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. Pleure brown. Legs pale yellowish-brown. Apical and preapical bristles on 
first and second tibiz, preapicals on third. 
Abdomen shining dark brown, basal segments with lighter median dorsal and anterior 
lines. 
Wings clear, veins brown. Costal index about 4.0; fourth-vein index about 1.8; 5z 
index about 1.3; 4c index about 0.7. 
Length body 1.5 mm.; wing 1.7 mm. 
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. 
o, @. Arista with about four branches above and two below. Antenne velvety 
black. Front about one-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, slightly suleate 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 pleure 
brownish black; there is a faint grayish pollinose line 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 tibiz, preapicals on third. 
Abdomen dark blackish brown, slightly polished. 
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. 
ee 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.) 
o, @. Arista with about four branches above and two below. Antenne 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, dull. 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 prescutellar bristles. Mesonotum dull blackish- 
brown, a small indistinct pair of brown spots on anterior margin, just inside of dorso- 
central lines. Humeri grayish brown. Scutellum and pleure dark dull blackish-brown. 
Legs, including cox, pale brown. Apical and preapical bristles on first and second tibiz, 
preapicals on third. 
Abdomen yellow, with a pair of lateral dark-brown fasciz# on each segment. 
Wings clear, veins brown. Costal index about 3.3; fourth-vein index about 1.7; 5z 
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; Kingston, 
