ZETHUS. 



55 



Zethus niger Sauss.- Vespides, I, 1852, 21, 24, pi. viii, fig. 9. 2 

 A Z. Romandino differt metanoto carinato, foveolato et plicato; petiolo 

 globosiore et minus valde punctata; secundo abd. segmento globosiore, 

 magis pedunculato, et punctatiore ; segmentis 3-5 minus punctatis; tertii 

 margine in medio producto. 



Hab. Cayenne. 



51. Z. didymogaster Spin. 



Zethus didymogaster Spin. Ann. Soc. Ent. Fr., 1841, X, 133, O. 



Hab. Cayenne. 



This species differs from Z. binodis in its very wide clypeus, 

 having a straight border, armed with two distant teeth. (Has 

 not the author taken a male for a female ? Only the males have 

 the clypeus twice as wide as long.) 



52. Z. fuscus Perty. 



Didymogastra fusca Perty, Delect. Auim. Artie. 145, pi. XXVIII, fig. 5, 



9 , 1830. 

 Zethus fuscus Sauss. Vespides, I, 19, 21; III, 120. 



Hab. Brazil. Amazon. 



53. Z. Smitliii Sauss. 



Zethus Smilhii Sauss. Vespides, III, 122, 9, J. 

 Metanoto striato ; alis fusco-cyaneis. 



Hab. South America. 



SPECIES WHICH I DO NOT KNOW. 



The following species of the genus Zethus, all from Brazil, 

 have been described by Fred. Smith in the Catalogue of the 

 Vespidae of the British museum, page 11-18. 



Z. pallidus — sculpturalis — dubius. 



Z. carinatus — albopictus — gracilis — Isevinodus. 



1 Typns in auctoris mnseo. 



2 Errata. Fig. 8, pi. viii, Vespides, I, does not represent tbis species, 

 but Z. piriformis. 



