SYSTEMATIC ACCOUNT. 51 



captures. All records not credited to another collector, from the 

 following localities, are from specimens that I have taken : 



Hanover, Nashua, New Hampshire; Monument Beach, Woods 

 Hole, Nantucket, Siasconset, New Bedford, Fall River, Massachusetts; 

 Bear Mount, New York, Staten Island, Cold Spring Harbor, New York; 

 Fort Lee, Pater son, Split Rock Pond, New Jersey; Washington, 

 District of Columbia ; Arlington, Richmond, Virginia; Camp Jackson, 

 Greenville, South Carolina; Tampa, Miami, Key West, Florida; 

 Gulf crest, Kushla, Mobile, Alabama; Havana, San Antonio de los 

 Banos, Santiago de las Vegas, Guareiras, Aguada Pasajeros, Cuba; 

 San Jose, Port Limon, Costa Rica; Panama, Republic of Panama. 



Dr. C. W. Metz was with me at Cold Spring Harbor and at all the 

 Cuban localities except San Antonio de los Banos. The specimens 

 collected at these places represent our joint efforts. 



The type specimens of all the new species described in this paper 

 are deposited in the American Museum of Natural History. Most 

 of the paratypes and gonotypes are in the author's own collection. 



Aulacigaster Macquart. 1835. Smt. Buff., 2, 579. 



The European species of this genus was referred to the ephydrine genus 

 Notiphila by Fallen, and to the geomyzine genus Diastata by Meigen. 

 Schiner placed the genus in the Drosophihdse, though admitting that it 

 might easily be placed in the Geomyzidse or Ephydridse. WilHston referred 

 it to the Agromyzidse, but mentioned it under the Drosophilidse. Becker, 

 Melander, and Oldenberg all place it among the Drosophilinae. The genus 

 is aberrant here, but may be left in the subfamily as a matter of convenience, 

 since it does not fit well in any of the other recognized subfamilies. 



Arista pubescent; third antennal joint orbicular; two large oral bristles; two orbitals; 

 no ocellars or postverticals; one humeral; no presutural; two notopleurals; mesopleurse 

 bristly; one sternopleural; two dorsocentrals; two acrostichal rows; one supra-alar; no 

 postalar; no prescutellars; two pairs of scutellars; costa twice broken; auxiliary reaches 

 costa, but is fused with the first vein for a short distance; discal and second basal cells 

 confluent; anal cell and vein present; no evident preapicals. Three chitinized sperma- 

 thecse, in which respect the form differs from Drosophila, Scaptomyza, Chymomyza, Leuco- 

 phenga, and Mycodrosophila, in all of which only two spermathecae are present. 



There is a single described species, common to Europe and the United 

 States. In Europe it has been recorded from Scotland and Sweden to 

 France, Italy, and Hungary. Williston (1908, Manual N. Amer. Dipt., 

 p. 293) has recorded a species from the West Indies, but this form has 

 never been described, and it is not certainly known whether it represents a 

 second species or not. Our only species is Aulacigaster leucopeza Meigen 

 (1830, Syst. Beschr., 6, 100, as Diastata) = Aulacigaster rufitarsis Macquart 

 (1835, Suit. Buff., 2, 580). 



Specimens examined: Hungary (Kertesz det.); Italy (Bezzi det.); 

 Hanover, New Hampshire; Woods Hole, Norwood (W. Reiff), Massa- 

 chusetts; Ithaca, New York (H. Morrison); Pittsburgh, Pennsylvania 

 (H. Kahl); La Fayette, Indiana (J. M. Aldrich); Flat Rock (F. N. Dun- 

 can), Carlinville (U. S. Nat. Mus. coll.), Illinois; Marlboro (H. S. Barber), 

 Plummer's Island (W. L. McAtee), Maryland; Washington, District of 

 Columbia (U. S. Nat. Mus. coll.); Dead Run, Virginia (R. C. Shannon); 

 Kushla, Alabama. 



