ODYNERUS. 179 



Hab. The temperate parts of Mexico. I caught a 9 near 

 Cordova. 



b. Post-scutel not truncate, ungulate posteriorly. 



This type has the post-scutel formed much as in Stenancistro- 

 cerus, but the form of the abdomen remains as in the division 

 Anciatrocerus, and the appearance remains also as in this group, 

 so that we have to leave it in the division Ancistrocerus, prop, 

 diet. 



22. A. camgnlatsis Sauss. — Gracilis, niger, nitidus, sulfureo-pictus, 

 pronoti angulis in processus 2 productis, antennis subtus et basi flavis ; 

 abdominis segmentis 1, 2 late flavo-marginatis ; primo antice truncato, 

 sntura prominula, fascia flava utrinque aucta marginato. — J % . CI7- 

 peo truncate, flavo. 



Odtjnerus cingulatus Cresson, Hymen, of Cuba, Ent. Proc, Phila., II, 

 1865, 1G2, J. 



£, . Total length, 9 mm. ; wing, 7.5 mm. 

 9 . Total length, 12 mm. ; wing, 9 mm. 



Rather small. Form slender, elongate. Head and thorax 

 punctured. Angles of prothorax strongly produced into blunt 

 processes. Scutel and post-scutel flattened, the former parted 

 by a deep groove. Metathorax rounded, rather roughly punctate; 

 its concavity strigose ; bordered by a rather distinct salient line, 

 but its angles obsolete and destitute of teeth. Abdomen delicately 

 punctured, most distinctly on the first segment and the border 

 of the others; 2d segment somewhat swelled above; the first 

 segment narrower than the second ; its suture elevated. 



Shining black. Antennas black, with their first two joints and 

 the under side yellow. A triangle on the forehead, a line behind 

 the eye, a broad fascia on the edge of prothorax, a spot under 

 the wing, the scutel, and post-scutel, yellow. The first two 

 abdominal segments with a broad yellow margin; the fascia of 

 the first widened on each side. Feet yellow; coxae and hinder 

 femora except at tip, black, intermediate coxae yellow anteriorly. 

 Wings clouded, principally at the end ; the anterior margin as 

 far as the stigma ferruginous. 



9 'o. Clypeus polygonal, longer than wide, yellow ; its interior 

 border narrowly truncate, tenuously margined with black. Man- 

 dibles dentate ; ferruginous, or yellowish, black at base and tip. 



