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 antennae dark brown. Antennae long; flagellar segments 

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

 dark brown; genae 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. Pleurae dull light yellow, 

 the mesopleura? sufl'used with brownish. Halteres rather long, 

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

 low, femora dull yellow, the tip brown; tibia? 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.) 



Abdomen, tergites largely brown, usually with a yellow tri- 

 angle on the anterior portion of the sides of the sclerites; sternite 

 yellow; 8th and 9th, brown; 8th tergite, with caudal margin pale, 

 straight; 9th tergite, 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 at tip, its inner' or caudal margin provided with 

 4-5 rounded teeth. Ventral arm a small, rounded, little chitinzed 

 lobe, covered with long hairs; guard of the penis very long, pale, 

 projecting beyond the apical appendages, bifid at tip with 2 slight- 

 ly chitinzed divergent horns, these horns directed ventrad; 2nd 

 gonapophyses, slender, much shorter than the penis guard, scarcely 

 enlarged at end, but inner face produced into a short, indistinct 

 tooth. (See pi. IV.; fig. 10.) 



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

 long, the tergal valves much longer than the sternal valves. 



