Biptera of St. Vincent {West Indies). 371 



Face, cheeks and occiput of the same colour or lighter. Antennae 

 pure light yellow ; arista bare, slender, yellow at its base. Thorax 

 everywhere densely light-grey pollinose, but with a bluish tint as 

 though from the black ground-colour ; mesonotum with a median 

 brown stripe. Abdomen yellow, the distal segments brownish or 

 blackish ; in shape elongate ovate and not flattened. Legs wholly 

 yellow. Wings tinged with yellowish ; penultimate section of the 

 fourth vein not longer than the posterior cross- vein. Length 6 mm. 



$ . Mesonotum with three brown stripes. Antennse darker, the 

 third joint in part brownish. Abdomen darker, the second and 

 following segments each with a pair of small rounded spots, and a 

 median brownish stripe. Hind tarsi brownish. 



Numerous specimens. St. Vincent. 



2. Coenosia insularis, n. sp. (PL XII., figs. 123, head 

 of S ; 123a, wing.) 



^ . Front opaque golden yellow, a little less than one-third of 

 the width of the head, and of nearly equal width. AntenuEe 

 black ; arista finely pubescent. Face yellowish-grey. Cheeks be- 

 low the eyes rather narrower than the width of the third joint of 

 the antennte. Occiput swollen below ; greyish pollinose, the orbits 

 yellow. Mesonotum densely light grey pollinose, with two broad, 

 dark coffee-brown stripes extending on the sides of the scutellum, 

 the latter with a median, light coloured stripe, extending from the 

 mesonotum. Pleurae greyish pollinose. Abdomen cylindrical, only 

 a little broader at the base ; shining brownish-black with the an- 

 terior angles of the segments broadly grey pollinose ; covered with 

 recumbent hairs, and with a slender lateral bristle on each 

 segment. Legs black ; the knees and coxae in front (beneath the 

 pollen) yellowish. Wings tinged with pale-brown. Tegulae nearly 

 white, the under one projecting beyond the upper. Halteres yellow. 

 Palpi black. Length 6-7 mm. 



Numerous specimens. St. Vincent. The abdomen in 

 the female is elliptical. 



MICROPEZID^. 



Tanypeza. 

 Fallen, Dipt. Suec. Opomyz., 4, 1820. 



1. Tanypeza claripennis. (PI. XII., figs. 124, head of $ ; 

 124(Z, wing.) 



Tanypeza claripennis, Schiner, Reise der Novara, Dipt., 

 247.— Brazil. 



