SYSTEMATIC ACCOUNT. 83 
Acrostichal hairs in six rows; no prescutellars. Mesonotum and scutellum dark dull 
yellowish-brown. Pleurz and legs pale yellowish-brown. Apical and preapical bristles on 
first and second tibise, preapicals on third. 
Abdomen shining yellow; an interrupted dark-brown band on the posterior margin of 
each of the first four segments, and a median anterior dark-brown spot on the third, fourth, 
and fifth segments. . 
Wings with faint clouds on each cross-vein and at the tips of second and third veins; 
veins dark brown. Costal index about 4.3; fourth vein-index about 1.7; 5x index about 
1.3; 4c index about 0.7. 
Length body 2.5 mm.; wing 2.7 mm. 
Specimens examined: New Orleans, Louisiana (P. Viosca); Kushla, 
Alabama (type material of modesta); Greenville, South Carolina; Rich- 
mond, Arlington, Dead Run (R. C. Shannon), Rosslyn (R. C. Shannon), 
Virginia; District of Columbia (type material); Plummer’s Island, Mary- 
land (R. C. Shannon); Bloomington, Indiana (F. Payne); Urbana, Illinois 
(J. R. Malloch); Riverton, New Jersey (C. W. Johnson). I have also 
reared the species from cabbage collected in New York City in November, 
but I am inclined to suspect that the cabbage was infected somewhere in 
the south before it was shipped to New York. 
I have reared this species in Alabama from banana, watermelon, sap 
from a bleeding grapevine, and an agaricaceous fungus. It is easily kept 
in the laboratory on banana. 
According to Dr. C. W. Metz, the eggs have four filaments. Dr. Metz 
has also described the chromosomes (see p. 39). 
Drosophila immigrans, new species. (Plate 3, fig. 1.) 
D. tripunctata Sturtevant. 1918. Bull. Amer. Mus. Nat. Hist., 38, 445. Not Loew, 
1862. Berlin. ent. Zeit., 6, 231. 
o. Arista with about six branches above and three below. Antenne yellow. Front 
over one-third width of head, wider above; yellow, ocellar dot dark brown. Second orbital 
one-fourth size of other two. Second oral bristle over one-half length of first. Carina 
broad, flat; face yellow. Proboscis yellow. Cheeks yellow; their greatest width about 
one-third greatest diameter of eyes. Eyes with rather thick pile. 
Acrostichal hairs in eight rows; no prescutellars. Mesonotum and scutellum dull 
brownish-yellow. Pleure and legs pale yellow. Apical and preapical bristles on first and 
second tibiz, preapicals on third. A row of very short, stout bristles on lower apical part 
of first femur. Basal joint of first tarsus about half as long as corresponding joint of middle 
leg, and thicker. Second tarsal joint of first leg also somewhat shortened and thickened. 
Abdomen dull yellow, each of the four basal segments with an interrupted posterior 
black band. The band on the fourth segment is sometimes entire. Fifth segment black. 
A single bristle at tip of first costal section (before distal break). Wings clouded at tips 
of first and second veins and on posterior cross-vein. Costal index about 4.4; fourth-vein 
index about 1.2; 5x index about 1.0; 4c index about 0.5. 
Length body 2.5 mm.; wing 2.7 mm. 
9. Same as above, except basal tarsal joint of first leg about two-thirds as long as 
corresponding joint of second leg, not thicker. Second joint of tarsus of first leg not 
shortened or thickened. 
Type (co) and gonotypes bred from stock collected at White Plains, 
New York, 1919. As in the case of D. hydei, the gonotypes are not de- 
scended from the type, but the whole type series is known to be descended 
from a single female. 
Other specimens examined: Woods Hole, Attleboro (H. H. Plough), 
New Bedford, Massachusetts; New York, Cold Spring Harbor, Staten 
Island (F. Schrader), New York; Fort Lee, New Jersey; Springfield, Ohio 
(W. S. Adkins); Arlington, Maryland (R. R. Hyde); Greenville, South 
Carolina; Lakeland (C. W. Metz), Daytona (B. B. Horton), Florida; 
Kushla, Alabama; New Orleans, Louisiana (C. W. Metz); Claremont, 
