38'J5. PROCEEDINGS OF THE NATIONAL MUSEUM. 425 



Female. — Same as tlie male, with tliese excei)tions: Abdomen de- 

 ])ressed, tapering to the apex, bind tibiae not thickened at the tips, tlieir 

 l)ile and that of the other tibia' rather short; wings brownish gray- 

 stigma dark brown. 



Ti/pcs.—^oi^. 3207 and o208, U.S.N.M.; length, 'M to i mm. A male 

 and female captured by the writer in February and March. 



LocnUtij. — Southern Calift)rnia. 



RHAMPHOMYIA AVIDA. new species. 



Male. — Head black, gray jiollinose, eyes contiguous, facets of nearly 

 a uniform size; antenna* black, third Joint very broad, gradually taper- 

 ing to apex, style scarcely one-sixth as long as the tlnrd joint; probos- 

 cis one-fourth longer than height of head, ])al[)i chirk brown. Thorax 

 black, opaque, bluish gray pollinose, its i)ile rather long and cpiite 

 abundant, mixed yellow and black; pleura black, bluish gray pollinose, 

 its pile yellow; scutellum concolorous with thorax, bearing four black 

 bristles. Abdomen black, oiia(]ue, bluish gray pollinose, its i)ile rather 

 long and quite abundant, yellowish wliite; hyi)oi>ygium small, uppei' 

 lamelL'c scarcely half as long as the middle ones, filament bristle-like, 

 arcuate, free on its lower third, issuing from middle of hypopygium. 

 Legs simple, rather stout, blackish brown, furnished with rather long 

 black bristles; front and middle metatarsi subecpial in size, the hind 

 ones nearly twice as thick as the others. Knob of halteres yellowish 

 }u(»wn. Wings hyaline, stigma and veins brown, fourth vein entire. 



Tiipe. — No. 3209, IT.S.X.M. ; length, 3:^ to 4 mm. Seven males, col- 

 lected in April and iNlay. 



Locality. — Massachusetts. 



RHAMPHOMYIA OTIOSA, new species. 



Female. — Head black, subshining, lightly brownish pollinose, anten- 

 na' Ijlack, third joint sublanceolate, style one-third as h>ng as the third 

 joint; proboscis nearly one-half longer than height of head; palpi 

 black. Thorax, pleura, and scutellum black, subshining, very lightly 

 pollinose, the i)ile and bristles black; scutellum bearing four bristles. 

 Abdomen depressed, dark brown, tapering to the tip, its s[)arse pile 

 black. Legs robust, dark brown, hind femora and tibia' compressed, 

 ui)i)er and under sides of the middle and hind femora, and the inner 

 and outer sides of the hind tibi;e ciliate with nearly erect scales; 

 middle metatarsi thicker and longer than the front ones, hind metatarsi 

 nearly twice as thick and one-half longer than the middle ones. Knob 

 of halteres blackish, fourth vein entire. 



Type. — No. 3210, U.S N.M,; length, 3 mm. A single specimen. 



Locality. — Colorado. 



