1893.] NATURAL SCIENCES OF PHILADELPHIA. 523 



erably fine and close punctures; scutellum slightly impressed; rneta- 

 thorax above strongly granulated, the metapleurse rather coarsely 

 striated as is likewise the posterior face; tibre and tarsi well armed 

 with spines; pygidial area feebly and sparsely punctured, but little, 

 if anything longer than twice its width at the base. Black ; man- 

 dibles medially, scape beneath at apex and tarsi, except first joint, 

 reddish; abdomen bright red, without silvery pile; wings subhyaline, 

 scarcely iridescent, nervures black; marginal cell obliquely trun- 

 cate; width of the second submarginal cell at the top decidedly 

 greater than the width of the third at the same place; head and 

 thorax very sparsely clothed with silvery pubescence. Length 14 

 mm. 



$ . — Front coarsely granulated, on upper portion becoming punc- 

 tured; vertex with distinct, rather sparse punctures, those on the 

 clypeus very fine and close; space between the eyes at top greater 

 than the length of antennal joints 2 and 3 united, but decidedly 

 shorter than 3 and 4 united; antenna? similar to the 9 , the first joint 

 of the flagellum a little more than one-quarter shorter than the second, 

 the second, third and fourth joints about equal; anterior margin of 

 clypeus subtruncate; dorsulum with distinct, tolerably close punc- 

 tures; metathorax above granulated, on the sides and behind 

 striated; legs feebly spinose; colored like the female. Length 10 

 mm. 



Nevada ; New Mexico. This is one of our largest species. 



22. — Tachysphex montanus Cress. 

 Larrada montana Ci\, Proc. Ent. Soc. Phila. IV, p. 465. £ . 

 Larra montana Patt., 1. c. p. 389. 



9 . — Anterior margin of clypeus subtruncate, with a large tooth 

 laterally; front with rather fine and close, though distinct punctures; 

 vertex very finely and closely punctured; space between the eyes at 

 top less than the length of antennal joints 3 and 4 united, but greater 

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

 about one-quarter shorter than the second; dorsulum with very fine and 

 close punctures; scutellum slightly impressed ; metathorax above 

 finely coriaceous, the metapleurse likewise, posterior face indistinctly 

 striated; legs strongly spinose; abdomen stout, more or less com- 

 pressed, especially apically; pygidial area sparsely punctured, its 

 lensrth a little more than twice greater than it is wide at base. 

 Black; mandibles medially, scape beneath at apex and tarsi, except 



