HYMENOPTERA. 129 



metathorax, the pectus, the coxae and femora in front, yellow ; 

 the tibiae and tarsi ferruginous and more or less fuscous above; 

 the wings hyaline, the anterior margins of the superior pair yel- 

 lowish, with a fuscous cloud in the marginal cell, the nervures 

 ferruginous. Abdomen : the petiole elongate, with its apical 

 margin as well as that of the following segment with a yellow 

 fascia ; beneath, the abdomen is more or less ferruginous in the 

 middle, the apical margin of all the segments yellow. 



Hob. Mexico. 

 This is probably the male of Polybia pediculata. 



37. POLYBIA INFERNALIS. 



Polybia infernalis, Sauss. Mon. Guepes Soc. 195. 36. t. 25. f. 3. 

 Hab. Para. 



38. POLYBIA CECODOMA. 



Polybia oecodoma, Sauss. Mon. Guepes Soc. 195. 37. t. 25. f. /. 

 Hab. Brazil (Bahia). 



39. POLYBIA FASTIDIOSUSCULA. B.M. 



Polybia fasti diosuscula, Sauss. Mon. Guepes Soc. 197.39. t.25. f.4. 

 Hab. Brazil. 



40. POLYBTA CARBONARIA. 



Polybia carbonaria, Sauss. Mon. Guepes Soc. 198. 40. t. 26'. f. 5. 

 Hab. Brazil. 



41. POLYBIA CORDATA. B.M. 



Female. Length 4 lines. Black : the clypeus smooth and 

 shining, its anterior margin forming an obtuse angle. The pos- 

 terior margin of the prothorax, a connected oblique stripe beneath 

 the' wings, the posterior margin of the tegulae, a minute spot at 

 the lateral angles of the scutellum and the post-scutellum, yel- 

 low; the wings hyaline and iridescent, with a dark fuscous spot 

 occupying the marginal cell and the apex of the externo-medial 

 cell ; the nervures dark towards the base of the wings and pale 

 towards their apex. Abdomen heart-shaped ; the first segment 

 with a narrow yellow fascia on its apical margin, the following 

 segments with a broad fascia ; the fasciae slightly notched in the 

 middle and emarginate on each side ; the fascia on the second 



G 5 



