544 PROCEEDINGS OF THE ACADEMY OF [1893. 



sparsely so medially ; metathorax above more finely reticulated than 

 in the 9 ; colored like the 9 ; abdomen rather densely clothed, es- 

 pecially ventrally, with dark pubescence; wings hyaline, fuscous 

 medially. Length 9-10. 



Var. A. ? $ . — Entirely black. Length 9-13. 



Var. b. 9 $. — Entirely black; pubescence white; mandibles of 

 $ yellow medially. 



Colorado (typical form) ; Montana ; Nevada ; Calif. ; Washing- 

 ton (var. A. =nigropilosa Cr. ); Montana (var. B. ). Algonquin, 

 Illinois (var. B. ) taken by Dr. W. A. Nason. 



5. — Astatus bicolor Say. 

 Astata bicolor Say, Long's Exp. St. Peter's River, p. 78. 1S23. 

 As tat a rufiventris Cr., Tr. Am. Ent. Soc. IV, p. 218 9 • 

 Astata terminata Cr.,ibid, p. 21S. $ . 

 . [status bicolor Kohl, 1. c. p. 447. 



9 . — Produced portion of anterior margin of clypeus truncate; 

 front with tolerably strong and close punctures; the vertex with the 

 punctures stronger and sparser than those of the front; first joint of 

 flagellum about or nearly one-third longer than the second; dorsulum 

 strongly punctured, the punctures on posterior portion but little 

 sparser than those of the anterior; scutellum sparsely punctured, im- 

 pressed medially; metathorax above coarsely reticulated, the meta- 

 pleurae, except lower basal portion, rugose ; tibiae and tarsi strongly 

 spinose; with exception of second ventral segment, the abdomen is 

 impunctate; pygidial area more than twice as long as it is broad at 

 the base. Black; abdomen entirely bright red; mandibles medially 

 and tarsi reddish- testaceous; head, thorax, legs and abdomen be- 

 neath with long, pale pubescence; apical third of wings fuscous; 

 marginal cell subtruncate, stigma black or testaceous. Length 11- 

 13 mm. 



$ . — Produced portion of anterior margin of clypeus truncate; 

 first joint of flagellum about one- third longer than the second; dorsu- 

 lum finely and evenly punctured throughout, the punctures finer 

 than in nubeeulus', sculpture of metathorax above much finer than 

 in the 9 ; pubescence colored like the 9 ; last two or three abdom- 

 inal segments black; wings subhyaline, stigma yellowish ; tarsi red- 

 dish. Length 7-9 mm. 



Canada and the entire United States. The larger females are the 

 A. rvfiventris Cresson, while A. terminata Cresson, is but a slight 

 variation of the male. 



