86 HYMENOPTERA OF AMERICA. [PART I. 



its lateral ridges sharp. Petiole as in Iturbide, elongate-pyriform, 



truncate, convex, not parted by a channel ; the hind margin 

 bordered, the border preceded by a transverse channel. The 

 resl of the abdomen depressed. 



Black, with a fulvous or purple-silky reflection. The extremity 

 of the labrum, the lateral borders of clypeus, a spot between the 

 ant>nn;e, a dot in the emarginaUoii of the eyes, the antennae 

 beneath, the end of mandibles, and a line behind the top of the 

 eves, tawny. The hinder margin of prothorax, an interrupted line 

 on the anterior margin, or only on its angles, a line over the 

 middle coxa;, tawny ; wing scale brown or ferruginous; two dots 

 on the anterior angles of scutel, a line on the post-scutel, and the 

 margin of segment 1st, 2d, yellow; the lamellar margin of 2d 

 segment and of those following, brownish. Beneath, the margin 

 of the segments fulvous. Feet ferruginous and blackish. Wings 

 hyaline, smoky, with iridescent reflection; the anterior margin 

 blackish. 



Var. The spots on the head and hinder margin of prothorax, 

 iw ; two yellow dots on the clypeus; scape of antennae almost 

 wholly ferruginous. 



Eess. a- diff. — This species is quite intermediate between the 

 Divisions Pachymenes, Alpha, and Omicron; or between E. 

 Santa-Anna, Iturbide, and callimorphus. The clypeus is biden- 

 tate and the abdomen elongate depressed as in the Pachymenes ; 

 but the thorax is not depressed, but on the contrary convex, not 

 polished as in E. Santa-Anna, but densely punctured, and the 

 petiole not so widened, not campanulate but gradually widened. 



It differs from E. Iturbide by its depressed, not globular or sub- 

 compressed 2d abdominal segment; its flattened clypeus with 

 spiniform (not lamellar) teeth ; its compressed triangular meta- 

 thorax ; its petiole without impressed point at tip, but with a 

 transverse submarginal channel. From E. callimorphus and the 

 other species of Division Omicron by its large size; its more 

 depressed and elongate abdomen ; its compressed, prominent 

 metathorax parted by a deep groove, and by its general resem- 

 blance to Division Alpha. 



lid,. .Mexico. The Oriental Cordillera. I caught 3 9 in the 

 neighborhood of Cordova. 



20. E. infernalis n. sp.— Gracilis, iiigerrnfo-ornatns ; clypeo T>iaen- 

 tato; thorace dense foramiiiato-puuctato ; abdomiue polUo, seguientis 



