80 THE NORTH AMERICAN SPECIES OF DROSOPHILA. 
Drosophila illota Williston. 1896. Trans. Ent. Soc. London, 415. 
““®. Yellowish or brownish-red, the abdomen brown or blackish, the legs yellow. 
Front as broad or broader than long, a little wider above, opaque brownish or ochraceous 
yellow, the ocellar tubercle blackish. Third joint of the antenne twice as broad as long, 
blackish; arista with two or three rays on the under side. Face more yellowish, in the 
middle with a strong obtuse carina, leaving a deep depression on each side in which is 
lodged the antennz. Palpi and proboscis yellowish. Mesonotum a little shining. Ab- 
domen more reddish toward the base. Wings with a brownish tinge; penultimate section 
of the fourth vein about one-half as long as the ultimate section; posterior cross-vein nearly 
as long as the ultimate section of the fifth vein; third section of the costa not half the 
length of the second section. Length 2} mm. 
“Two specimens. St. Vincent.” 
I have not seen this species, so have reproduced Williston’s description 
verbatim. I had suspected that D. cardini Sturtevant might be the same, 
so, through the kindness of Mr. C. G. Lamb, got Mr. E. E. Austen to 
compare a paratype of cardini with the type of illota, in the British Museum. 
He reports that the two species are quite distinct. 
Drosophila quinaria Loew. 1865. Berlin. ent. Zeit., 9, 182. 
3, 9. Arista with about five branches above and three below. Antenne yellow, 
third joint darker. Front about one-half width of head, wider above; yellow. Second 
orbital fine, about one-fourth length of other two. Second oral bristle three-fourths first. 
Carina broad and flat; face yellow. Cheeks yellow; their greatest width about one-third 
greatest diameter of eyes. Eyes with short, fine pile. 
Acrostichal hairs in six rows; no prescutellars. Mesonotum and scutellum shining 
reddish-yellow. Pleurz and legs yellow. Apical and preapical bristles on first and second 
tibiz, preapicals on third. 
Abdomen shining yellow, each segment with four triangular black dots on its posterior 
margin. In young specimens these spots are brown. 
Wings clouded at tips of second, third, and fourth veins and on each cross-vein. Costal 
index about 2.9; fourth-vein index about 1.5; 5x index about 1.1; 4c index about 0.9. 
Length body 2.2 mm.; wing 2.3 mm. 
Specimens examined: Montreal, Canada (C. W. Johnson coll.); Hanover, 
New Hampshire; Dummerston, Vermont (C. W. Johnson); Auburndale 
(C. W. Johnson), Chester (C. W. Johnson), Plymouth (C. W. Johnson), 
Woods Hole, Nantucket, New Bedford, Massachusetts; Buttonwoods, 
Rhode Island (C. W. Johnson); New Haven, Connecticut (C. W. Johnson) ; 
Ithaca (8S. W. Frost), Hague (Amer. Mus. Nat. Hist. coll.), Staten Island 
(F. Schrader), type locality (Osten Sacken), New York; Paterson, New 
Jersey; Plummer’s Island, Maryland (Schwarz and Barber); Falls Church, 
Virginia (N. Banks); New Galilee (H. Kahl), Philadelphia (C. W. Johnson), 
Pennsylvania; Medina, Ohio (U. 8. Nat. Mus. coll.); La Fayette, Indiana 
(J. M. Aldrich). It is quite possible that some of these specimens may be 
really D. transversa Fallén, but there can be little doubt that D. quinaria 
covers the range indicated by these records. In addition to these specimens, 
there are a few that I have identified as being probably D. quinaria, but 
about which I am not certain. If they really represent this species, its 
range is considerably wider than that indicated above. These specimens 
are as follows: Moscow Mountain, Idaho (A. L. Melander); Mount 
Constitution, Washington (A. L. Melander); Eureka, California (H. S. 
Barber); Beulah, New Mexico (T. D. A. Cockerell); Austin, Texas (W. M. 
Wheeler). 
This species is very similar to D. transversa Fallén. Pinned material 
may usually be distinguished from that species by the clouded tips of the 
longitudinal veins and the larger and more definite clouds on the cross-veins. 
The cy a is also shinier and more reddish here. Plate 1 and figures 
35 and 40. 
