EUMENES. 



tt 



top, or bordered with yellow on its lateral margins, or entirely 



black. 



I . Clypeus yellow, covered with a silvery pile ; the flagellum 

 of the antennae more ferruginous at base, black in its second 

 part, with a moderate ferruginous hook. Thorax a little more 

 elongate. 



Var. Clypeus bordered all round with black. 



Var. In both sexes, the teeth of the clypeus are more or less 

 spiniform, sometimes the notch between them is filled by a little 

 arcuated border, which makes the teeth short and not spiniform. 

 The dilated part of the petiole is more or less wide; more or loss 

 Indent ate, or not bidentate ; the frontal and mesothoracic sulcosity 

 not distinct. 



a. Clypeus and head entirely black. Anterior border of the 

 prothorax and scutellum black. Petiole without ferruginous. 



b. Clypeus margined on both sides with yellow. 



c. Mesothorax with two rufous lines; scutels bordered with 



yellow. 



d. The metathorax and mesopleime passing to ferruginous. 



e. The end of petiole mixed with brown, or with two transverse 

 lines, smelted with the yellow border. 



/. Abdomen passing to brown. 



g. The yellow marking of the thorax more or less wanting; 

 no spot on the wing scale. 



Bess. a. diff. — This species is very near to the E. calUmorphu* 

 Sauss., but is distinguished from it by certain characters difficult 

 to describe. The clypeus is flatter; its teeth are a little shorter; 

 the ocelli are placed upon a less arcuate line, and the vertex has 

 two transverse grooves between the summit of the eyes and the 

 external ocelli. The thorax is more coarsely and less densely 

 punctured and above all wider and larger in proportion; its 

 angles are a little upturned at the shoulders. The petiole is 

 shorter; its dilatation is more funnel shaped, less pyriform. The 

 second segment seen from above is a little more sinuous, which 

 renders the lamellar edge more salient. The abdomen is more 

 distinctly punctured. The coloration, finally, is strongly analo- 

 gous. Distinct from E. regulus and totonacus by its larger 

 size, and its flattened, bidentate clypeus, etc. Differs from E. 

 olmecus by its smaller size, punctate, not velutinous thorax, more 



