512 PROCEEDINGS OF THE ACADEMY OF [1893. 



third submarginal cell at the top nearly twice greater than the width 

 of the third at the same place. Length 11 mm. 



Los Angeles County, California. (Collection U. S. National 



Museum.) 



5. — Tachysphex crenulatus u. sp. 



9. — Anterior margin of the clypeus distinctly crenulated; front 

 finely granulated throughout; vertex with very fine and close punc- 

 tures; space between the eyes at top about equal to the length of an- 

 tennal joints 2 and 3 united; first and second joints of the flagellum 

 equal in length; dorsulum very closely punctured, the punctures 

 much stronger than those on the vertex; scutellum slightly impressed 

 anteriorly; metathorax above finely granulated, the metapleurse in- 

 distinctly striated, as is likewise the posterior face; legs stout, strongly 

 spinose; abdomen above impunctate, the second and last ventral seg- 

 ments with sparse punctures ; pygidial area with large, scattered 

 punctures, depressed on apical half, its length is about twice greater 

 than its width at the base. Black; mandibles in the middle, and 

 indistinct spot on scape at apex beneath and the tarsi, obscure red- 

 dish; abdomen dark red; teguhe testaceous; wings subhyaline, the 

 nervures black; marginal cell subtruncate at apex; space between 

 the second and third submarginal cells at the top about equal. 

 Length 11 mm. 



California. 



6. — Tachysphex tarsatus Say. 



Larra tarsata Say, Western Quarterly Reporter, II, p. 78. 

 Larra&a tarsata Cress., Proc. Ent. Soc. Phila., IV, p. 4(54. 9 . 



9 . — Anterior margin of the clypeus either slightly emarginate in 

 the middle or entire, armed with one tooth laterally ; front finely 

 granulated ; punctures on the vertex fine ; space between the eyes at 

 the top about equal to the length of anteunal joints 2 and 3 united, 

 perhaps a little greater ; first joint of the flagellum about one-third 

 shorter than the second ; dorsulum more finely punctured than the 

 front, depressed in the middle anteriorly; scutellum punctured like 

 the dorsulum, not impressed; metathorax above finely coriaceous, the 

 metapleurre indistinctly striated, the posterior face transversely striated, 

 with a long, deep, longitudinal fovea in the middle; legs tolerably 

 well armed with spines; abdomen above impunctuate, the last two 

 ventral segments sparsely punctured ; pygidial area not so distinctly 



