114 IIYMENOPTERA OF AMERICA. [PART I. 



c. Head lessjlat ; clypeus truncate or notched; petiole rather flattened 

 triangular. 



3. iff. "brunea Sauss. — Yelutino-sericea, punctata ; clvpeo punctato, 

 margiue apicali late truncato, biangnlato ; tborace valde velutino, haud 

 corupresso; nietanoto brevi, striato, aureo-sericeo ; l c abd. segmeuto 

 petiolari, couipanulato, apiee sulco partito; capite et antennis nigris; 

 bis subtus ferrugineis ; tborace et petiolo rufis ; pronoti margine postico. 

 tegulis, postscutelli maculis 2 petiolique linea lnarginali, flavescentibus ; 

 pronoto, tborace subtus et petiolo ante margineru frequenter fascis ; 

 abdomine fusco-olivaceo ; pedibus rufis ; alis iufumatis, costa fusca. 



Variat. Secundo segmeuto ferrugineo-limbato. 



% . C'ypeo lato, sericeo. 



Pachymenes brunnea Sauss. Vesp. I, 76, 4; pi. xii. fig. 6 (1852). 

 Total lengtb, 16 mm. ; wing, 12 mm. 



Tins species has rather the appearance of an Eumenes, because 

 of its narrow 1st abdominal segment, campannlate as in Pachy- 

 menes, but quite flattened, and not bordered at end. 



The clypeus % is polygonal, as wide as long, broadly truncate; 

 its inferior margin having a tooth on each side; it is black, silky, 

 with the inferior part yellow. 



The body is velutinous ; the thorax very much so, rufo-ferru- 

 ginous with golden reflections; anteriorly blackish ; the petiole, 

 broadly club-shaped, parted by a groove, is ferruginous, with the 

 extremity blackish, and the hind margin finely bordered with 

 yellow. The rest of the abdomen brown-olive, with golden 

 reflections. The feet of the color of the thorax. 



Bess. a. diff. — It has much the livery of 31. infernalis, but is 

 very different by the petiolar form of the 1st segment of the abdo- 

 men, and by its shorter thorax. 



Eab. Cayenne. Venezuela. 



Observation. — L. c. I have mentioned that the 2d cubital 

 cell of the wing is triangular in 9, but this seems to be a mere 

 accident; it is not so in %. 



Division METAZUMIA. 



Head more or less dilated ; metathorax convex at summit a 

 little prolonged and presenting a distinct fossette, but unarmed. 

 Abdomen pyriform, but the first segment retracted, subpediculate 

 at the base, then suddenly campannlate; dilated uodulously 



