Biptera of St. Vincent (West Indies). 415 



the middle of the first posterior cell ; behind, the win^ is dis- 

 tinctly lighter coloured, but not hyaline ; on the posterior cross- 

 vein there is an indistinct cloud ; third section of the costal vein 

 about one-third the length of the second section. Length 2 mm. 



Twelve specimens. St. Yincent. 



20. Drosophila pallid a ^ n. sp. 



^ , 5 . Yellow, not shining, the mesonotum light reddish- 

 yellow and a little shining ; face obtusely carinate above, not 

 nose-like. Abdomen reddish-yellow, with a narrow brownish 

 posterior border to the segments. Front broad, broader above. 

 Wings distinctly yellowish ; second section of the costal vein fully 

 twice the length of the third section. Length 1| mm. 



Twelve specimens. St. Yincent. In most of the 

 specimens the narrow brown bands of the abdomen are 

 visible^ but in some the whole abdomen is brown. The 

 penultimate section of the fourth vein is very nearly equal 

 to one-half the length of the ultimate section. A single 

 female specimen agrees in other respects but has the 

 third costal section about three-fourths the length of the 

 second section and the penultimate section of the fourth 

 vein not more than one-third the length of the ultimate 

 section. 



21. Drosophila similis, n. sp. 



^ , $ . Yery much like D. pallida, but is larger, and the 

 third section of the costal vein is very short, not longer than the 

 penultimate section of the fourth vein. The second and third 

 veins are parallel through nearly their whole length, and the second 

 vein is unusually long. In most of the specimens the abdomen is 

 brown, but in some there are black or brown bands as in D. pallida. 

 The colour is reddish-yellow, sometimes more purely yellow. 

 Length 2-2| mm. 



Numerous specimens. St. Yincent. 



22. Drosophila illota, n. sp. 



5 . Yellowish or brownish-red, the abdomen brown or blackish, 

 the legs yellow. Front as broad or broader than long, a little 

 wider above, opaque brownish or ochraceous yellow, the ocellar 

 tubercle blackish. Third joint of the antennae twice as broad as 

 long, blackish ; arista with two or three rays on the under side. 



