110 IIYMENOPTERA OF AMERICA. [PART I 



obtuse angle, and forming two slightly diverging salient or obtuse 

 angles. 



Two spots at the extremity of clypeus, the lateral margins, 

 and the frontal carina, yellow. 



Ress. a. diff. — A very distinct species from all the others of 

 this Division by its very punctate compressed abdomen, and by 

 the much impressed edge of the 2d segment, which renders the 

 first edge very sharp. The other species have this edge flat, so 

 that the first edge is hardly distinguishable. 



llah. Brazil. (Author's collections and Spinola's at Turin.) 



Gen. MOXTEZUMIA Sauss. 



Mandibles very long, terminating in a point, channelled, and 

 forming by their union a long beak. Lip and jaw very long; 

 labial palpi presenting but three articles and often terminated 

 by long hairs. 1 Maxillary palpi composed of Jive articles. 



I/i ad normal; generally dilated behind the eyes, and a little 

 concave behind; between the antennae is a little carina which 

 reaches the clypeus. Clypeus ? longer than wide, pyriform 

 (that is, rounded at the summit, diminishing downward) ; emar- 

 ginate and bidentate; % polygonal, generally as wide as long, 

 and terminated by a nearly straight border placed between two 

 distant side teeth. 



77*o/7/./' generally lengthened, convex (at times wide) hardly 

 retracted before; prothorax very sharply truncate; metathorax 

 rounded, offering two convex faces, separated by a channel or by 

 a cavity, which are not bordered by sharp, but rounded, effaced 

 edges. 



Abdomen generally fusiform ; the first segment enlarges 



1 Although the 3d article has a parabolic form, one sees very distinctly 

 that it is the 4th which is wanting, for the 3d preserves at its extremity 

 the long stiff hairs which arm the 3d among the types which have the 

 labial palpi composed of four articles (Nortonia). Furthermore, one often 

 discovers that the extremity of the 3.1 article is formed by a rudiment of 

 the 4th article soldered upon it. This disposition hecomes more distinct 

 among the Monobia. 



