HYMENOPTERA. 



11 



8. Zethus Mexicanus. 



Vespa Mexicana, Linn. Syst. Nat. i. 953. 6. 



Tigny, Hist. Ins. iii. 579. 

 Vespa recurvii-ostris, De Geer, Mem. Ins. iii. 579. t. 29. f. 4-6. 

 Zethus cyanipennis, Fabr. Ent. Syst. ii. 277- 86. 

 Polistes cyanipennis, Fabr. Syst. Piez. 275. 30. 



Coqtieb. Illustr. Icon. Itis. dec. i. t. 6. f. 4. 

 Vespa mexicana, Oliv. Encycl. vi. 673. 

 Eumenes cyanipennis, Latr. Hist. Nat. Ins. xii. 345. 

 Zethus cyanipennis, Latr. Hist. Crust, et Ins. iv. 138. 



Bricks. Faun, et Flo. Brit. Guiana, iii. 590. 



Sauss. Mon, Guepes Sol. 12. 6. 



Hab. South America; Cayenne. 



9. Zethus ferrugineus. B.M. 

 Zethus ferrugineus, Sauss. Mon. Guepes Sol. 14. 10 $ . 



Hab. South America ; Brazil (Para). 



10. Zethus pallidus. 



Female. Length 6^ lines. — Pale testaceous yellow : the head, 

 mesotborax above, the apical margin of the scutellum, and a 

 longitudinal stripe on the petiole of the abdomen, black ; the 

 antennae, mandibles, clypeus, and a transverse line above it, tes- 

 taceous-yellow. The head and thorax with a thin golden-yellow 

 pubescence, that on the metathorax and abdomen is more dense 

 and longei", coarsely punctured ; the wings subhyaUne, the supe- 

 rior pair with a yellow stain on their anterior margin ; beyond 

 the stigma the margin is slightly fuscous ; the mesotborax with 

 two longitudinal yellow stripes ; the central suture of the meta- 

 thorax black. Abdomen : the ajiical margin of the second seg- 

 ment with a deep groove a little within, the margin itself much 

 elevated. 



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



11. Zethus sculpturalis. 



Male. Length 6-7 lines. — Black : the clypeus with large 

 distant shallow punctures; the head above the antennae coarsely 

 longitudinally rugose ; the anterior margin of the clypeus and a 

 small ovate spot at the insertion of the antennae yellow. Thorax : 

 the prothorax transversely and coarsely rugose before the tegulae, 

 the mesotborax and scutellum longitudinally so ; the metathorax, 

 sides of the thorax, and the clypeus covered with cinereous 

 pubescence; the prothorax with a deep transverse channel in 



