NO. 1198. DIPTERA FEOM PUERTO RICO— COQUILLETT. 265 



tarsi black; wings hyaline, hal teres whitish, the knobs longer than the 

 stems. Length, 1.2 mm. Three specimens, collected at Utuado and 

 Mayaguez in January. 



Type.— Gd.t. No. 4383, U.S.N.M. 



Family OSCmiD^. 



GAURAX LANCIFER, new species. 



Yellow, the antennal arista, an ocellar dot, a somewhat lanceolate 

 spot on the posterior half of the mesonotum, an oval spot on the pos- 

 terior lower corner of the mesopleura, usually one on the lower part of 

 the pteropleura, and the dorsum of the abdomen except at its base, 

 black; mesonotum polished, marked with three reddish -yellow vittse, 

 scutellum in outline nearly triangular; wings hyaline. Length, 1.5 to 2 

 mm. Eight specimens were bred in February from larvae infesting the 

 egg-sacs of a spider at San Juan. Also, five specimens, bred by Mr. 

 H. G. Hubbard, March 16, 1894, from larvae infesting the egg-sacs of 

 a spider at Montserrat, West Indies. 



Type.— Cat. No. 4384, U.S.N.M. 



HIPPELATES CONVEXUS Loew. 



Thirty-four specimens, collected at Mayaguez, Bayamon, TJtuado, and 

 Aguadilla in January, and Fajardo, Arroyo, and Vieques Island in 

 February. The species was originally described from Cuba, but also 

 occurs in the southern portion of the United States and in Mexico. 

 Three specimens from the last-named country were collected April 10, 

 1898, by Dr. L. O. Howard, at San Jose de Guaymas. 



HIPPELATES PUSIO Loew. 



Eighteen specimens, from Mayaguez, Bayamon, and Aguadilla in 

 January, and Fajardo and Arroyo in February. It was originally 

 described from Texas, but ranges as far northward as New Bedford, 

 Massachusetts. 



HIPPELATES FLAVIPES Loew. 



Five specimens, from Fajardo and Vieques Island in February. The 

 species was originally described from Cuba, but occurs in this country 

 as far northward as Franconia, New Hampshire ; this appears to be the 

 most northern limit of any species belonging to the present genus. The 

 specimens from St. Vincent, West Indies, which Dr. Willistou refers 

 to H. Jiavipes, evidently belong to some other species, since flavipes 

 belongs to his own subgenus Siphomyia, whereas he referred his speci- 

 mens to Hippelates as restricted. 



HIPPELATES TENER, new species. 



Head reddish yellow, the sides of the vertex brown, the occiput, except 

 the lower portion, black; frontal triangle polished dark brown, widely 



