1G4 HYMENOPTERA OF AMERICA. [PART I. 



oculari, macnla snbalari, punctis 2 scutelli, pionoti margins et abdomi- 

 nis vittis 4 vel 5, % 6, til.iic-que sulfureis. 



9 . Total length, 17 nun. ; wing;, 13 rum. 

 ^ . Total length, 14 mm. ; wing, 1U mm. 



Odynerus capra Sauss. Rev. Zool., IX, 1857, 273. 



Form quite slender as with the 0. unifasciatus, but of larger 

 size. Head and thorax cribrose with moderately dense punc- 

 tures. Clypeus widely pyriform, convex, punctured, terminated 

 by a border almost straight, but impressed and smooth in the 

 middle, so that it even appears a little bidentate. Head and 

 thorax densely punctured. Vertex offering at times a double 

 impression toward the middle of the posterior border. Thorax 

 lengthened ; angles of the prothorax feebly indicated ; metathorax 

 having two or four longitudinal grooves. Post-scutei large, a 

 little truncate, but without any sharp ridge, slightly bossed, and 

 cribrose with punctures as far as the trench ; metathorax rugose ; 

 its posterior part wide, shining, punctured, and bordered all 

 around by a salient cordon which forms at the summit two 

 distinct angles and upon each side an angle, at times subdenti- 

 form; this plate beyond divided by a medial carina into two 

 pentagons. Abdomen a little depressed, finely punctured, more 

 distinctly upon the 1st segment and on the border of those fol- 

 lowing, but the borders not channelled nor upturned; the first 

 segment distinctly truncate, its suture very salient ; its superior 

 face trapezoidal, as with the 0. unifasciatus, but wider and 

 shorter. 



Insect black, clothed with a grayish or ferruginous pile. A 

 spot at the base of the mandibles, two arcuate spots on the 

 summit of the clypeus, a dot on the front, and another behind 

 each eye; two triangular spots forming a bilobate border on the 

 prothorax terminating in a clot upon each side ; a spot beneath 

 the wing and two upon the scutellura, yellow. Antennae black, 

 with the flagellum beneath ferruginous or yellow, and carrying a 

 yellow line upon the scape before. Wing scale spotted with 

 black, with brown and with yellow. Abdomen shining; its seg- 

 ments 1-4 or 1-5 regularly bordered with yellow. Feet black; 

 tibire yellow, at least above; tarsi brown or ferruginous. Wings 

 transparent, feebly washed with brown along the nervures and in 

 the radial. 



