94 HYMENOPTERA OF AMERICA. [PART I. 



Bess. a. cliff. — This handsome species has no similarity to any 

 but the E. flavicornis, and to the E. Wagneriana, from which it 

 is easily distinguished by its notched clypeus and its body with- 

 out sculpture. 



Hab. The gulf side of Mexico. Tampico. 



Observation. — One can discover with a strong magnifier, a fine 

 sculpture on the thorax and elsewhere ; the scutellum in particu- 

 lar is very finely punctured, but we only speak here of characters 

 easy to discover and relative to those of other species. 



b. Body punctured. Petiole elongate; its dilatation fiattened-elongate, parted 

 by a groove, not sensibly margined. (Passage to the Division Zeta.) 



34. E. flavicornis Sadss. — Validus, earbonarius, E. Wagneriano 

 simillimus, at clypeo truncato, baud bicarinato; antennis, clypeo, 

 orbitis, macula frontali mandibulisque apice, aurantiis; antennis £ 

 apice baud uucinatis, sulco minuto subtus notatis. Long. 25 mm. 



E. flavicornis Sauss. Et. Vespid., Ill, 141, 27; pi. vii, fig. 4, % (Syn. 

 excl.). 



Hab. Venezuela. (Museum auctoris.) 



35. E. WagnerianilS n. sp. — Niger, sericeus; tborace dense punc- 

 tato, petiolo depresso, sulco partito; clypeo <j? valde bicarinato, apice 

 subexciso; alis nigro-violaceis. 



Total length, 23-24 mm. ; wing, 21 mm. 



9. Large, black, shining; head and thorax finely punctured. 

 The whole body clothed with a fine grayish pile. Clypeus rather 

 rugose, punctured and striate, lengthened and widely truncate at 

 its inferior border and slightly notched, its angles rounded, 

 receiving two strong parallel distant carinas which cross the 

 clypeus for about two-thirds of its length. Prothorax slightly 

 retracted, rimmed ; its angles a little salient. Abdomen de- 

 pressed, smooth, and silky, with silvery reflections; enlargement 

 of petiole flattened, wide, and lengthened, divided by an impressed 

 line. The whole body of a deep black. "Wings of a deep brown, 

 with violet reflections. 



Bess. a. diff. — This species very much resembles — 

 1st. The E. azlecus, from which it is distinguished by its dis- 

 tinctly punctured thorax, by its much longer clypeus, rugose, 

 more flattened, not bidentate ; by the enlargement of the petiole, 



