114 IIYMEN0PTERA OP AMERICA. [PART I. 



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



triangular. ' 



3. M. brlliiea Sauss. — Velntino-sericea, punctata; clypeo pnnctato, 

 margiue apicali late truncato, biangulato ; tborace valde velutino, hand 

 corapresso; metanoto brevi, striato, aureo-sericeo ; IP abd. segmento 

 petiolari, conipanulato, apice sulco partito; capite et antennis uigris; 

 bis subtns ferragineis; thorace et petiolo rufis ; pronoti margine postico, 

 tegnlis, postscutelli maculis 2 petiolique linea marginali, flavescentibus ; 

 pronoto, thorace subtus et petiolo ante marginem frequenter fuscis ; 

 abdouiine fusco-olivaceo ; pedibus rufis; alis infumatis, costa fusca. 



Variat. Secnndo segmento ferrugineo-limbato. 



$ . Clypeo lato, sericeo. 



Pachymenes brunnea Sadss. Vesp. I, 7G, 4; pi. xii, fig. 6 (1852). 

 Total length, 1G mm. ; wing, 12 mm. 



This species lias rather the appearance of an Eumenes, because 

 of its narrow 1st abdominal segment, campanulate 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 M. infernalis, but is 

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

 men, and by its shorter thorax. 



Hab. Cayenne. Venezuela. 



Observation. — L. c. 1 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; nietathorax 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 campanulate; dilated nodulously 



