102 THE NORTH AMERICAN SPECIES OF DROSOPHILA. 
The differences between this species and the two preceding ones that are 
available in living material are discussed under D. repleta. Its chromosomes 
are referred to on page 39. This form may be bred on banana. 
Drosophila ramsdeni Sturtevant. 1916. Ann. Ent. Soc. America, 9, 328. 
3, 9. Arista with about four branches above and two below. Antenne pale yellow, 
third joint reddish brown above. Front pale yellow, three brown spots on each orbit and 
one around each ocellus. Second orbital one-fourth size of other two. First orbital three 
times size of second. Carina large, broad, sulcate. Face and cheeks yellow, a brown spot 
just below carina and one just below each eye. Eyes pilose. 
Acrostichal hairs in eight rows; no prescutellars. Mesonotum light gray, each hair and 
bristle arising from a dark-brown spot. Between the dorsocentrals these spots are fused 
into a pair of irregular longitudinal stripes. Scutellum light gray, basal pair of bristles 
arising from brown spots. Pleura dark brown above, pale yellow below. Legs pale yellow, 
tips of femora and bases of tibie brown. Apical and preapical bristles on first and second 
tibiz, preapicals on third. 
Abdomen yellow, each segment with a dark-brown cross-band, which is broadly broken 
in the mid-dorsal line. 
Wings clear; veins pale brown, with dark-brown spots at tip of first vein and at junction 
of first and second veins. Costal index about 2.6; fourth-vein index about 2.0; 5z index 
about 1.2; 4c index about 1.1. 
Length body 2.5 mm.; wing 2.5 mm. 
Specimens examined: Guantanamo, Cuba (C. T. Ramsden, type ma- 
terial). 
This species has been bred from pineapple. 
The chromosomes, reported by Metz (1916, Amer. Nat., 50), are described 
on page 39. 
Drosophila alabamensis Sturtevant. 1918. Journ. N. Y. Ent. Soc., 26, 38. 
Arista with five branches above and one below. Antennz large, brown; third joint 
large, oval, dark. Front about one-half width of head, wider above; brown, triangle and 
orbits grayish. “Second” orbital over one-half other two, placed a trifle below third. 
Only one prominent oral bristle. Carina very small, confined to upper part of face; face 
light brown. Proboscis brown, palpi dark brown, large. Cheeks brown; their greatest 
width about one-third greatest diameter of eyes. Eyes with short pile. 
Acrostichal hairs in six rows; no prescutellar bristles. Mesonotum dull brown; humeri, 
median stripe, pair of stripes in dorsocentral rows, and posterior pair of stripes outside the 
latter and joining them at the suture, grayish. Scutellum brown, with grayish border. 
Pleure dull brown. Legs yellowish brown. Apical and preapical bristles on first and 
second tibix, preapicals on third. 
Abdomen dark dull brown. 
Wings clear. Costal index about 2.3; fourth-vein index about 2.3; 5x index about 2.0; 
4c index about 1.3. 
Length body 2.3 mm.; wing 2.5 mm. 
Specimen examined: Kushla, Alabama, April 9, 1915 (type). 
Drosophila bilineata Williston. 1896. Trans. Ent. Soc. London, 409. 
“7. Front of equal width, not widened above; opaque velvety black, the orbits and a 
slender median line opaque yellowish-grey. Face light yellow, on the sides above dusted 
like the frontal orbits. Cheeks and the dilated palpi black, the cheeks yellow behind. 
Face distinctly receding, carinate in the middle. Antennz brownish-yellow or brown, the 
third joint more than twice as long as wide; arista with about five rays above and three 
below. Occiput black above. Mesonotum and scutellum opaque deep-brown, the former 
with two narrow stripes, not reaching the hind margin, and appearing like continuations of 
the frontal orbits. Pleure light yellow. Abdomen oval, not elongate; opaque deep-brown 
or black, the fifth segment, except sometimes a small spot in the middle, the remainder of 
the abdomen [sic], and the narrow lateral margin of all the segments yellow. Legs light 
yellow. Wings greyish hyaline; ultimate section of the fourth vein not twice the length 
of the penultimate section. Length 13 mm. 
“Three specimens. St. Vincent.’ 
