G2 HYMEXOPTERA OF AMERICA. [PART I. 



humped, the boss divided by a groove ; its extremity bordered 

 by a salient band. 



a. Thorax rather compressed, lengthened. 



1. E. sericeus Sauss. — Gracilis, fusco-niger ; thorace couipresso ; 

 pedibu.s, petiolo et thorace supra ferrugineo-fulvis ; hoc valde fulvo- 

 velutiuo ; alis subhyalinis, costa fusca. J. 



Pachymenes sericea Sacss. Vespides, I, 74, 1 (Syn. excl.) ; pi. xii, fig. 5; 

 HI, 153. 



Total length, 19 mill. ; wing, 15 mill. 



9. Slender; thorax compressed, rather narrow anteriorly. 

 Head black; clypeus bicarinate at the extremity, bidentate or 

 notched; the inner orbits and a line behind the eyes rather yel- 

 lowish. Antennas at tip a little ferruginous beneath. Thorax 

 blackish, but having its upper parts ferruginous or ornamented 

 with yellowish, and all covered, as well as the sides, with velvety 

 fulvous hair, rather woolly, which makes it quite fulvous. Petiole 

 slender, ferruginous velvety; its base brown, its extremity a little 

 obscure with a more yellowish border; the rest of the abdomen 

 of a brown-olivaceous color. Feet ferruginous, more or less 

 brownish or yellowish. 



Bess. a. diff. — Very much resembles auratus, from which it 

 differs principally by its quite woolly, velvety hairy thorax and 

 by its less bidentate clypeus. 



Hab. Brazil. Bahia. (Paris museum.) 



2. E. aisratus n. sp. — Fulvo-olivaceus ; capite fusco; elypeo bie'en- 

 tato, apice testaceo-marginato ; thorace aureo-sericeo, compresso, meta- 

 noto valde angusto, sed pronoto antice hand coarctato, petiolo cainpa- 

 nulato, gibboso, sulco subpartito, apice puncto impresso, basi nigro ; 

 mandibulis. orbitis, pruuoti marginibus, mesonoti et metauoti fasciis 2, 

 scutellis, tegulis et macula subalari, frequenter testaceis ; alis pauluni 

 ferrugineis. $ • 



Total length, 17 mill. ; wing, 13 mill. 



? . Insect slender, of an olive-brown, rather velutinons. Head 

 blackish, with the orbits somewhat bordered with testaceous; 

 clypeus flattened, a little bicarinate, toward the end strongly 

 bidentate; its teeth spiniform, separated by a triangular notch; 

 its extremity and its inferior border yellow-testaceous, as well as 

 the mandibles. Antennas ferruginous beneath, especially toward 





