82 THE NORTH AMERICAN SPECIES OF DROSOPHILA. 



shiny. Checks yellow; their greatest width about one-eighth greatest diameter of eyes. 

 Eyes with fine pale pile. 



Acrosticlial hairs in six rows; no prescutellars; a pair of presutural bristles in the acro- 

 stichal rows next to the outer ones. Mesonotum and scutellum shining brownish yellow. 

 Pleura? and legs pale yellow. Apical and preapical bristles on first and second tibiae, pre- 

 apicals on third. 



Abdomen pale yellow, each segment with a brown band on posterior margin, inter- 

 rupted in the mid-dorsal line. 



Wings clear. Costal index about 2.8; fourth-vein index about 1.6; 5x index about 1.2; 

 4c index about 0.8. 



Length body 2 mm.; wing 2 mm. 



Specimens examined: Princeton (Aldrich coll.), Machias (C. W. John- 

 son), Maine; Button woods (C. W. Johnson), Hanover, New Hampshire; 

 Brattleboro, Vermont (C. W. Johnson); Chester (C. W. Johnson), Woods 

 Hole (type material), Monument Beach, New Bedford, Massachusetts; 

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

 (C. W. Johnson); Niagara Falls (C. W. Johnson), New York, Cold Spring 

 Harbor, New York; Riverton (C. W. Johnson), Ocean County (C. W. 

 Johnson), Fort Lee, New Jersey; Philadelphia (C. W. Johnson), Ohio Pyle 

 (H. Kahl), Pittsburgh (H. Kahl), Pennsylvania; Cheat Mountains, West 

 Virginia (H. Kahl); Plummer's Island (R. C. Shannon), Chain Bridge 

 (R. C. Shannon), Maryland; Brookland, District of Columbia (R. C. 

 Shannon); Dead Run (R. C. Shannon), Falls Church (N. Banks), Rich- 

 mond, Virginia; Bloomington, Indiana (F. Payne); Flat Rock (F. N. 

 Duncan), Algonquin (D. W. Coquillett), Illinois; Coal Creek, Tennessee 

 (W. S. Adkins); Greenville, South Carolina; Tifton, Georgia (A. L. Me- 

 lander coll.); Kushla, Alabama;' West Point, Mississippi (H. S. Barber). 

 There are specimens from New York in the Loew collection. 



The species is very common about fleshy fungi, in which it breeds. I have 

 also reared it from potato, and it can be kept on this food in the laboratory. 

 It is, however, not very satisfactory as a laboratory animal, since it does 

 :not breed freely under any conditions that I have been able to supply. 



The eggs have four filaments. 



Drosophlla melanderi Sturtevant. 1916. Ann. Ent. Soc. America, 9, 337. 



9 . Arista with about five short branches above and one below. Antennae yellow, 

 third joint reddish brown. Front nearly one-half width of head; reddish yellow, triangle 

 brown. Second orbital about one-fifth other two. One bristle and numerous hairs on oral 

 margin. Carina low, flat, and narrow; face yellow. Cheeks yellow; their greatest width 

 about one-fourth greatest diameter of eyes. Eyes with fine pale pile. 



Acrostichal hairs in six rows; no prescutellars. Two large humeral bristles. Meso- 

 notum and scutellum somewhat sliining reddish yellow. Pleurae reddish yellow. Legs 

 yellow\ Apical and preapical bristles on first and second tibiae, preapicals on third. 



Abdomen dull yellow, each of first four segments with an interrupted posterior dark- 

 brown band. 



Wings clear, veins brown. Costal index about 3.0; fourth-vein index about 1.3; 5x 

 index about 1.1; 4c index about 0.7. 



Specimens examined: Tacoma, August 27, 1911 (A. L. Melander, types), 

 Mount Constitution (A. L. Melander), Washington. 



Drosophila tripunctata Loew. 1862. Berlin, ent. Zeit., 6, 231. 



jD, modesta Sturtevant. 1916. Ann. Ent. Soc. Amer., 9, 338. 

 6^, 9 . Arista with about six branches above and three below. Antennae pale brown, 

 third joint dark. Frontover one-third width of head, wider above; opaque yellow. Second 

 orbital about one-fifth other two. Second oral bristle nearly as long as first. Carina broad, 

 flat; face brownish yellow. Cheeks yellow; their greatest width scarcely equal to one-sixth 

 greatest diameter of eyes. Eyes with yellow pile. 



