1898.] NATURAL SCIENCES OF PHILADELPHIA. 527 



length of joints 3 and 4; first joint of flagellum scarcely one-quarter 

 shorter than the second; dorsulum very finely and closely punctured; 

 metathorax above granulated, metapleurse very finely striated; pygi- 

 dial area strongly and sparsely punctured, a little more than twice 

 longer than it is wide at the base. Black; mandibles medially, 

 scape beneath at apex and the tarsi, except first joint, reddish; abdo- 

 men without silvery pile, the first three segments red; wings pale 

 subhyaline, iridescent, nervures testaceous; marginal cell obliquely 

 subtruncate; second and third submarginal cells at the top about 

 equal, if otherwise, the third is widest; front, face and clypeus 

 with sparse silvery pubescence ; thorax on sides and beneath, with a 

 silvery pile. Length 7 mm. 



$ . — Front very finely granulated; space between the eyes at top 

 equal to or a little greater than the length of antennal joints 3 and 4 

 united; antennae tolerably long and stout, the first joint of flagellum 

 about one- third shorter than the second; the metathorax is more 

 coarsely sculptured than in the female, the upper surface being 

 strongly granulated and the base striated; colored like the female; 

 pubescence on face denser: thorax with distinct silvery pubescence ; 

 abdomen with silvery pile. Length 7-8 mm. 



Montana. Greatly resembles exsectus, but the eyes are more widely 

 separated at the top, etc. 



28. — Tachysphex quebecensis Frov. 



Larva quebecensis Prow, Faun., Ent. Can. 11,633. £ <J . 



9 . — Anterior margin of clypeus subtruncate, dentate laterally, 

 sometimes indistinctly so; front finely granulated; vertex finely and 

 closely punctured ; space between the eyes at the top about equal to 

 length of antennal joints 2 and 3 united; first joint of the flagellum 

 but little shorter than the second; dorsulum very finely and closely 

 punctured; scutellum distinctly impressed; metathorax above 

 coarsely wrinkled, the metapleurse coarsely striated, the posterior 

 face not so strongly striated; pygidial area strongly and sparsely 

 punctured, nearly two and a half times longer than it is broad at the 

 base. Black; mandibles in the middle, scape beneath at apex and 

 the tarsi apical ly, reddish; abdomen more or less with silvery pile, 

 the first two segments bright red ; wings dark subhyaline, iridescent, 

 nervures blackish ; marginal cell obliquely truncate; width of the 

 second and third submarginal cells at the top variable; head in front 

 and thorax with a sparse, silvery pubescence. Length 10-11 mm. 



