NO. 1198. DIPTEEA FEOM PVERTO EICO—COQUILLETT. 267 



OSCINIS NANA Williston. 



Mne specimens, collected at Mayaguez, Utuado, and Aguadilla in 

 January, and Arroyo and Vieques Island iu February. Originally 

 described from St. Vincent, West Indies. ♦ 



OSCINIS UMBROSA Loew. 



Nine specimens, taken at Mayaguez, Bayamon, Utuado, and i^gua- 

 dilla in January. This species was originally described from Pennsyl- 

 vania, and the IT. S. National Museum contains specimens collected in 

 the District of Columbia and Indiana. 



CHLOROPS TRIVITTATA Williston. 



A single specimen, captured at Arroyo in February. The species 

 was originally reported from St. Vincent, West Indies. 



SIGALOESSA BICOLOR Loew. 



One specimen, taken at Fajardo in February. The type locality of 

 this species is Cuba. 



Family AGROMYZID.F. 



DESMOMETOPA HALTERALIS, new species. 



Black, the bases of the tarsi yellow, a yellow spot between the anten- 

 n* and a densely gray pruinose one on the lower edge of the face ; front 

 wholly polished, proboscis slender, horny, the labella nearly as long as 

 the proboscis proper and folded back; thorax and scutellum polished, 

 two pairs of dorsocentral macrochretfie ; abdomen subopaque, the sides 

 and the fifth and following segments polished; wings white, costal and 

 first veins yellow, the others white, first posterior cell narrowed at 

 its apex. Length, 2 to 2.5 mm. A single specimen caxjtured at Utuado 

 in January; also seven specimens, collected at New Bedford, Massa- 

 chusetts (Dr. Garry de N. Hough), Lake Worth, Florida (Mrs. A. T. 

 Slosson), New Mexico (Prof. T. D. A. Cockerell), and Colorado (Mr. 

 Carl F. Baker). 



Tj/2)e.— Cat. No. 4387, U.S.N.M. 



AGROMYZA ^NEIVENTRIS Fallen. 



Nine specimens, collected at Utuado, Bayamou, Aguadilla, and 

 Mayaguez in January, and Fajardo in February. This is a European 

 species which also occurs over the greater portion of the United States. 



AGROMYZA NEPTIS Loew. 



Two specimens, from Aguadilla and Mayaguez in January. This 

 si)ecies was originally described from Nebraska; the U. S. National 

 Museum contains specimens from several other localities, ranging from 

 Massachusetts to Florida and Texas. 



