THE CANADIAN ENTOMOLOGIST. . 151 



extending slightly over the margin of the enclosure ; the posterior face is 

 divided by a very strong sulcus, which begins at the apex of the basal 

 enclosure ; with the exception of a few coarse rug^e at the apex the 

 posterior face is smooth, or with exceedingly fine punctures ; the meta- 

 thoracic stigmas are covered by a strong, somewhat flat-like production ; 

 wings sub-hyaline, with a yellowish tinge, the marginal, a part of the three 

 submarginal cells fuscous, the veins enclosing the marginal, second and 

 third submarginal and the outer vein of the third discoidal cells are 

 black, the rest yellowish ; transverse medial vein received by the externo 

 medial nervure before the apex of the submedian cell of the hindwings ; 

 legs stout, the four hind tibice sparsely spinose ; anterior tarsi distinctly 

 ciliated, the bristles sparse and short, about half as long as the first joint. 

 Abdomen glabrous,'beneath with a few scattered punctures. Black ; scape 

 beneath, manibles medially, prothorax above, tubercles, two spots on 

 mesopleuriB, broad line on scutellum, post-scutellum, two large ovate spots 

 on the metathorax, femora beneath, except base, the base of tibiae, the 

 posterior coxcC beneath and the apical margins of abdominal segments 

 1-5 above, those on segments one and two emarginate in the middle, the 

 base of the last segment laterally, beneath the apical half of the second, 

 the third fourth and fifth entirely, all yellowish ; tegulae, tibiae beneath 

 and the tarsi more or less brownish. Length, 12 mm. 



S. — Differs from the ? as follows: Frontal furrow indistinct; the 

 four anterior tibiae and tarsi entirely yellowish ; all the cox^e spotted with 

 yellow beneath and ventral segments of the abdomen 3-5 not entirely 

 yellowish ; the third antennal joint about one-fifth longer than the 

 following one. 



Nevada. Two specimens. 



GORYTES ATRIFRONS. 



? . — Resembles iievadensis very much, but differs as follows : Front 

 finely and closely punctured ; third antennal joint about one-fourth longer 

 than the fourth; labrum ciliated with silvery hairs; metathorax posteriorly 

 strongly rugulose ; the first joint of the anterior tarsi is about equal m 

 length to the three following ones united, whereas in nevadensis it is 

 longer than the three following joints ; the bristles with which the joints 

 are ciliated are more than half as long as the first joint ; the yellow bands 

 of the abdomen are narrower, and the pygidium is larger ; the scape and 

 joints 3-8, beneath, brownish; the legs are yellow in a greater extent than 



