HYMENOPTERA. 13 



18. ZETHUS AURULENS. 



Zethus aurulens, Sauss. Mon.Guepes Sol. Supp. 121. 8. t. 6. f. 5 ^ . 

 Hab. 'Brazil. 



19. ZETHUS DUBIUS. B.M. 



Female. Length 5i lines. Black : the head, thorax and 

 petiole closely and strongly punctured ; a minute spot above the 

 insertion of each antenna, and a similar spot behind the eyes, 

 yellow ; the anterior margin of the clypeus slightly emarginate 

 in the middle. A line on the anterior margin of the prothorax 

 laterally, a minute spot behind the tegulae, one on each side of 

 the scutellum, a transverse line on the post-scutellum, from the 

 lateral angles of which a line runs down the metathorax to the 

 insertion of the abdomen, yellow. A minute spot at the apex of 

 the femora behind, another at the base of the tibiae outside, the 

 intermediate femora with a stripe beneath, and a narrow line 

 on the tibiae outside, yellow; the wings subhyaline, the anterioi 

 margin of the superior pair fuscous. The dilated portion of the 

 petiole of the abdomen elongate-ovate, the apex with a yellow 

 band ; the apical margin of the following segments with narrow 

 yellow bands. 



The male differs in having the clypeus yellow and in having 

 the anterior margin of the prothorax entirely yellow ; otherwise 

 resembling the female. 



Hab. Brazil (Villa Nova). (Coll. II. W. Bates.) 



20. ZETHUS CARINATUS. B.M. 

 Male. Length 4 lines. Black : the head, thorax, and petiole 



of the abdomen coarsely punctured, a longitudinal carina extend- 

 ing the entire length of the dilated portion, which is elongate 

 and cylindrical. The clypeus, a minute spot in the emargination 

 of the eyes, another above the insertion of each antenna, the 

 scape in front, and a stripe on the mandibles, yellow ; the anterior 

 margin of the clypeus truncate in the middle. The anterior 

 margin of the prothorax, a minute spot on each side of the scu- 

 tellum and post-scutellum, and two longitudinal lines on the meta- 

 thorax, running down to the insertion of the abdomen, yellow ; 

 the anterior and intermediate tibiae outside, and the intermediate 

 femora at their apex in front, yellow ; the anterior tarsi rufo- 

 fuscous ; the wings subhyaline, the superior pair faintly clouded 

 at their anterior margin. The apex of the petiole of the abdo- 

 men, and the apical margins of the segments with narrow yellow 

 bands. 



Hab. Brazil (Villa Nova). (Coll. H. W. Bates.) 



