80 THE NORTH AMERICAN SPECIES OF DROSOPHILA . 



Drosophila illota Williston. 1896. Trans. Ent. Soc. London, 415. 



" 9 ■ Yellowish or l)ro\vninh-re(l, 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 ooellar tubercle blackish. Third joint of the antennae 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 antenna*. Palpi and proboscis yellowish. Mesonotum a little shining. Ab- 

 domen more reddi.sh 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 5 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. 



cT, 9 . Arista with about five branches above and three below. Antenna; 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 ej^es. Eyes with short, fine pile. 



Acrostichal hairs in six rows; no prescutellars. Mesonotum and scutellum shining 

 reddish-yellow. Pleurae and legs yellow. Apical and preapical bristles on first and second 

 tibiae, preapicals on tliird. 



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.; wdng 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; Button woods, 

 Rhode Island (C. W. Johnson) ; New Haven, Connecticut (C. W. Johnson) ; 

 Ithaca (S. 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. S. Nat. Mus. coll.); La Fayette, Indiana 

 (J. M. Aldrich). It is quite possible that some of these specimens may be 

 really D. transversa Fallen, 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 Fallen. 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 mesonotum is also shinier and more reddish here. Plate 1 and figures 

 35 and 40. 



