306 



HYMENOPTERA. 



clypeus with a transverse rugose furrow ; the mandibles ferrugi- 

 nous a little beyond the middle, the tips black. The mesothorax 

 smooth and slightly shining ; the metathorax transversely rugose; 

 wings black, slightly iridescent ; the legs shining, the tibiae with 

 a cinereous pile within. Abdomen subelongate, pointed at the 

 apex, the apical margins of the first and three following segments 

 with fasciae of silvery -white pubescence; the apical segment 

 carinated at the sides and rather strongly punctured. 



Hab. Brazil. (Coll. F. Smith.) 



39. TACHYTES S-CINCTUS. 



Liris tricincta, Fabr. Syst. Piez. 229. 5? 

 Tachytes 3-cincta, Dahlb. Hym. Europ. i. 125. 



Hab. Island of St. Thomas. 



40. TACHYTES LABIATUS. 



Sphex labiata, Fabr. Ent. Syst. ii. 211. 52. 



Pompilus labiatus, Fabr. Ent. Syst. Supp. p. 247. 9 ; Syst. Piez. 



p. 191. 16. 

 Tachytes murina, Daklb. Hym. Europ. i. 132 & type sp. in Mus. 



Kiel. 



Hab. South America. 



Species of North America. 

 Abdomen black. 



41. TACHYTES AURULENTUS. B.M. 

 Larra aurulenta, Fabr. Syst. Piez. 220. 7. 



Say, Bost. Journ. i. 371. 3. 



Hab. North America. 



42. TACHYTES DIVES. 



Tachytes dives, St. Farg. Hym, iii. 247. 8. 

 Hab. Carolina. 



43. TACHYTES ARGENTIPES. 



Female. Length 7 lines. Black : the face, cheeks and man- 

 dibles at their base covered with silvery pubescence ; the man- 

 dibles rufo-piceous ; the vertex and thorax thinly covered with 

 long pale pubescence ; the lateral and posterior margins of the 

 mesothorax, the post-scutellum, and a spot on the posterior 



