ODYNERUS. 285 



b. Posterior plate of metathorax less excavated; its marginal edges but slightly 

 salient, although still sharp. Abdomen ovate-conical, slightly attenuated 

 at base. 



102. O. foramanatlis Sauss.— Niger, confertim pimctatus; metanoti 

 rugosi foveola rotundata, striata, utrinque inerrai, marginibus rotun- 

 datis, hand acutis, snperne tantum in dentem verticalem excurrentibus, 

 a post-scutello perfissnram sejunctnm; macula frontali et post-ocnlari, 

 linea in scapo, pronoti et abdominis segmentorum marginibus, tegulis, 

 post-scutello, macula subalari, tibiis tarsisque, sulfnreis ; alis diaphanis 

 fnsceseentibus. — 2- Clypeo piriformi, biangulato, uigro, supra fascia 

 arcuata flava. — £ . Clypeo polygonali, vix emarginato, flavo. 



9- Total length, 13 mm. ; wing, 11 mm. 

 % . Total length, 11 mm. ; wing, 10 mm. 



Odyn.forarninatns Sauss. Et. Vespid. I, 180, 73, $' (1852) ; III, 232. 

 Odyn. rugosus Sauss. Ibid. I, 179, 72, % (1852). 



9. Smaller than the 0. Megsera. Clypeus pyriform, longer 

 than wide, strongly punctured, terminated by a little straight 

 border, the angles of which are formed like two little teeth. 

 Thorax having almost the same form as in the 0. Megsera, 

 although a little narrower; the head and the thorax strongly 

 punctured. Post-scutel finely crenulate. Metathorax rugose ; 

 its concavity striate, rounded, being scarcely bordered, but its 

 borders blunted by punctures which are continued with those of 

 the superior face of the metathorax; one sees, however, the 

 superior ridges slightly defined on each side ; all on the summit 

 forming a little vertical and sharp tooth placed on each side 

 behind the post-scutel and separated from this last by a fissure. 

 Lateral faces of metathorax finely rugose, becoming coarser 

 toward the posterior border. Abdomen densely punctured, not 

 being conical as in the preceding species, but rather ovalo-conic, 

 widening slightly as far as the extremity, or as far as the middle 

 of 2d segment; the first segment rounded, though truncate; a 

 little widened behind. The border of 2d and the following seg- 

 ments very coarsely punctured; that of the 2d a little depressed, 

 but not offering a clearly defined impressed zone ; the punctures 

 gradually augmenting in size ; the following segments cribrose 

 with great pits. 



1 Enatum. Line 7th from the bottom, in place of: e'eusson, read: post- 

 e'eusson. 



