Dipfera of St. Vincent (West Indies). 417 



their tips not twice as groat as that between the tips of the fourth 

 and third veins. 



$ . Second, third, and fourth joints of the front tarsi dilated, 

 the first joint stout ; the whole tarsi and the tip of the tibiae 

 blackish. 



Length 2 mm. 



Five specimens. St. Yincent. I refer this species 

 with some doubt to the present genus^ as it does not 

 have the typical markings of Phortica. There is a com- 

 plete posterior basal cell ; otherwise the species resemble 

 those of Drosophila. The oral vibrissse are weak. 

 The bristles of the front are strong and reach nearly 

 to the oral margin; there is no preapical bristle to the 

 hind tibiae. 



OSCINIDJE. 

 Elachtptera. 



Macquart^ Hist. Nat. Dipt. Suites a Buffon, ii., 621, 

 1835 ; Grassisefa, Von Roser, Verh. Wurtt. Dipt. 

 Nachtrag, 1840. 



1. ElacMptera flavida, n. sp. 



(^ , $ . Light reddish colour, the arista black, and the legs 

 more purely yellow. Vertical triangle large, reaching nearly to 

 the root of the antennae, shining. Head usually a purer yellow 

 than the mesonotum and abdomen. Mesonotum shining. Scu- 

 tellum trapezoidal, with two moderate- sized bristles on the angles. 

 Abdomen of some specimens brownish, probably from desiccation. 

 Wings hyaline, with a slight yellowish tinge ; third section of 

 the costal vein only a little shorter than the second. Length 

 2-2^ mm. 



Ten specimens. St. Yincent. 



HlPPELATES. 



Loew, Centur., iii., 67, 1863. 



1. Proboscis elongate, folding backwards {Siphomyia) ... 2 

 Proboscis not elongate .'5 



2. Thorax black, thinly greyish dusted. . . proboscideus, n. sp. 

 Thorax yellow, the mesonotum, except on the sides and 



behind, black, thickly yellowish dusted . dorsatus, n. sp. 



