Diptera of St. Vincent {West Indies). 445 



2. Anthomyza xanthopoda, n. sp. 



J, $. Front narrower than in A. cinerea, narrowest below; 

 red, the vertical margin brownish ; on either side the vertical 

 margin is white, and bears the outer row of short bristles. 

 Antennae yellow ; arista bare. Face and cheeks light-yellow, 

 the latter scarcely more than one-third as wide as the vertical 

 diameter of the eyes. Thorax black in ground-colour, thickly 

 ashy-grey pollinose, with a shade of yellowish on the mesonotum ; 

 hair of the mesonotum bristle-like. Abdomen black, greyish 

 pruinose, opaque ; rather slender in the male, the hypopygium pro- 

 tuberant ; all the segments with a narrow yellowish or whitish hind 

 border ; hair short, wholly black. Legs yellow ; last joint of all 

 the tarsi brown ; bristles of front femora not conspicuous. Pro- 

 boscis and wings as in A . cinerea. Length 2-2|- mm. 



Three specimens. The species is readily distinguish- 

 able from A. cinerea by the narrower front and cheeks, 

 the less densely pollinose thorax, black hair of the 

 abdomen, &c. 



In addition to the foregoing species listed or described 

 from the island of St. Vincent, there are, among the 

 specimens submitted to me, about twenty others, the 

 systematic positions of which are yet more or less 

 doubtful. Several of them will probably require the 

 erection of new genera for their reception. The descrip- 

 tions will be given in a later paper, in connection with the 

 report upon the Grenada Diptera now in my hands for 

 study. 



The present collection of Diptera is the first one of any 

 extent that has been studied from the West Indian Islands. 

 Isolated species, or small collections, chiefly of the larger 

 forms, have been studied by various authors, but no col- 

 lection has ever represented nearly so fully the microfauna 

 as does the present one. The West Indian Diptera-fauna 

 is essentially a common one, with a strong South American 

 facies. Very few of the species, I believe, will be found 

 restricted to any single island or group of islands. But 

 comparatively few of the species will be found to occur in 

 North America, and they for the most part are either 

 species of wide-spread habitats, or else are confined to 



TRANS. ENT. SOO. LOND. 1896. PAKT JIT. (SEPT.) 30 



