1893.] NATURAL SCIENCES OF PHILADELPHIA. 519 



with strong, separated punctures; scutellum likewise, not impressed, 

 upper surface of metathorax very strongly reticulated, the sides 

 coarsely striated; legs tolerably well spined; pygidiura very sparsely 

 punctured, a little more than twice longer than it is broad at the 

 base. Black; last abdominal segment red; front, face, clypeus and 

 thorax more or less, with silvery pubescence; abdomen with a dense 

 silvery pile; wings fuscous, base broadly hyaline, nervures black; 

 marginal cell obliquely truncate; second submarginal cell at the top 

 much greater than the third at the same place. Length 10-11 mm. 

 Florida, in the vicinity of St. Augustine (C. W. Johnson). The 

 dark wings and sculpture of metathorax will distinguish this species 

 from its allies. 



17. — Tachysphex fusus n. sp. 



9 . — Anterior margin of the clypeus slightly produced medially, 

 not dentate laterally; front with the punctures coarser and closer 

 than in the species just preceding; vertex strongly punctured; 

 occiput when viewed from behind emarginate at the top; space be- 

 tween eyes at top much greater than the length of antennal joints 2 

 and 3 united about equal to joints 3 and 4 united; first joint of flagell urn 

 but little shorter than the second ; dorsulum with strong separated punc- 

 tures; scutellum distinctly impressed; metathorax above strongly 

 granulated, the sides finely, though distinctly striated; legs tolerably 

 well spined; pygidium sparsely punctured, about two and a half 

 times longer than it is broad at the base. Black; scape beneath at 

 apex and the mandibles in the middle reddish ; tarsi reddish-tes- 

 taceous; last two abdominal segments bright red; front, face and 

 clypeus densely clothed with silvery pubescence, the thorax sparsely 

 clothed; abdomen with a rather dense silvery pile; wings subhyaline, 

 iridescent, nervures black; marginal cell obliquely truncate; width 

 of the second submarginal cell at the top usually greater than the 

 third at the same place. Length 9-10 mm. 



$ . — Front with coarse, confluent punctures; vertex strongly 

 punctured; space between eyes at top, if anything, greater than the 

 length of antennal joints 2-4 united; anterior margin of the clypeus 

 with the lateral angles sharp and with the medial portion very 

 slightly produced; antenna- rather long, the flagellum a little thick- 

 ened medially, the first joint of the latter about one-third shorter 

 than the second; dorsulum with strong, separated punctures; scutel- 



