12 KYMENOPTERA. 



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

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

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

 and the tibiae 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. 



Hob. 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 LOBULATUS. B.M. 



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

 f. 4, 4fl?'. 



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. 119. 5. t. 6. f.l J . 

 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 <? <f . 

 Hab. Para. 



17- ZETHUS HILARINUS. 



Zethus Hilarinus, Sauss. Mon. Guepes Sol. Supp. 120. 7. t. 6. f. 6 $ . 



Hab. Brazil. 



