THE CANADIAN ENTOMOLOGIST. 427 



of the discal cell. Third vein without bristles. Length, 9 5 mm., 

 wing 4 mm. 



Head — Front tapering, but more than one-third the width of 

 the head. Two weak lower frontals; all bristles and hair of the 

 insect are pale yellow or white. Cheeks rather broad. Oral 

 margin slightly projecting and strongly arcuate. Face whitish 

 with shallow antennal grooves. Antennae missing. 



Thorax — Gray; bristles and short hair yellowish. First pair 

 of dorso-central bristles about one-fourth from the transverse 

 suture to the scutellum. The latter is flat and bears two bristles. 

 Metanotum shining black. Halteres yellow. 



Abdomen — Black, the posterior borders of the separate 

 segments yellow. On the median line of the last abdominal 

 segment the yellow colour approaches half way to the base. 

 Macrochaetae v/hite and short. Genital segment shining black, 

 heavy conical, constricted, as long as the last two abdominal 

 segments taken together. 



Legs — Coxae yellowish gray; femora gray, yellowish at the 

 tips; tibiae and tarsi yellow. Hind tibia without a distinct 

 row of short strong bristles. 



Wings — Distal portion of wings with two whitish hyaline 

 indentations, separated by a dark oblique cross-band, which is 

 emitted from another dark brown band crossing the wing and 

 covering the posterior cross-vein. The apex of the wing is bordered 

 to a little beyond the fourth vein by a dark band, which is 

 narrowly connected anteriorly with the band crossing the wing. 

 The band crossing the wing is connected along the fifth vein with 

 the dark area in the proximal half of the wing. This area extends 

 from the costa posteriorly to the fifth vein and across the base of 

 the third posterior cell, and contains two whitish hyaline spaces. 

 One is in the marginal cell just beyond the tip of the first 

 longitudinal vein; the second is in the first basal cell below the 

 stigma. The base of the wing is whitish hyaline. In the figure 

 the whitish hyaline spaces are too dark. 



The generic location of this species is doubtful. 



