-JO HYMENOPTERA OF AMERICA. [PART [. 



11. E. regulUS Sauss. (Fig. 7, la, 76.) — Miuutus, niger, subsericeus ; 

 thorace uiiuore, sparse cribrato-puuctato; abdoruiue polito; olypeu 

 sabeinarginato ; antennis subtus etpiouoti margine antioo, ferrugineis; 

 pan. 'to froutali, margiue postico pronoti, post-scutelli et abdominis seg- 

 me utorum 1 -, liavrU; alis iui'uscatis, stigmate opaoo ; tegulis feiru- 

 gineo-marginatis. 



Eumenes regulus r±v<>. Rev. et Mag. de Zool., IX, 1857, 272. 

 Total length, 7^ mill.; wing, (3 mill. 



9. Very small. Head densely punctured. Ocelli placed in a 

 line very little bent, nut forming a triangle. Clypeus delicately 

 punctured, convex, having its extremity pointed, hardly notched 

 um [ bidentate. Thorax strongly cubical, offering all the charac- 

 ters of the division, cribrose with large deep scattered punctures; 

 angles of the prothorax a little raised. Metathorax flattened 

 convex, only divided by a line, cribrose like the rest of thorax. 

 Petiole as long as the thorax, polished, not cribrose, linear as far 

 as the middle, then enlarged triangularly, bossed, swelled above 

 al die extremity and finally bordered with a salient yellow cordon, 

 winch is preceded by a transverse channel; the pyriform part 

 of the abdomen very small. Second segment globularly bell- 

 shaped, depressed, wider than long, flattened beneath, convex 

 above, polished, offering a satin-gray reflection; its hinder border 

 rather concave, cut out. 



Insect black, clothed with a silvery pile: mandibles, the scape 

 and extremity of the antennae beneath and a point between their 

 insertion, ferruginous; posterior border of the orbits and a point 

 in their sinus, yellow or ferruginous; anterior border of the pro- 

 thorax ferruginous ; the posterior one margined with a yellow 

 hand, which makes an angle with a ferruginous or yellow fascia 

 placed on tiie sides before the wing scale. Anterior margin of 

 BCUtel, post-scutel, and a line on each side on the edge of the 

 metathorax, or only a spot on each side on its summit, yellow; 

 wing scale ferruginous or bordered with brown, the post-tegular 

 process yellow. Often there is on the thorax something of brown. 

 Petiole often having its middle and a line on each side ferrugi- 

 nous; its hinder margin adorned with a yellow border, fused with 

 a yellow s],,,t on each side of its extremity. The second segment 

 margined with yellow. The other segments black, or bordered 

 by a yellow or testaceous subniarginal slightly sinuous band. Feet 



