72 IIYMEXOPTERA OF AMERICA. [PAET I. 



not distinctly bidentate at the end; by the opaque stigma of the 

 wing; and 1 » \- the much coarser puncture of the thorax. It differs 

 from E. aviculus by its smaller thorax, polished, impunctate 

 abdomen ; from thoracicus by its smaller, regularly convex 

 thorax; from Totonacus by its grayish-silky body, its pale yellow 

 ornaments, its narrow abdominal hands, and its wings in which 

 the 2d recurrent nerve is not interstitial, but falls into the 2d 

 cubital cell. This Eumenes much resembles Polybia occidentals, 

 parcula, etc, hut differs by its clypeus not angular and by the 

 punctures of the body. 



I/ii/j. The hot and temperate regions of Mexico. Tampieo, 

 Cordova, Orizaba. (I have taken several specimens, 9 % , at 

 Tampieo and at Cordova, 44 ?; 27 1 .) 



Fig. 7 represents the male enlarged : the petiole is a little too short, and 

 its pyrifqrni part too large. In the lig. 7c, the clypeus is not sufficiently 

 prolonged at the extremity, and too truncate. In the fig. lb, the abdomen 

 is too large. 



12. E. Totonacus n. sp. — Minutns, niger, nitidissimus ; thorace 

 punctata, petiolo elongate, lineari, apice trigonaliter dilatato; pronoti 

 margine postico, post-scutello, metanoti strigis 2, abdominis segmentorurn 

 h, 2' margine sat late, laete flavis, petiolo medio ferrugineo; alis iufu- 

 matis, 2" vena lecurrente interstitiali. 



9- Total length, 8 mill.; wing, 6J mill. 

 £. Total length, 7 mill.; wing, 51 mill. 



?. Quite similar to E. regvlus; only differing by the follow- 

 ing: Body more brilliant black, less grayish-silky. Clypeus 

 shining, delicately punctured, and its extremity parted by a groove, 

 subbidentate. Head finely punctured. Seutel convex, parted by 

 a strong groove. Metathorax parted by a groove up to the top 

 as in Reyulus, or still more strongly; more polished, punctures 

 more scattered. Petiole a little longer; all of the abdomen very 

 much polished. 



Black: A spot at base and extremity of the scape, and the 

 extremity of antennas beneath, tawny; a spot in the sinus of the 

 eye and one behind the summit, yellow or tawny; posterior mar- 

 gin of prothorax, post-tegute, post-scutel, ami angles of meta- 

 thorax, bright yellow; the middle of the petiole ferruginous; its 

 margin yellow: on each side a transverse line fused with the 

 yellow border ; the second segmenl with a rather broad yellow 



