THE CANADIAN ENTOMOLOGIST 123 



below base of vitta, the lower few pairs somewhat divergent from 

 its edges. 



Thorax. — Metanotum clothed with sparse, slender, reclinate 

 bristles. Spiracular hairs very dark, except those of spiracular 

 cover which are light coloured at tips. Epaulets dark. 



Wings. — Distinctly smoky under binocular; bend of fourth 

 vein normally a right angle, anterior cross-vein scarcely more basal 

 than end of first longitudinal (almost beneath it) ; third vein 

 bristly; costal spine vestigial; section III of costa slightly greater 

 than section V; calypters whitish, fringed with white hair. 



Legs. — Dark. Posterior femur sub-cylindrical, a little arched; 

 distal half of posterior ventral surface with a thin beard of long 

 hair; anterior face with three rows of bristles, those of intermediate 

 row few and not present distally, those of lower row scattered; 

 tibia with anterior and posterior beards of long, coarse hairs, the 

 former much the stronger. Middle femur clothed beneath with 

 short hair; anterior and posterior ventral rows of bristles present, 

 latter not complete proximally; distinct "comb" absent; tibia with 

 a slight beard-like fringe of hair posteriorly; submesotibial bristle 

 present. 



Chaetotaxy . — Anterior dorsocentrals long, as long as the two 

 anterior pairs of postsuturals; acrostichals absent; inner presuturals 

 scarcely or not at all differentiated : three pairs of well developed 

 postsutural dorsocentrals; praescutellar acrostichals present; scutel- 

 lar apicals present: two or three sternopleurals, if three the middle 

 one is very slender: lower sternopleurals slender, with hairs an- 

 terior to them. 



Abdomen. — Clothed above with short, reclinate bristles, be- 

 neath with longer, mostly erect hairs. Ventral plates almost 

 square (posterior angles not rounded), vestiture erect except that 

 of third which is short and decumbent. 



Chaetotaxy.- — Second segment without marginal bristles; third 

 with two marginals and four or five laterals (marginals and laterals 

 may not to be separated by increased spacing, so that there may 

 appear to be a complete marginal row of bristles). 



Genital Segments. — First, shining black or deep brown, in 

 profile slightly convex, for most part -the hairy vestiture shorter 

 than that of second, marginal bristles absent; second (g. s. 2), — 



