410 Professor Williston on the 



brown in the middle ; strongly carinate. Mesonotum with three 

 inconspicuous whitish stripes in front. Scutellum black, brownish 

 pollinose in an oblique light. Pleurae nearly black. Abdomen 

 black or brownish-black. Legs luteous. Wings tinged with 

 brownish; ultimate section of the fourth vein not twice the length 

 of the penultimate section ; third section of the costal vein less 

 than half the length of the second section. Length 3-4 mm. 

 Numerous specimens. St. Yincent. 



7. Drosophila hellula, n. sp. 



$ , %. Front broader above ; the orbits yellowish, in the 

 middle a large truncated triangle brown, the inner portion of 

 which — the vertical triangle — lighter coloured, or yellow. Antennae 

 yellow, the base in the larger part of the short third joint blackish; 

 arista pectinate above and below. Face and cheeks yellow, the 

 former carinate. Mesonotum brown, with three greyish-yellowish 

 stripes, the middle one broader and more diffuse in front, narrow 

 behind. Scutellum brownish, yellowish on the borders. Pleurae 

 brown, with two slender yellowish stripes. Abdomen black or 

 dark brown, the segments with a more or less narrow yellowish 

 anterior border. Legs yellow. Wings yellowish hyaline ; second 

 section of the costa about three times the length of the third 

 section. Length 2 mm. 



Eight specimens. St. Yincent. 



8. Drosophila fasciola, n. sp. 



$ , ^ . Front broader above ;' the orbital margins yellowish (at 

 their lower part a brownish spot) ; two convergent brown stripes, 

 within which the vertical triangle is lighter coloured ; the front is 

 wholly opaque. Antennae yellowish ; the short third joint brown 

 at the base. Face yellowish, the thin median carina nose-like, not 

 appreciably sulcate. Cheeks brown. Mesonotum opaque greyish- 

 yellowish, with incomplete brown stripes and irregular spots ; in 

 the middle behind, the brown forms a large triangle, bisected by a 

 slender yellowish line. Scutellum opaque yellowish, brownish 

 towards its base ; the four bristles each arise from a small blackish 

 spot. Pleurae brown, yellowish vittate. Abdomen brown, the 

 segments yellow or yellowish in front. Wings yellowish hyaline ; 

 tip of the first section of the costa black ; third section of the 

 costa not one-half the length of the second section. Legs yellow ; 

 base of all the femora brown or blackish ; all the tibiae with a 

 proximal and distal brown riug. Length 2 mm. 



Five specimens. 



