1893.] NATURAL SCIENCES OF PHILADELPHIA. 531 



as those of the vertex; metathorax above granulated, the meta- 

 pleurae and posterior face distinctly, though not strongly, striated; 

 legs feebly spinose; pygidium strongly and sparsely punctured, its 

 length hut little greater than twice its width at the base. Black; 

 mandibles medially, scape beneath at apex and the most of tarsi, 

 reddish; abdomen not pilose, and, excepting the last two segments 

 bright red; wings subhyaline, nervines testaceous; marginal cell 

 obliquely truncate; face and clypeus with sparse silvery pubescence. 

 Length 6 mm. 

 California. 



34. — Tachysphex punctifrons Fox. 



Larva punctifrons Fox, Ent. News. II, p. 194. 9 • 



9 . — Anterior margin of clypeus with or without an emargiuation 

 medially, armed with a tooth laterally; front finely and evenly 

 punctured, appearing granulated ; the vertex more finely punctured ; 

 space between eyes at top somewhat greater than the length of an- 

 tennal joints 2 and 3 united, but much less than that of joints 3 and 

 4 united; dorsulum like the vertex; first joint of flagellum but little 

 shorter than, the second; scutellum slightly impressed; metathorax coria- 

 ceous, the posterior face indistinctly striated ; legs strongly spinose; 

 pygidial area sparsely and strongly punctured, its length fully two- 

 and-a-half times, or more, longer than it is wide at base. Entirely 

 black, clothed with a sericeous pile ; wings subhyaline, not iridescent, 

 nervures testaceous ; marginal cell obliquely subtruncate ; face and 

 clypeus without silvery pubescence ; apical half of tarsi reddish. 

 Length 12-13 mm. 



$ . — Anterior margin of clypeus not emarginate, nor dentate; 

 sides of tront and face depressed ; space between eyes at top about 

 equal to the length of antennal joints 3 and 4 united ; first joint of 

 flagellum not much shorter than the second; wings iridescent; head 

 in front with rather dense silvery pubescence. Length 11-12 

 mm. 



New Jersey, in September; Florida (Mrs. A. T. Slosson); Illi- 

 nois; Colorado; Montana. The dense sericeous pile, with which this 

 insect is clothed, and the large size, will at once distinguish it from 

 the other species of this genus. 



35. — Tachysphex mundus n. sp. 



9 • — Anterior margin of clypeus not strongly, though distinctly 



