No.ijso. ^-E]V NORTH AMERICAN DIPTERA—COQVILLETT. 103 



on tlio outer .side; front and body opaque, mesonotum denseh^ o-ray 

 pruino.se; third joint of antennte narrow and elongate, about four 

 times as long- as broad; lenuth, 2.5 nun. Two females collected Maj' 

 29 by Mr. H. S. Barber. 



Ilah'dat. — Williams, Arizona. 



Typ,'.—V.^i. No. i\\9^^. r.S.N.M. 



RHAMPHOMYIA ALBATA, new species. 



Male. — Black, the knobs of hal teres, also the hairs and bristles, white; 

 e3'es contio-uous, third antennal joint elongate lanceolate, nearly live 

 times as long as the style, proboscis slightly shorter than height of 

 head; mesonotum and abdomen polished, not pruinose, abdomen com- 

 pressed, hypopygium rather small, central filament free except its 

 apex, not fractured nor flexuous, hairs of hypopygium rather short and 

 sparse; scutellum bearing four bristles; legs slender, nearh- bare, hind 

 tibia? bearing several short bristles on the outer side, first joint of hind 

 tarsi considerably enlarged, over twice as thick as that of the front 

 tarsi and with several short bristles on the upper side; wings hyaline, 

 stigma gra3'ish brown, sixth vein obliterated before reaching the wing- 

 margin. 



Female. — With the exception of the sexual characters, like the male 

 except that the apical portion of the wings beyond middle of discal 

 cell is pale brown. 



Length, 2.5 mm. Three males and five females collected May 29, 

 June 2, 12, and 13, by Mr. H. S. Barber. 



Halntat. — Williams, Arizona. 



Type.—Q^i. No. 6198, U.S.N. M. 



Family CESTRID.E. 



CUTEREBRA HISTRIO, new species. 



Black, the abdomen st(Hd-l)lue, apical portion of arista whitish; front 

 somewhat opaque, very thinly grayish pruinose, the ocellar triangle 

 and orbits polished, the latter marked with a gray pruinose spot near 

 the middle and another at lower angle of front, a smaller spot near 

 upper corner of facial depression, hairs of upper part of front chiefly 

 black, on remainder largel}" wdiite; face and cheeks densely gra}' prui- 

 nose, each side of face marked with four polished streaks, one of which 

 is in lower part of facial depression, the other three extend inward 

 from the e3'e, the upper one siibtriangular and almost reaching the 

 facial depression, the middle one almost reaching lower end of facial 

 depression, then curving downward and extending parallel with the 

 oral opening, reaching slightl}- farther backward than middle of cheek, 

 the lowest streak joins the second near lower corner of facial depres- 

 sion, and a short distance from this junction it emits a broad but short 

 branch toward the under side of the head; a velvet l)lack streak on 



