34 THE CANADIAN ENTOMOLOGIST. 



oblique spots on each remaining segment, the anterior spot obsolete on 

 the last two segments, the posterior spots uniting with the gray lateral 

 margin except on the second segment, each extending obliquely inward 

 from the posterior angle of the segment and- reaching at least a third of 

 the distance across the segment, those on the sixth segment united ; pile 

 of dorsum very short, sparse, depressed, mostly light yellowish, that of 

 the sides and venter longer and white. Pile of legs white, the bristles 

 light yellow ; front and hind tibiae and their metatarsi densely bright 

 yellow pubescent within ; spur of front tibiae rather slender, middle 

 tibia? also furnished with a strong, nearly straight black spur at the tip 

 within. Wings pure hyaline, the extreme apex gray, a large brown cloud 

 on veins at bases of the first and second submarginal cell, of each pos- 

 terior cell and of the discal cell ; all posterior and the anal cell open, 

 second submarginal cell destitute of a stump of a vein. Halteres black. 

 Length, 1 1 mm. Ventura County, Cal. A single specimen, in April. 



Blacodes trtoicus, n. sp., ^ $ . 



Same as cristatus, described above, with these exceptions : Tibiae, 

 extreme apex of femora, and base of each joint of the tarsi, yellow. 

 Pollen of front light gray, mystax very sparse, white ; third joint of 

 antennae almost linear, nearly four times as long as the second. Thorax 

 destitute of a medium crest of pile, scutellum not densely pilose, bearing 

 only two marginal bristles, metanotum uniformly gray pollinose. destitute 

 of silvery spots. Pollen of abdomen, consisting of an anterior cross band 

 on each segment, dilated each side so as to reach the posterior angle of 

 the segment. Brown clouds on wings very faint ; base of second sub- 

 marginal cell furnished with a long stump of u vein. Halteres yellow. 

 Length, 9 mm. Los Angeles County, Cal. Two males and two females. 



Blacodes dansus, n. sp., S 9 • 



Differs from truncas only as follows : In the female the pollen on 

 the abomen is much more extended, covering nearly the entire dorsum, 

 but in the male it is confined to the anterior end and sides of each seg- 

 ment, that on the sides being greatly dilated inward at the posterior 

 corner of each segment. Base of second submarginal cell destitute of a 

 stump of a vein ; anal cell closed and short petiolate ; brown clouds of 

 wings obsolete or wanting. Length, 7 to 9 mm. Orange County, Cal. 

 Three males and six females. 



