360 Annals Entomological Society of America [Vol. X, 



by the smaller lateral teeth on the petiole which can not be 

 seen when the insect is viewed dorsally, and by the shghtly 

 shorter second segment of the gaster. 



Eumenes robustus new species. 



Female. — Length, 13.5 mm.; wing, 11.25 mm. Clypeus longer than 

 wide, lateral angle midway between base and apex, apical emargination 

 rounded and very shallow, surface densely and coarsely punctate; 

 thorax convex ; propodeum with median furrow shallow ; petiole campan- 

 ulate but not distinctly so, linear for nearly half its length then 

 becoming comparatively wide, widest at apex, lateral teeth not visible 

 dorsally; second segment convex when viewed either dorsally or laterally, 

 angles not distinct; punctations of the petiole of medium coarseness 

 and density, finer and sparser on the second segment. Black; clypeus 

 except a central spot, a line on the anterior aspect of the scape, a ridge 

 between the antennae, anterior margin of the prothorax, tegulffi except 

 a central spot, a spot below the tegulae, a spot on either side of the 

 scutellum, metanotum, a spot on the propodeum on either side of the 

 metanotum, a spot on either side of the petiole, a large obHque cuneiform 

 spot on either side of the second segment of the gaster, apical cordon 

 of the petiole, wide apical margin of the second segment both ventral 

 and dorsal, and the succeeding segments except the basal margins of the 

 sternites, legs beyond the bases of the femora, yellow; a spot in the 

 center of the tegulas, rufous; wings hyaline with golden reflections. 

 Body covered with fine golden pile. 



Male. — Length, 13.5 mm.; wing, 11 mm. Clypeus narrow, with 

 lateral angle much nearer apex than base, yellow; hook of antennae, 

 brown; no yellow on propodeum. Otherwise as female. 



Described from one female from Beulah, San Miguel Co., 

 N. M.; and from one male from Williams, Coconino Co., 

 Ariz. The National Museum also has specimens from Ft. 

 Collins, Larimer Co., Colo, and from Oregon. 



Type.— Cat. No. 21382, U. S. National Museum. 



Although not as long as fraternus this species is the most 

 robust in the group. This character and the distinct markings 

 readily distinguish this species from any of the others. 



Eumenes enigmatus Viereck. 



Eumenes enigmatus Viereck, H. L., Trans. Am. Ent. Soc, vol. 33, 1908, p. 389, 

 pi. 12. 



Distribution. — Flagstaff,' Coconino Co., Ariz. (Viereck); 

 Ornsby Co., Nev. ; Boulder Co., and Florissant, Teller Co., 

 Colo. 



Type. — Snow Collections, University of Kansas, Lawrence, 

 Kansas. 



