SYSTEMATIC ACCOUNT. 95 



than a hair. Second oral bristle two-thirds size of first. Carina flat, rather narrow. Face 

 narrow, brown. Palpi brown, with several prominent bristles. Cheeks brown; their 

 greatest width about one-sixth greatest diameter of eyes. Eyes with short pile. 



Acrostichal hairs in six rows; no prescutellars. Mesonotum and scutellum dull blackish- 

 brown. Pleurae brown. Legs pale yellowish-brown. Apical and preapical bristles on 

 first and second tibiae, preapicals on third. 



Abdomen shining dark brown, basal segments with fighter median dorsal and anterior 

 fines. 



Wings clear, veins brown. Costal index about 4.0; fourth-vein index about 1.8; 5x 

 index about 1.3; 4c index about 0.7. 



Length body 1.5 mm.; wing 1.7 nam. 



Specimens examined: Cabin John Bridge, Maryland, March 1914 (R. C. 

 Shannon); Dead Run, Virginia, April 1914 (R. C. Shannon, type material). 



Drosophila melanissima Sturtevant. 1916. Ann. Ent. Soc. America, 9, 333. 



d^, 9. Arista with about four branches above and two below. Antennae velvety 

 black. Frontaboutone-half width of head, wider above; blackish brown, velvety. Second 

 orbital about one-third other two. Second oral bristle less than one-fourth first. Carina 

 broad, sfightly sulcate below; face black. Several prominent palpal bristles. Cheeks 

 brownish black; their greatest width about one-third greatest diameter of eyes. Eyes 

 with short, thick black pile. 



Acrostichal hairs long, in six rows; no prescutellars. Mesonotum, scutellum, and pleurae 

 brownish black; there is a faint grayish polfinose fine extending from the base of the first 

 coxa to the base of the haltere. Legs blackish brown. Apical and preapical bristles on 

 first and second tibiae, preapicals on third. 



Abdomen dark blackish brown, sUghtly pofished. 



Wings slightly brownish, veins brown. Costal index about 4.0; fourth-vein index about 

 1.7; 5x index about 1.1; 4c index about 0.7. 



Length body 2 mm.; wing 2.2 mm. 



Specimens examined: North Carolina (U. S. Nat. Mus.); Georgia (U. S. 

 Nat. Mus.); Biscayne Bay, Florida (Mrs. Slosson); Kushla, Alabama 

 (type). 



As I have stated elsewhere (1918, Journ. N. Y. Ent. Soc, 26, 38), I found 

 this species in large numbers about moist sawdust made from a living pine 

 tree by a boring beetle, in Alabama, October 1916. Efforts to breed it 

 were not successful, but there can be little doubt that the flies were breeding 

 on this sawdust. 



But for the broader cheeks, smaller eyes, and larger oral opening, this 

 species might be considered as a dark-colored race of D. melanica Sturtevant. 



Drosophila melanica Sturtevant. 1916. Ann. Ent. Soc. America, 9, 332. (Plate 3, fig. 3.) 



d', 9 . Arista with about four branches above and two below. Antennae dark brown, 

 second joint grayish above. Front over one-third width of head, wider above; blackish, 

 velvety, orbits and narrow triangle brown. Second orbital about one-third size of other 

 two. Second oral bristle less than one-fourth first. Carina broad, slightly sulcate; face 

 blackish brown, dufi. Several prominent palpal bristles. Cheeks brown; their greatest 

 width about one-sixth greatest diameter of eyes. Eyes with short, thick black pile. 



Acrostichal hairs long, in six rows; no prescuteUar bristles. Mesonotum dull blackish- 

 brown, a small indistinct pair of brown spots on anterior margin, just inside of dorso- 

 central fines. Humeri grayish brown. Scutellum and pleurae dark dull blackish-brown. 

 Legs, including coxae, pale brown. Apical and preapical bristles on first and second tibise, 

 preapicals on third. 



Abdomen yellow, with a pair of lateral dark-brown fasciae on each segment. 



Wings clear, veins brown. Costal index about 3.3; fourth-vein index about 1.7; 5x 

 index about 1.0; 4c index about 0.8. 



Length body 2 mm.; wing 2.2 mm. 



Specimens examined: Mount Washington, New Hampshire (Mrs. Slos- 

 son); Plymouth (C. W. Johnson), Woods Hole, Massachusetts; Kmgston, 



