202 THE CANADIAN ENTOMOLOGIST 



Male. — Rostrum and palpi brown ; antennae, segments 1 and 2 

 pale whitish yellow; segment 3 yellowish basally, brown at tip; re- 

 mainder of antenna? dark brown. Antennae long; flagellar segments 

 long, cylindrical, subequal in length. Front, vertex and occiput, 

 dark l)rown; gena; lighter colored, more yellowish. 



Pronotum dark brown medially, yellowish on sides; mesonotal 

 praescutum light yellow, with a broad, conspicuous median brown 

 stripe; scutum with the lobes dark brown, paler medially; scutel- 

 lum dark brown, except the narrow median incision on the anterior 

 margin; post-notum largely dark brown. Pleura" dull light yellow, 

 the mesopleurie suffused with brownish. Halteres rather long, 

 pale, knob a little darker. Legs, coxae and trochanters light yel- 

 low, femora dull yellow, the tip brown; tibiae dull yellow, tip 

 scarcely darker; tarsi, segment 1 dull brownish yellow basally, 

 darkening to brown on apical third; remainder of tarsi brown. 

 .Wing pale brownish yellow, costal and subcostal cells rather 

 clearer yellowish; veins brown; a conspicuous brown stigma; very 

 pale grey clouds along the cord, outer end of cell 1st M2, and at 

 origin of Rs. Venation see fig; Sc long, ending before fork of Rs, 

 Sc2 longer than Sci, at the tip; Rs long arcuated at origin some- 

 times with a spur. (See pi. III.; fig. 9.) 



.Xlxlomeii, tergites largely brown, usualh witii a \cilow tri- 

 angle on tlie anterior [)ortion of the sides of the scleritcs; sternite 

 yellow; 8ih and (lili, brown; 8th tergite, with caudal margin pale, 

 straight; illii urgitc, with caudal margin strongly convex; with a 

 brown median mark. Pleural pieces short, triangular, very broad* 

 at base, narrowed apically; dorsal apical appendage short, cylin- 

 drical, narrowed al tip, its inner or caudal margin provided with 

 4-5 roundid Icith. Ventral arm a small, rounded, little chilinzed 

 lobe, covered wiili long hairs; guard of the penis ver\- long, pale, 

 projecting be\-ond the apical appendages, bifid at tip with 2 slight- 

 K- chitinzed divergent horns, these horns directed ventrad; 2nd 

 gonapoph\ses, slender, much shorter than the penis guard, scarcely 

 enlarged at end, i)ui inner face produced into a short, indistinct 

 tooth. (See pi. 1\'.; tig. 10.) 



Female about as in the male; valves of the ovipositor rather 

 long, the tergal \ ai\es much longer than the sternal valves. 



