228 Journal Xew York Entomological Society. C^o'- ^I-^- 



second submarginal near tip, second recurrent arises scarcely its length out on 

 anal cell and curves up, meeting third submarginal before the middle. 



Male. — Similar ; more slender, heavier antennae, and long spur of hind 

 tibia is about three fourths the length of metatarsus. 



Length 4.5 to 6 mm. 



From Boulder and Florissant, Colo., in April, May, June and July 

 (Rohwcr) ; type in National Museum, cotype in coll. Banks. 



Pompiloides consimilis, new species. 



Perhai)s but a variety of P. parvulns ; is rather larger, has stouter antennae, 

 the third joint not three times as long as broad, the pronotum less distinctly 

 angulate behind; the abdomen a little longer; the venation similar, but the 

 second recurrent vein arises much more than its length out on the anal cell, so 

 that the cell before it is much longer than in P. parvulus. 



From Florissant, Colo., June and July (Rohwer) ; type in National 

 Museum, cotype in coll. Banks. 



Sericopompilus plutonis, new species. 



Male. — Dull black, rather brown pubescent in part ; clypeus brown pubes- 

 cent, slightly concave in front, no bristles nor hair ; antennae long and slender, 

 third joint much longer than the first, latter without hair ; very distinct groove 

 to front ocellus, latter one and one half diameter from' equal laterals, latter 

 plainly nearer to eyes than to each other, vertex straight across, inner orbits 

 distinctly concave above, straight beneath, face just above antennae and the 

 vertex with few erect hairs ; pronotum angulate behind, metanotum rather long, 

 nearly flat above, evenly rounded behind, no distinct median groove ; abdomen 

 depressed throughout, ventral segments with preapical row of hairs, legs long, 

 tarsi long and slender, long spine on hind tarsi nearly two thirds as long as the 

 metatarsus, spines on metatarsus not as long as width of that joint. Wings 

 (both pairs) black, not darker at tips ; second submarginal cell longer than 

 broad, third narrowed above, but not triangular, receiving the second recurrent 

 vein beyond the middle, this vein arising from middle of anal cell, the basal 

 veins interstitial, in hind-wings the cubital arises much before the end of the 

 cell. 



Expanse 18 mm. 



From Fedor, Lee Co., Texas (Birkmann). 



T.MiLP: OF Sericopompilus. 



1. Wings all black; no white mark on hind tibiae, body wholly black. . .plutonis. 

 Wings black only at tip, or near there 2 



2. Hind tibiae white at base above 4 



Hind tibiae not white at base above 3 



3. Long spur of hind tibiae three fourths of metatarsus; no white at tip of 



abdomen hirkinanni. 



