THE CANADIAN ENTOMOLOGIST. 119 



its area adjacent to the scutellum, immaculate. A few complete markings 

 beyond the middle. Corial lines pale smoky or grayish brown, confusedly 

 interrupted or obsolescent, fusing to form three delicate vermiculated 

 longitudinal stripes, these continue upon the membrane. Corium clothed 

 with sparse, fine depressed whitish hairs. 



Pronotum and anterior half of clavus rastrate. The tegmina are 

 semi-hyaline, the colour of the dorsum showing through, on account of 

 which the male appears darker than the female. Pronotum lenticular^ 2^ 

 times as wide as long, its posterior margin evenly rounded and not 

 produced, a small area of scutellum visible between it and the clavus. 

 Head emarginate behind, the lateral angles (with the eyes) acute and 

 slightly produced. Interorbital space about equal to posterior width of 

 eye. Posterior margin of eye touching occipital margin, except for a short 

 distance at the inner angle. Two parallel rows of punctures on either 

 side of the vertex. Intermediate tarsi y^ the length of tibia^ the latter 3/5 

 the length of femur. Posterior femora and tibia subeqaal, a little more 

 than Yz the tarsi in length. Aletaxyphus small, short, triangular. 



Sexual characters. — Male: Head acuminate., strongly carinate, about 

 Yz longer than pronotum. Fovea acorn-shaped, broad and deep, occupy- 

 ing the entire space between the eyes and reaching from the labrum to 

 the acute termination of the carina mentioned. Foveal surface clothed 

 with fine depressed whitish hairs. Palœ shi?ty ivory-white, very irregular 

 in shape, (cf. Fig. 6.) Lower edge entire, slightly concave ; upper surface 

 flat, deeply incised about midway the length, so as almost to cut the pala 

 into two joints. Viewed from the inner surface the outline suggests 

 somewhat the head of a bird of prey. Inner surface with a row of 23 

 dark brown "pegs" ; the first nine following the curve of the upper margin, 

 then the line arching downward to the limit of the cleft. Tip of pala with 

 a single long, serrated spur, a row of short spines along the lower inner 

 edge, a row of longer ones along lower outer edge. The posterior upper 

 margin of the pala projects slightly over the tibia in a flattened spur. 

 Tibia a little less than half the pala in length. Femur with a large 

 stridular area composed of fine spines set in rows. Asymmetry dextral. 

 Strigil very minute, .05 mm. long and 1/5 as wide as long, crescentric in 

 shape, lying in a small membranous projection of the 6th tergite, in the 

 antero-posterior axis, with about 18-20 transverse striae. Fifth, sixth and 

 seventh tergites divided, fourth deeply cleft. 



Female : Venter evenly rounded, front plane with a small circular 

 depressed fovea between the lower inner angles of the eyes. Palae oblong- 

 cultrate, lower edge straight or slightly incurved, upper edge straight to 



