10 HYMENOPTEUA. 



snbhyaliue. and with a fuscous stain along the anterior margin of 

 tho su])t'ri()r jiair. Tlu; petiole" of the abdomen elongate and 

 cylindrical, the apex of the abdomen ferruginous. 



Hab. Port Natal. 



This insect may, when more specimens can be obtained, and 

 the jiarts of the mouth examined, prove not to belong to the 

 genus Zethus, and it is {)laced there with a doubt ; it is repre- 

 sented by a single exam))le in the Collection. 



Div. III. — Species of South America. 



3. Zethus Brasiliexsis. 



Zethus Brasiliensis, Sauss. Mon. Guepes Sol. 10. 2 ? . 

 Hab. Brazil. 



4. Zethus chalybeus. 



Zethus chalybeus, Sauss. Mon. Guepes Sol. 10. 3 ? . 

 Hub. Brazil. 



5. Zethus carbonarius. B.M. 



Female. Length 17 lines.— Shining jet-black, except the 

 Hagellum, which is fulvous beneath, obscurely so at the base; 

 the clvi)eus finely striated longitudinally, and covered with di- 

 stant shallow punctures ; above the clypeus the head is finely 

 punctured. The thorax finely punctured, the metathorax with 

 a fine short silky cinereous pubescence ; the posterior legs 

 within and the tarsi have a similar ])ubescence ; the wings 

 brown, darkest along the anterior margin of the superior pair. 

 The dilatation of the i)etiole of the abdomen nearly ovate, and 

 as well as the second segment, impunctate ; the apical edge of 

 the membrane of the second segment yellow ; the following seg- 

 ments with shallow ])unctures ;' the abdomen punctured beneath, 

 except the petiole and the base of the second segment. 

 Hab. Brazil (the Amazons). (Coll. 11. W. Bates.) 



6. Zethus magnus. 



Zethus magnus, Sauss. Mon. Guepes Sol. 11. 4. t. 8. f. 5 <? . 

 Hab. Brazil. 



7. Zethus lugubris. ^•^^• 

 Zethus lugubris, Pertij, Del. Anim. Art. 144. t. 2S. f. 4, 



Sauss. Mon. Guepes Sol. 11. 5 J ? • 



Hab. Brazil. 



