1916] North American Drosophiltdce 339 



Drosophila putrida, n. sp. 



cf . Arista with five or six branches above and two below. Antemias 

 yellow brown, third joint dark reddish brown. Front nearly one-third 

 width of head, wider above; yellow brown, dull; ocellar dot darker. 

 Second orbital minute. Second oral bristle nearly as long as first. 

 Carina low, rather broad, flat; face yellow brown, somewhat shmy. 

 Cheeks yellow, about one-eighth as wide as greatest diameter of eyes. 

 Eyes with fine light yellow pile. 



Six acrostichal rows; no prescutellar bristles; a pair of presutural 

 bristles in the acrostichal rows next to the outer ones. Dorsurn ot 

 thorax and scutellum shining yellow. leurse and legs pale yellow. 

 Apical and preapical bristles on first and second tibiae, preapicals. 



on third. . , , , . .. • 



Abdomen pale yellow, each segment with a brown band on posterior 



margin, interrupte 1 in the median dorsal line. 



Wings clear. Postal index about 2.8; 4th vein index about 1.6; 



5x index about l.L' 4c index about 0.8. 

 Length body '. .nm., wings 2mm. 



Type and paratypes, Woods Hole, Mass. Specimens exam- 

 ined from Vermont, Connecticut, Rhode Island, New York, 

 New Jersey, Pennsylvania, Illinois, Virginia, North Carolina, 

 Georgia, Alabama and Mississippi. The female agrees with 

 the above description. The species is very common on fungi, in 

 which it breeds. 



Easily distinguished from all other members of the genus 

 known to me by the presence of the presutural acrostichal pair 

 of bristles. Some specimens are more brownish than the type. 



Drosophila florae, n. sp. 



d^. Arista with four branches above and three below. Antennae 

 dull brown, third joint darker. Front about one-third width of head, 

 wider above; dull yellowish brown. Second orbital one-half other 

 two. Second oral bristle about one-third first. Carina broad, flat; 

 face dull yellow brown. Cheeks yellow; their greatest width about one- 

 eighth greatest diameter of eyes. Eyes with fine black pile. 



Eight acrostichal rows; prescutellars well developed. Dorsum of 

 thorax, scutelltim and pleurae dull brown. Legs pale brown; apical and 

 preapical bristles on first and second tibiae, preapicals on third. 



Abdomen dark brown, basal segment with a yellowish brown trans- 

 verse band. . . -, i .l i n 



Wings clear; costal index about 2.5; 4th vein index about L8; 

 5x index about 1.4; 4c index about 1.0. 



Length body 2Xmm., wings 2>^mm. 



Type and paratypes, Havana, Cuba, January and February, 

 1915. Specimens have been examined from Guareiras, Cuba; 



