108 HYMENOPTERA OF AMERICA. [PART I. 



Var. a. Wholly ferruginous, with the wings obscure. 

 b. Abdomen black, with the end ferruginous ; petiole ferrugi- 

 nous, with a black margin. 



Hub. South America. 



51. E. Orbiguyi Sauss. 



Eument s Orbignyi Sadss. Etudes sur la Faru. Vespides, I, 09, 57 (1852). 



Hah. Bolivia. Probably a variety of the preceding. 



,V>. \ t . ClauHicodoiiScP n. sp. — Niger; capite et tborace ferrugineis, 

 fronte et mesouoto uigtiis ; tuberculis 2 obsoletis ferrugineis in fronte; 

 clypeo lato, etnarginato ; abdomine fere impunctato; petiolo mediocri, 

 laevi, vix sulcato, apice puncto impresso et maigiue ilavo ; alis iufus- 

 catis. J. 



Total length, 15-20 mm. ; wing, 12-1G mm. 



9. Head orbicular, longer than wide. Clypeus large, widely 

 but not deeply emarginate at its inferior border and a little bicari- 

 nate ; the carina' distant. Between the antennae an elongate 

 tubercle parted by a sulcosity, and over this, next to the top of 

 the eves, two frontal rounded tubercles; vertex arcuate. Thorax 

 elongate, compressed, anteriorly margined by a feeble crest. 

 Scute! convex, parted by a groove; nietathorax parted by a 

 channel, nearly to the top. Head and thorax delicately punctate. 

 Disk of mesothorax with two or four sulcosities at base. Petiole 

 moderate, polished, impunctate, as long as the thorax, a little 

 gibbous in the middle; its sulcosity very obsolete; the end 

 without elevated margin, but with an impressed point. The rest 

 of the abdomen elongate, pear-shaped, not compressed, nearly 

 impunctate, except along the edge of the margins; the second 

 edge obsoletely separated from the first. 



ll.ad ferruginous ; the forehead black, with its three tubercles 

 ferruginous; antenna- ferruginous; the flagellum black above. 

 Thorax ferruginous, beneath and in the grooves of the sides, 

 Mack; disk of niesothorax black. Abdomen black; the petiole 

 margined with yellow. Feet ferruginous, varied with fuscous. 

 Wings washed with brown; the costa more obscure. 



Ress. <i. diff. — Nearly of the same coloration as E. canalicu- 

 latus, but smalh r; the head less broad, not so triangular, distinct 

 by its two frontal feeble tubercles; the thorax much narrower, 

 mure margined anteriorly, more canaliculate posteriorly; the 



