028 PROCEEDINGS OF THE ACADEMY OF [1893. 



£. — Front finely granulated; space between eyes at top greater 

 than the length of antennal joints 2 and 3 united, but a little less 

 than that of joints 3 and 4 united ; antennas rather long and slender, the 

 first joint of flagellura about one- third shorter than the second; an- 

 terior margin of clypeus slightly emarginate; metathorax more 

 strongly sculptured above than in the 9 , but the striatums of meta- 

 pleurre are not so strong; colored like the 9 , with the pubescence of 

 head and thorax more profuse. Length 9 mm. 



Canada (J. A. Guignard); Maine; Massachusetts. Resembles 

 very much tenuipunctus,but the sculpture of metathorax will at once 

 distinguish it from that species. 

 29. — Tachysphex compactus u. sp. 



$ . — Anterior margin of clypeus subtruncate, not dentate later- 

 ally; front with fine and close punctures, appearing somewhat granu- 

 lated; vertex very finely and closely punctured; space between the 

 eyes at top about equal to the length of antennal joints 3 and 4 

 united ; antenna? tolerably long and slender, the first joint of the 

 flagellum scarcely one-third shorter than the second; dorsulum very 

 fiuely and closely punctured; scutellum impressed; metathorax 

 above coriaceous, the metapleurse and posterior face finely and 

 rather indistinctly striated; legs strongly spinose. Black; man- 

 dibles medially, scape beneath at apex and the tarsi, except basal 

 joints, reddish; abdomen with a sparse, sericeous pile, the first three 

 segments red; wings subhyaline, not strongly iridescent, nervures 

 testaceous; marginal cell obliquely subtruncate; second submarginal 

 cell a little broader at the top than the third; front, face and 

 clypeus with silvery pubescence, the thorax sparsely so. Length 9 

 mm. 



Vancouver; Colorado. May be the $ of tenuipunctus, but I 

 scarcely believe it possible. Its robust form will at once distinguish 

 it. 

 30. — Tachysphex triquetrus n. sp. 



9 . — Anterior margin of clypeus indistinctly emarginate medial- 

 ly, armed with a large tooth laterally; front very finely and closely 

 punctured, the vertex even more finely so ; space between eyes at top 

 about equal to the length of antennal joints 2 and 3 united ; first 

 joint of flagellum but very little shorter than the second; dorsulum 

 punctured like the front, perhaps more finely so; scutellum iin- 



