ETJMENES. 95 



more lengthened, not bossed and divided by a strong groove; by- 

 its angulate prothorax,, etc. 



2d. The E. Jlavicornis, of which it has the form and the punc- 

 tuation. 



3d. The E. niger Brulle, from which it differs by its emarginate 

 clypeus, in the 9; by the more lengthened, less dilated enlarge- 

 ment of the petiole, etc. 



Eab. The Isthmus of Panama. (My collection.) This beau- 

 tiful insect was sent me by the celebrated traveller, Maurice 

 Wagner, of Munich. 



The flattened and sulcated petiole of the E. Wagnerianus and 

 Jlavicornis forms an exception to the species of the Division 

 Alpha, and approximates it somewhat to the Division Zeta, 

 although the petiole is too wide to allow it to be classed with that 

 Division. 



B. Smaller species, with the abdomen more globular or com- 

 pressed. The border of the petiole a little margined ; the 

 margin preceded by an impression. (Regular type of 

 Division Alpha.) 



a. Wings smoky, with violet iridescence. 

 36. E. Gbilianii Spin. 



Eumenes Ghilianii Spinola Hymen., rec, par Ghiliani, No. 61 (MSm. 

 Acad, de Turin, 1846).— Sauss. Vespides, III, 140, 26. 



Eab. Brazil. Para. (Mus. Spinola?, Taurinense.) 



3 1 ?. E. fraternilS Sat. — Niger, dense punctatus, cinereo-hirtus ; 

 abdoraine nitido; lineola verticali inter antennas, clypeo summo, pro- 

 noti margine, post-scntello, metanoti summi macnlis 2, abdominisque 

 segmentorum 1, 2 vel 1-3, margine, secundo maculis 2 lateralibus, sul- 

 fureis ; % clypeo toto luteo; segmentis abdominalibus 1-4 flavo-lim- 

 batis ; metanoto impunctato. 



$ . Total length, 17 mm. ; wing, 12 mm. 

 % . Total length, 13 mm. ; wing, 9 mm. 



Eumenes fraterna Say, Long's Sec. Exped., II, 344 (Append., 77), 1, % 

 (1825).— Say's Entomol. (Le Conte), I, 232, 2.— Sauss. Vespides, 

 I, 40, 17, 9 % . 



E.fervens Sauss. Vespides, I, 40, 15, 9 % (1852). 



E. maerops Sauss. ibid. I, 41, 18, % (var. ? 1852). 



E. minuta Sauss. ibid. I, 39, 14, % (Syn. exclus.). 



