ODYNEIIUS. 185 



natis,10 et 2Q basi nigrescentibus ; seoundi margine perrugoso, maxime 

 canaliculato, et reflexo ; alis ferrugineis apice inquinatis. — £> . Clypeo 

 flavo, bidentato; vertice tuberculo nitido instructo. 

 Odynerus tuberculocephalus 1 Sadss. Vespides, I, 139, 22 ; pi. xvi, fig. 9, 



10a. 

 Odynerus tuberculiceps, Ibid. Ill, 205. 



$>. Total length, 13 mm.; wing, 11 mm. 

 % . Total length, 9 mm. ; wing, 8 mm. 



Clypeus pyriform, strongly punctured, truncate, and subbiden- 

 tatc at the extremity. Head strongly and densely punctured. 

 Behind the ocelli is a little, indistinct tubercle, shaped like a 4th 

 ocellus. Anterior ocellus very large. Thorax cribrose with large 

 distinct points. Angles of the prothorax a little prolonged, sub- 

 dentiform; scutellum divided by a groove. Concavity of the 

 metathorax appearing punctured or rugoscly striate, according 

 to the way in which it is seen, with the borders perfectly rounded; 

 there is only a little border at the summit in a feeble arch. 

 Abdomen punctured; the 1st segment narrower than the 2d, 

 bordered by a slightly salient cordon; the 2d having its margin 

 very strongly annulate, very strongly upturned, and very rugose, 

 a little sinuate in the middle. 



Insect clothed with long gray or ferruginous hai-r, abdomen 

 velvety. Head and thorax black. Mandibles, clypeus, a dot 

 upon the front, border of the eyes, interrupted at the summit, 

 prothorax, scutcl, wing scales, two spots beneath the wings and 

 two others on the metathorax, of a ferruginous red. Mcsothorax 

 with two red lines. Abdomen ferruginous, with the base of the 

 second segment and the anterior face of the first, blackish. 

 Posterior border of all the segments margined with yellow, but 

 this color often passing into ferruginous on the last segments. 

 Legs ferruginous; femora black or spotted with ferruginous. 

 Antenna} red, with the second moiety black above. Wings 

 washed with ferruginous, with the end brownish. 



%. Notably smaller. Clypeus bidentate, notched, yellow, as 

 well as the mandibles and a line on the scape of the antenme; 

 the flagellum with more of black; hook very small, ferruginous. 

 Tubercle on the vertex very much larger than that of the female, 

 distinct and shining. Concavity oi' the metathorax punctured, 

 with little or no superior border. Abdomen a little more com- 



1 Nomen mendosum. 



