458 PROCEEDINGS OF THE ACADEMY OF [L898. 



Chartergus griseus n. sp. 



9 or $ . — Black ; head in front, cheeks, scape and pedicel of an- 

 tennse, orange ; tibiae and tarsi more or less brown, the anteriors pal- 

 est ; thorax and abdomen with a thin griseus pubescence, more 

 obvious on middle segment ; posterior margin of pronotum yellow- 

 ish medially as a rule. 



Clypeus obtusely angulate ; flagellum scarcely clavate ; ocelli 

 forming a high triangle, the space between hind pair much less than 

 that between them and the anterior one ; pronotum with a tolerably 

 long dorsal surface, much longer than in C. ater, sharply margined 

 anteriorly, and, with the dorsulum, rather coarsely punctured, 

 remainder of thorax similarly punctured ; postscutellum not tuber- 

 culate ; middle segment shallowly concave ; abdomen ovate ; wings 

 subhyaline, the anterior margin of the superiors, including the mar- 

 ginal cell, fuscous ; nervures and stigma black ; second submargiual 

 triangular, much narrowed above, the third rhomboidal narrowed 

 above, the outer nervure nearly straight. Length 1\ mm. 



Mararu, April ; Santarem. Nine specimens. 



CHARTERGINUS gen. nov. 



Head flat, transverse, the development of cheeks varying in the 

 different species, but less than in Chartergus. Front long and rather 

 narrow. Eyes long and narroiv, practically reaching base of man- 

 dibles. Mandibles slender, contracted medially, with four distinct 

 teeth on inner margin ranging from the apex, which is not trunca- 

 ted as in Chartergus or Polybia, but shaped somewhat as in Necta- 

 rinia. Maxillary palpi 6-jointed, the first and last joints longest; 

 labial palpi 4-jointed, the basal joint longest, the second and third 

 shortest. Clypeus truncate or acuminate at tip ; antennae, inserted 

 at base of clypeus. Thorax truncate anteriorly, shaped throughout 

 as in Chartergus, the scutellum scarcely raised above the level of 

 postscutellum, and not emarginate. Middle segment concave, the 

 sides not angularly produced or spinose ; tibial spurs 1-2-2. Abdo- 

 men with first segment campanulate, practically sessile with second 

 segment, ivith a basal petiole varying in length in the different spe- 

 cies, in some species almost wanting. Neuration of wings as in 

 Chartergus. 



Type: C.fulvus. 



Charterginus is intermediate between Chartergus and Nectarinia. 

 It is more closely allied to the former genus, from which it differs 



