174 HTMENOPTERA OF AMERICA. [PART I. 



tegulis, fascia scntelli et post-scutelli, metanoti angnlis adominisque 

 segmentorum 1-3 margine, pallide flavis ; alis autice fusco-inarginatis. 

 £ . Clypeo bideutato luteo. 



Anc. Clarazianus Sacss. Rev. de Zool., 1ST0, 55, 3, £ % . 

 9 . Total length, 12 mm. ; wing, 10 mm. 

 % . Total length, 10 mm. ; wing, 8 mm. 



9. Body stubbed. Head rather large, the vertex transverse, 

 imt convex; ocelli set in depressions. Thorax slightly convex; 

 prothorax having each of its angles extended into a lamellar 

 rounded process, which is separated from the anterior margin by 

 a wide notch. Disk of mesothorax parted by a longitudinal 

 groove, and posteriorly bicarinate; the carinas sinuous, terminating 

 at the angles of the seutel. Scutel parted by a groove and 

 separated from the mesothorax and post-scutel by deep furrows. 

 Post-scutel truncate, elevated into a high crest, rather concave 

 behind; the crest broadly emargin ate, forming two nearly trian- 

 gular lamellar teeth. Metathorax much excavated, margined 

 with very sharp edges; the lateral angles produced into strong 

 spines, the upper arcuated vt\>j:v> very salient, rather crested; the 

 inferior edges forming on their lower part, each a triangular 

 tooth. Head and thorax above coarsely aud roughly punctate ; 

 thorax on the sides and behind finely punctate and covered with 

 silky, silvery pile. Abdomen short, finely punctured, silky, with 

 gray-golden reflections, the first segment nearly as wide as the 

 second, short, its suture transverse, very distinct. 



Black. Antennae black, the 1st ami 2d joints rufous beneath ; 

 head and mandibles rufous or orange-red, about the antennas and 

 a little on the vertex black. Anterior margin of the prothorax 

 very delicately rufous; posterior margin of prothorax, a spot 

 beneath the wing, a, band on the scutel and one on the hinder 

 part of post-scutel, the angles of metathorax, and the inferior 

 tie yellow; the crest of post-scutel also yellow, finely 

 margined with black on its hinder face. Tegulao rufous, margined 

 with pale yellow; the process next to them yellow. The first 

 three abdominal segments adorned with a regular yellow margin; 

 the first narrow, fusing on each side into a little lateral spot; the 

 id widest, the third narrowest. Feet brown or passing into 

 ferruginous ; tibiae, the 1st and 2d anteriorly, and the extremity 

 of 2d femora, marked with yellow. "Wings hyaline; anterior 

 margin and radial cell brown. 



