1916] North American Drosophilidce 335 



The species may be separated from D. melanogaster Meig. on 

 the basis of its color and its six acrostichal rows {D. melano- 

 gaster has eight). D. obscura Fall, also has eight rows and has 

 combs on the second tarsal joints of the front legs of the male, 

 as well as on the first. The females may be confused with 

 D. melanica, n. sp., but the narrow carina will serve to identify 

 them as D. affinis. Most of the material that has passed as 

 D. confusa Staeg. in this country belongs to D. affinis. 



Drosophila caribea, n. sp. 



cf . Arista with five branches above and three below. Antennee yel- 

 low, third joint brownish. Front nearly one-half width of head, wider 

 above; reddish yellow. Second orbital about one-third other two. 

 First oral bristle one and one-half times second. Carina rather broad, 

 flat. Face, cheeks and proboscis yellow. Greatest width of cheeks 

 less than one-sixth greatest diameter of eyes. Eyes thickly set with 

 short yellow pile. 



Acrostichal hairs in eight rows; no prescutellar bristles, although 

 there is a transverse row of about four slightly enlarged hairs between 

 the posterior pair of dorsocentrals. Dorsum of thorax, scutellum and 

 pleurag dull reddish yellow. Legs pale yellow. Apical and preapical 

 bristles on first and second tibiae, preapicals on third. 



Abdomen brownish yellow, each segment with an indistinct dark 

 brown posterior margin. 



Wings clear. Costal index about 1.5; 4th vein index about 2.4; 

 5x index about 2.0; 4c index about 1.6. 



Length body about 2mm., wings 2}iv!\va. 



Type and eleven paratypes, Havana, Cuba, 1915. Other 

 specimens have been examined from Santiago de Cuba, Santiago 

 de las Vegas, Guantanamo, Herradura, Baracoa, Cuba; Sanchez, 

 R. Dom.; Mayaguez, P. R. ; Antigua; Roseau, Dominica; 

 Manaos, Brazil; Panama, R. P.; San Jose, Costa Rica; Punta 

 Gorda, Br. Honduras. This form is quite common in Cuba 

 and Central America, about fruit, on which it breeds. It 

 is also attracted to excrement. 



The species is similar to Drosophila melanogaster Meig., but 

 it may be recognized by the absence of tarsal combs in the male, 

 paler abdomen, and higher costal and 4c indices. From 

 D. willistoni nom. nov. it may be distinguished by the eight 

 acrostichal rows {D. willistoni has only six), duller color and 

 stouter shape. 



