ODYNERUS. 167 



It has exactly the size and form of the 0. capra, but is dis- 

 tinguished from it by its metathoracic plate having sharper angles, 

 by its more truncate post-scutel, and by its second abdominal 

 segment being less punctured along the border; perhaps also by 

 its violet wings and the absence of spots beneath the wings and 

 on the seutellum, and by the absence of yellow bands upon the 

 3d and 4th segments. It is distinct from the 0. unifasciatus by 

 the border of the 2d segment, which is neither channelled nor 

 rugose. 



Hob.. The United States. Connecticut. Pennsylvania. Indi- 

 ana. Illinois. Tennessee. (G 9.) 



C. Body more gathered (not so elongate), normal, bat the thorax 

 is still sensibly longer than wide. 



c. Metathorax destitute of strong spines. 



12. A. albopliaieratllS Sauss. — Medius, niger, punctatus; pnncto 

 frontali et post-oculari, prouoti et abd. segiuentorum niargine, maculis 2 

 scutelli, 1 subalari, tegulisque, niveis ; 9 clypeo albido-bimaculato, et 

 antennaiuLu scapo subtus testaceo ; £ niandibulis, clypeo bispiuoso 

 lineaque scapi et pedibus albidis ; pronoto et metauoto bideutato. 



Odynerus alboplialeratus Sauss. Vespides, III, 217, 109. 



J . Total length, 13 mm. ; wiug, 10 mm. 

 £> . Total leugtk, 10 mm. ; wing, 8 mm. 



?. Size moderate. Head and thorax densely punctured.- 

 Clypeus widely pyriform, punctured, terminated by a little 

 straight or subemarginate border. Thorax mediocre ; prothorax 

 moderately wide ; its angles distinct ; mesothorax marked with 

 four grooves at its base, with two across the whole ; metathorax 

 rugose ; its posterior plate finely shagreened ; bordered by a 

 cordon which marks out the usual pentagon, which is but little 

 angulate, without lateral teeth. Abdomen ovalo-conit- ; the first 

 segment wide and truncate with a very distinct suture; the whole 

 abdomen quite finely punctured; the 1st segment most strongly. 



Insect black. A spot upon the front, another behind each eye; 

 a slender border on the prothorax, two dots on the scutellum, and 

 a regular border on every segment of the abdomen, whitish. 

 Antennae black; the scape testaceous beneath. Legs black, the 

 tibia? white above; tarsi slightly ferruginous. Wings transpa- 



