1893.] NATURAL SCIENCES OF PHILADELPHIA. 515 



nervures testaceous, marginal cell subtruncate; second submarginal 

 cell at the top about equal to, or perhaps slightly greater than the 

 width of the third at the same place. Length Ih mm. 

 California. 



9. — Tachysphex dubius n. sp. 



$ . —Front finely granulated ; vertex finely and closely punctured; 

 space between the eyes at top greater than the length of antennal 

 joints 2 and 3 united, but less than joints 3 and 4; clypeus in the 

 middle of anterior margin a little produced, not coarsely punctured 

 on anterior half; antennae not or but very slightly thickened medi- 

 ally; the first joint of the flagellum more than one-third shorter than 

 the second; dorsulum very finely and closely punctured; metathorax 

 above coriaceous, the sides indistinctly striated, the hind face more 

 distinctly so; legs feebly spinose, the emargination of fore femora 

 rounded; last dorsal segment of abdomen finely and distinctly punc- 

 tured. Black; scape beneath at apex, mandibles medially and last 

 joint of tarsi obscure reddish; segments 1-3 of abdomen bright red; 

 face, front, clypeus and thorax with silvery pubescence ; abdomen 

 with silvery pile ; wings dark subhyaline, iridescent, nervures black; 

 marginal cell obliquely truncate; width of the second and third sub- 

 marginal cells at the top variable. Length 8-9 mm. 



Camden County, New Jersey, August 24th; Northern Illinois 

 (Dr. Nason). 



10.— Tachysphex semirufus Cress. 

 Larrada semirufa Cr., Proc. Ent. Soc. Phila.. IV, p. 464. £ . 

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



9 • — Anterior margin of the clypeus slightly rounded-out, armed 

 with two distinct teeth on each extreme side; front rather coarsely 

 granulated; vertex with fine distinct punctures; space between the 

 eyes at top about equal to the length of antennal joints 2 and 3 united, 

 perhaps a little greater; first joint of the flagellum scarcely one-fourth 

 shorter than the second; dorsulum with fine, close,distinct punctures; 

 scutellum a little more strongly punctured ; metathorax above dis- 

 tinctly granulated, indistinctly striated on the sides, the posterior 

 face a little more distinctly striated; legs strongly spinose; abdomen 

 above impunctate, the last ventral segment strongly punctured; py- 

 gidial area tolerably well defined, sparsely punctured, its length 

 nearly two and a-half times longer than it is wide at the base. Black; 



