12 IIYMRNOPTERA. 



front, the anterior marji:in elevated ; a spot on the teguhc behind, 

 and the ])ostenor margin of the scntellum, yellow ; the \vin<^s 

 fuseo-hyaline; the anterior femora yellow at their apex outside, 

 and the tihi:e also witli a yellow stn])e(mtside ; the claw- joint of 

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

 the second and third segments with a naiTOW 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. II. 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 lobulatur. B.M. 



Zethus lobulatus, Sauss. Mon. Guepes Sol. Supp. 11 (j. 2. t. 6. 

 f. 4, 4 a ? . 



Hab. Brazil (Amazons). 



14. Zethus cinerascens. 



Zethus cinerascens, Sauss. Mon. Guepes Sol. Supp. 117. 3. 

 Hab. Brazil. 



15. Zethus parvulus. 



Zethus parvulus, Sauss. Mon. Guepes Sol. Supp. 1 19. 5. t. 6. f. I ^ . 

 Hab. Brazil. 



16. Zethus geniculatus. 



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



xiii. 80. 61. 

 Zethus geniculatus, Sauss. Mon. Guepes Sol. Supp. 120. 6 <? $ . 



Hab. Para. 



17. Zethus Hilarinus. 



Zethus Hilarinus, Sauss. Mon. Guepes Sol. Supp.]20.7.t.().LG $ . 

 Hab. Brazil. 



