 

 of the antennae. Antennae yellow ; third joint except the upper 

 basal portion, black, rather longer than in S. tarsalls. Face yellow; 

 cheeks black below the eyes. Proboscis yellow ; palpi black. 

 Occiput OQ the lower portion, yellow. Mesonotum and scutellum 

 deep brown, almost black ; a large spot on the humeri light-yellow. 

 Pleurae light-yellow with a horizontal black stripe, connected with 

 the black of the mesonotum near the root of the wings ; below 

 this stripe there is a narrow yellow one above the black or dark- 

 brown coxae. Abdomen black. Legs deep brown, the knees, the 

 tip of all the tarsi, the basal portion of the four posterior tibiae, and 

 all the tarsi light-yellow ; tarsi less compressed than in S. tarsalis ; 

 middle tibiae with a row of bristles on the outer side ; front 

 femora with a few long bristles near the outer end. Wings as in 

 S. tarsalis. Length 3 mm. 



Two specimens. St. Vincent. 



Drosophila. 

 Fallen, Dipt. Suec, Geomyzid., 4, 1823. 



The present collection includes, as is seen, a very large 

 number of species belonging to this genus. I have 

 scrutinized them with the utmost care, and have given, I 

 trust, descriptions which will enable them to be recog- 

 nized again. I have been able to recognize but a single 

 species previously described, though it is possible that 

 there may be others which have been already named. 

 The difficulty in the determination of the obscurer 

 coloured species from remote localities, is, however, so 

 great that only a direct comparison of specimens from dif- 

 ferent habitats will settle the questiou of their identity. 

 Two species are included in the list (Nos. 17 and 18) 

 which may not properly belong to the genus, but which 

 would in all probability be sought for here. 



