186 WILLIAM J. POX. 



66. Crabro flaviclypoii!^ n. sj). 



9. — Anterior margin of cly])eus truncate in the middle with a distinct tooth 

 on each side ; head distinctly punctured, most strongly on front and vertex, and 

 finest on occiput; furn)W running from each liind ocellus to the inner orbits and 

 depression in which the fore ocellus is situated, not so distinct as in pinguis ; a 

 tolerably well-marked furrow extends back from the fore ocellus; space between 

 the eyes beneath, at their nearest point of convergence about equal to two-thirds 

 the length of the scape; first joint of flagellum somewhat shorter than the sec- 

 ond ; dorsulum a little more finely punctured than the front and vertex ; enclo- 

 sure of middle segment divided by a very wide, longitudinal channel, which is 

 .wider by far than the ti-ansverse row of fovese at the base, the two convexities 

 obliquely striated, posterior face rugose apically, the lateral ridges strong and with 

 a finely foveolated furrow on each side ; abdomen fully as long as the head and 

 thorax united ; pygidium triangular, flat, not depressed. Black ; clypeus, scape 

 entii-ely, pedicellum beneath, pronotum above, tubercles, spot on scutellum, tips 

 of all the femora, especially the anterior pair, all the tibige except an elongate, 

 black spot within and the tarsi, except one or two apical joints, yellow ; flagellum 

 beneath testaceous; clypeus, inner orbits beneath, cheeks, and thorax on sides 

 and beneath with dense silvery pubescence ; abdomen and legs with a silvery 

 sericeous pile ; wings hyaline, iridescent. Length 5 mm. 



Colorado (Gillette) ; Montana. It is a much more slender species 

 than pinguis, and is farther distinguished from that species by the 

 yellow clypeus, greater ahumhxnce of silvery pubescence, etc. 



67. Crabro pin$>;uiN n. sp. 



9 — Anterior margin of clypeus truncate in the middle, not or indistinctly 

 dentate laterally ; head large, rather longer than usual, strongly punctured on 

 the front, more finely so posteriorly; a broad, though not deep, furrow runs from 

 each hind ocellus to the inner orliits ; fore ocellus in a strong dejiression, the im- 

 pressed line, which extends from it to the frontal dejiression, well marked : space 

 between the eyes beneath, at their nearest point of convergence about equal to a 

 little more than half the length of the scape ; first joint of flagellum about one- 

 third longer than the second ; pi-onotum at the sides with a blunt tooth ; dorsulum 

 more distinctly punctured than the occiput, but less coarsely so than the front 

 and vertex ; episternal suture of the mesopleurae slightly sinuous, nearly straight ; 

 middle segment with the enclosure well marked, within it is obliquely striated and 

 at the base with a depression, which is angular behind in the middle and longi- 

 tudinally ridged; posterior face rugose apically; medial and hind tibiae tolerably 

 spinose; abdomen shorter than head and thorax united, pygidium triangular, 

 rather acute at apex, not depressed. Black, including the scutellum ; mandibles 

 except apex, scape in front, prtniotum above, tubercles, tips of fore femora, fore 

 and medial tibise in front, hind tibise at base, two ba.sal joints of fore and medial 

 tarsi (the remaining joints brownish), and basal joint of hind tarsi, yellow; joints 

 2-5 of hind tarsi, blackish ; clypeus, inner orbits below, broadly, with silvery pu- 

 bescence; this pubescence is almost lacking on the cheeks and sides of thorax; 

 abdomen and legs with a silvery sericeous pile. Length 5 mm. 



State of Washington. In the sj)ecimen before nie the mandibles 

 have the ap])earance of being worn away, and are so short that when 

 closed they do not touch, and the .space between them would indicate 

 an ii;n)airment of over one-third. 



