64 THE NORTH AMERICAN SPECIES OF DROSOPHILA. 



The Palaearctic forms have been tabled and discussed by Beckel- (1908, 

 Mitt. zool. Mils., 4). The four North American forms may be separated 

 by the following key: 



1. Four acrostichaJ rows in front of the suture; usually with a dark spot at tip of 



' third vein 2 



Two acrostichal rows; wings unspotted 3 



2. Two large humerals terminalis 



One large humeral adusta 



3. Dark brownish, poUinose on mesonotum; palpi yellow graminum 



Yellowish, not polhnose; palpi dark vittata 



Scaptomyza terminalis Loew. 1863. Berl. ent. Zeit., 7, 32 (as Drosophila). 



Drosophila apwata Thomson. 1868. Eugen. Resa., 597. 



Specimens examined : Sitka, Alaska (Loew's type) ; Mount Constitution, 

 Vashon, Winlock, Washington (A. L. Melander); Moscow Mountain, 

 Idaho (A. L. Melander); Claremont, San Mateo County (Baker), Muir 

 Woods (J. C. Bradley), Eureka (H. S. Barber), Palo Alto^J- M. Aldrich), 

 California; Kaslo, British Columbia (R. P. Currie); Vancouver; Mount 

 Washington, New Hampshire (Mrs. Slosson); Eastport, Maine; Montreal, 

 Quebec (Melander collection); Middletown, New York (C. R. Crosby, 

 "from cabbage"). This species is extremely variable in size, color, and 

 wing-markings. There may be more than one species included. This 

 species is very close to the published descriptions of S. unipunctum Zetter- 

 stedt, from northern Europe, and may be identical with it. 



Scaptomyza adusta Loew. 1862. Berlin ent. Zeit., 6, 231 (as Drosophila). (Plate 2, 

 fig. 1.) 



Specimens examined: Hanover, New Hampshire; Norwich, Vermont; 

 Monument Beach, Woods Hole, Nantucket, Fall River, New Bedford, 

 Massachusetts; Cold Spring Harbor, New York, Staten Island, New York; 

 'New Brunswick, New Jersey; Bloomington, Indiana (F. Payne); Flat 

 Rock (F. N. Duncan), Algonquin (D. W. Coquillett), Illinois; Lawrence, 

 Kansas (E. S. Tucker); Colorado Springs (E. S. Tucker), Boulder (T. D. A. 

 Cockerell), Colorado; Cabin John Bridge, Plummer's Island, Maryland 

 (R. C. Shannon); Washington, District of Columbia; Dead Run (R. C. 

 Shannon), Arlington, Richmond, Virginia; Greenville, South Carolina; 

 Lakeland (C. W. Metz), Tampa (C. W. Metz), Biscayne Bay (Mrs. Slosson), 

 Florida; Gulf crest, Kushla, Alabama; Opelousas, Louisiana (Melander 

 collection); Austin, Texas (W. M. Wheeler). Recorded from Bermuda by 

 Johnson. 



Scaptomyza graminum Fallen. 1823. Dipt. Suec. Geomyz., 8 (as Drosophila). 



Drosophila flavipennis Zetterstedt and D. sordida Zetterstedt. 



Specimens examined: Germany (U. S. Nat. Mus.); Hanover, Isle of 

 Shoals, Mount Washington (Mrs. Slosson), New Hampshire; Norwich, 

 Vermont; Monument Beach, Nantucket, Woods Hole, Fall River, Massa- 

 chusetts; Cold Spring Harbor, Staten Island, Ithaca (S. W. Frost), New 

 York; Fort Lee, Paterson, New Jersey; Cabin John Bridge, Plummer's 

 Island, Chesapeake Beach, Maryland (R. C. Shannon); Rock Creek, 

 District of Columbia; Dead Run (R. C. Shannon), Great Falls (N. Banks), 

 Arlington, Richmond, Virginia; West Virginia; Bloomington, Indiana 

 (F. Payne) ; Chicago, Illinois (Melander collection) ; Clarksville, Tennessee 

 (U. S. Nat. Mus. coll.); Greenville, South Carolina; Kushla, Alabama; 

 Opelousas, Louisiana (Melander collection); Lakeland, Florida (C. W. 

 Metz); College Station, Texas (U. S. Nat. Mus.); Lawrence, Kansas (E. S. 

 Tucker); Potlatch, Idaho (J. M. Aldrich); Almota, Pullman, Washington 



