240 ENTOMOLOGICAL NEWS. [June, '07 



8 Chilosia cyanea Hunter. 



One female from Colfax, Washington, July 10, 1895, which 

 agrees in every way with Hunter's description, except the 

 wings are cinereous with the basal half tinged with brown. 

 Formerly recorded from Moscow, Idaho. 



9. Chilosia occidentalis Williston. 



A male from Custer, South Dakota, which coincides with 

 Williston's description. The wings are cinereous, with a streak 

 of dark brown running obliquely through the center. Length 

 10 mm. Former records from Alaska and California. 



10. Chilosia laevis Bigot. 



CK Black, eyes bare, front and vertex long, black, pilose, face shining 

 black, bare, deeply concave below the antennas to tubercle which pro- 

 jects farther than the antennae, then deeply concave to epistoma, lateral 

 sutures extend to base of the antennae. Antennae very small and nearly 

 b!ack, arista more than twice as long as the antennas, very finely pubes- 

 cent. Thorax and scutellum shining black with a greenish tint, clothed 

 with long black pile which shows lighter in some lights. Borders of 

 the scutellum with a row of long black, bristly hairs. Abdomen ovate, 

 first, fourth and fifth segments sub-shining, second and third, except 

 anterior angles, opaque, clothed with a fine black pile and longer luteous 

 pile which is quite long on the lateral margin of the segments. 

 Halteres testaceous, squamae blackish, black ciliate. Legs black, fringed 

 with luteous pile, base of tibiae somewhat luteous. Wings cinereous, 

 hyaline, upper and basal part tinged with light brown. Length, 8 mm. 



One male from Pike's Peak, Col., July 20, 1906 (Prof. 

 Bruner). Formerly recorded from a female from Washing- 

 ton, by Bigot. Bigot's description is rather short, but I 

 believe this to be correctly determined. 



11. Melanostoma coerulescens Williston. 



One male from Moscow, Idaho. The tubercule is smaller, 

 the lateral spots on the second segment of the abdomen are 

 very faint and whitish, those on the third segment are very 

 distinct and yellow, those on the fourth are nearly as faint as 

 the spots on the second, and are also whitish. The remain- 

 ing characters coincide with Williston's description. Formerly 

 recorded from Colorado and Quebec. 



