12 HYMENOPTERA. 



front, the anterior margin elevated ; a spot ou the tegulae behind, 

 and the posterior margin of the scutellum, yellow ; the wings 

 fusco-h valine; the anterior femora yellow at their apex outside, 

 and the tibife also with a yellow stripe outside ; the claw joint of 

 the tarsi rufo-testaceous. Abdomen : the apex of the petiole, and 

 the second and third segments with a narrow yellow fascia; the 

 margins of the following segments testaceous ; the second seg- 

 ment of an obscure reddish-brown. 



Hab. Brazil (Ega on the Amazons). (Coll. H. W. Bates.) 



This species is closely allied to Zethus cinerascens of Saussure ; 

 the sex described is not indicated. 



12. Zethus fraternus. B.M. 



Zethus fraternus, Sauss. Mon. Guepes Sol. 16. 14 <? . 

 Hab. Brazil. 



13. Zethus lobui^tus. B.M. 



Zethus lobulatus, Sauss. Mon. Guepes Sol. Supp. 116. 2. t. 6. 

 f. 4, 4 a ? . 



Hab. Brazil (Amazons). 



14. Zethus cinerascens. 



Zethus cinerascens, Sauss. Mon. Guepes Sol. Supp. 11 7- 3. 

 Hab. Brazil. 



15. Zethus parvulus. 



Zethus parvulus, Sauss. Mon. Guepes Sol. Supp. 1 1 9. 5. t. 6. f.l 5 . 

 Hab. Brazil. 



16. Zethus geniculatus. 



Didvmogastra geniculata. Spin. Mem. Accad. di Torino, ser. 2. 



xiii. 80. 61. 

 Zethus geniculatus, Sauss. Mon. Guepes Sol. Supp. 120. 6(5' $ . 



Hab. Para. 



17. Zethus IIilarinus. 



Zethus IIilarinus, Sauss. Mon. Guepes Sol. Supp. 120.7.t.6.f.G $ . 

 Hab. Brazil. 



