222 BLLLETIX 31, UNITED STATES NATIONAL MUSEUM. 



soiuetiiiu'sdark red, tliiid Joint obliquely oval ; arista yellowisli-browiiisli. 

 Face letieatiiij; to nearly as low as the bottom of the eyes, tlie (^pistonia 

 ])ro(luced, in j)rofile deeply concave; broadly sbining across ilic middle, 

 above, for the whole width, and for a short distance below the anlcinuf, 

 whitisli pollinose ; below, an oblique strii)e runs from the eye to the oral 

 niariiin in Iront. DiTsuin of thorax and scatellum metallic black, 

 shiiiiiiji', obscured by the pile, the tormer with four sub-obsolete copi>ery- 

 l)urple stripes. Abdomen black, or brownish black, sub-oj)aque in the 

 male on the i)osterior i)art of tlie second and third sejunients; pile 

 wholly light colored. Lejjrs black, extreme tip of femora, and narrow 

 base of tibia.', reddish yellow, the intermediate tibiae more reddish 

 thi-onghout, except a dark ring; front and middle tarsi reddish on the 

 basal joints; hind femora thickened, much so in the male, and on the 

 outer part below with an angular projection ; posterior tibiiie arcuated, 

 more so in the male, and with a tooth like ])rocess on the inner side 

 al>ove, corresponding to the femoral proje(;tion, and a stout spur at the 

 lower end, both of which are wanting in the female. Halteres and 

 teguhe light yellow. Wings nearly hyaline, near the end somewhat 

 iiifuscated; transverse veins lightly clouded ; stigma luteous. 



Two male specimens from Pennsylvania (Eugene Keen), and a tene- 

 ral iemale bred by Professor Eiley. 



Brachypalpus Rileyi, n. sp. 



Hdhitat. — North Carolina ! 



9. Length, 7""". Black. Antenna blackish-brown, third joint 

 transversely oval; arista yellow. Face and posterior orbits gray polli- 

 nose; cheeks shining black. Lower part of the front shining; across 

 the middle broadly x)ollinose; black pilose above. Dorsum of ihorax 

 black, sparsely pilose, in the middle with two narrow opaque stripes; 

 on each side a similar, abbreviated, and interi upted one. Abdomen 

 oval, bright shining black, sparsely light pilose; the first segment, the 

 second segment, except a large triangular shining spot on each side, 

 narrowly separated at their tips, and a posterior baud on the third seg- 

 ment. oi)aque black. Legs wholly black, with sparse light ]>ile; hind 

 femor.i thickened. Wings hyaline, stigma luteous, a narrow brown 

 cloud on base of second vein, anterior cross-vein, and the penultimate 

 section of fifth vein. 



One s])ecimen, North Carolina (National Museum, Professor Kiley's 

 coUection). 



Brachypalpus parvus, Ji. sp. 



Habitat. — Colorado ! 



J . Lengtli, 7""". Head as in B. Rileyi; the eyes narrowly separated 

 beh)w the ocelli. Dorsuni of thorax brassy black, shining, with two 

 narrow oj)a(|ne strii)es. abbieviated behind, and an outer abbreviated 

 stripe on ea(;h side, interrupted at the suture. Pile only moderately 

 abundant, light yellow. Abdomen shining metallic bronze black : the 



