EUMENES. 103 



46. E. Americanus Sauss. — Niger, dense punctatus, ferrugineo- 

 hirtus; petiolo gracili ; antennis ferrugineis, apice nigris ; pronoto, 

 tegulis, scutelli niargine, metanoti et petioli lateribus, ferrugineis ; post- 

 scutello, abdominis segmentorum marginibus, secundi fascia utrinque 

 lateral i et pedibus, runs vel aurantiaois ; alis sabferrugineis. 

 E. Americanus Sacss. Vespides, I, 39, 13 (1852). 



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



Form of E. fraternus, but smaller and a little more slender. 

 All the body feebly shagrcened or rather cribrose; the thorax 

 with confluent punctures ; not very rough. Clypeus bidentate, 

 yellow, covered with a silvery pile, in both sexes. Thorax short, 

 quadrate. Petiole lengthened, slender, gradually enlarging, 

 insensibly bidentate in the middle, cribrose with slightly separated 

 punctures, and bordered at its posterior extremity with a salient 

 cordon, parted by a middle groove. Second segment compressed, 

 flattened beneath, ver}' convex above, densely punctured, and 

 carrying toward the middle of its posterior margin a transverse 

 depression. 



Insect black, covered with an abundant ferruginous pile ; the 

 black passing much into ferruginous; mandibles ferruginous, 

 black at base ; a spot between the antennae, margin of the notch 

 of the eyes and a line behind them, yellow ; the prothorax, wing 

 scale, sides of metathorax, and a spot under the wing, the post- 

 scutel, the anterior border of the scutellum and the sides of the 

 petiole ferruginous or rufous. The second segment ferruginous- 

 brown. The two borders of the prothorax and that of the 

 petiole, in general marked with a yellow edging; post-scutel, a 

 wide border on all the segments of the abdomen, and often two 

 spots on the petiole, orange; the border of the second segment 

 very wide in the middle (not emarginate) being narrower at the 

 sides and often confounding itself with two } r ellow oblique spots 

 or lines, which occupy the sides of the segment. The abdomen 

 ferruginous beneath; legs ferruginous, with the tibia? and the 

 tarsi yellow and the thighs above sometimes blackish. Antennae 

 ferruginous, black above on the six last articles. Tlie scape 

 yellow beneath. Wings transparent, with ferruginous nervures, 

 at the end grayish. 



■ ?. Clypeus marked with an orange spot at base and in the 

 middle ; its teeth acute. 



% . Clypeus narrower, sulphur-yellow ; hook of the antennas 

 ferruginous. 



