Vol. IX] COLE & LOVETT—NEW OREGON DIPTERA 241 



by Sweeney; two from Lava Lake, July, 1915, by Lovett. The 

 specimen from Corvallis is decidedly more blue in color than 

 the alpine forms, otherwise similar. 



28. Bachypalpus pigra Lovett, new species 



Length 10 mm. Black ; face, front and antennse black ; legs 

 black, white pilose; front and middle knees briefly brown; ab- 

 domen shining; second segment with opaque posterior cross- 

 band. 



Female : Face shining 'black, bare, briefly white pilose along eye margins ; 

 cheeks shining black with moderately elongate white pile fcelow, extending 

 around on margin to occiput ; front black, briefly white pilose ; shining at 

 base of antennae, opaque above ; vertex subshining ; pile white, moderately 

 elongate; antennae black; third joint brownish, as broad as long, rounded, 

 briefly silvery pollinose ; arista dark reddish brown, lighter at tip. 



Thorax shining brassy black with two median, moderately broad, opaque 

 greyish pollinose stripes, meeting behind to form a spot in front of the 

 scutellum ; a similar outer pair of stripes sub-interrupted at suture ; pile of 

 thorax light yellow, black on dorsum in middle ; scutellum of same color 

 as thorax, pile on margin elongate white. 



Abdomen shining black; first and second segments with greenish re- 

 flections ; first with median opaque black spot ; second with opaque black 

 band on posterior margin, convex in front and not reaching the lateral 

 margins ; succeeding segments shining black with blue reflections ; pile of 

 abdomen white or grey, sparse and short on disc, short and black on opaque 

 band of second segment. 



Legs black with white pile, knees briefly brown ; hind femur distinctly 

 thickened, tibia arcuate. Wings : Veins brownish, yellowish at base ; 

 stigma brown and a well defined brown cloud on all cross-veins. Halteres 

 white at margin, brown at base. 



Holotype (No. 497), female, in Museum of the California 

 Academy of Sciences, collected at Mt. Jefferson, August, 15 

 (A. L. Lovett). 



Near rileyii, but distinct in antennae, pile, abdominal mark- 

 ing's and lesfs. 



29. Xylota scutellarmata Lovett, new species 



Length 8 mm. Shining black; thorax with short golden 

 pile ; margin of scutellum with four elongate black bristles ; 

 abdomen opaque black, segments two and three with small 

 yellow triangular spots; pile white on the lateral margins of 

 first and second segment; on the yellow spots and small tri- 

 angular areas and on anterior margin of fourth segment with 

 elongate white pile ; fourth segment shining black. 



