104 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 52. 



scutum distinctly pubescent although the hairs here are somewhat 

 shorter than elsewhere on the thorax. 



Habitat. — New Mexico, Arizona, and Florida. 



Number of specimens examined — Males, 7 ; females, 15. 



BEMBIX PRUINOSA Fox. 



Figs. 171, 172, 199. 

 Bembex pruinosa Fox, Proc. Acad. Nat. Sci. Phila., 1895, p. 361, female, male. 



Male. — Black: Labrum, mandibles except apices, clypeus, scape 

 below, space between antennae, anterior orbits, narrow posterior 

 orbits, narrow line on posterior border of pronotum, rarely wanting, 

 spot on tegulae, small lateral spot on scutum above base of wings, 

 sometimes lateral spots on scutellum, fascia on metanotum some- 

 times absent, occasionally one or two small spots on side of median 

 segment, fasciae on tergites 1-6, all of which may be broad and con- 

 tinuous or all may be somewhat narrowed and interrupted medially, 

 in either case the anterior border being more or less sinuate on either 

 side the midline, apex of ultimate tergite, posterior lateral spots on 

 sternites 2-6 usually, though not always, connected by narrow apical 

 lines, femora except broad stripe above and basally below, tibiae 

 except stripe below, and tarsi, white or yellowish white. 



Segment 7 of the flagellum seen from above shows a rather con- 

 spicuous though blunt spine on its posterior border and segments 

 9-11 bear pits or excavations. The second sternite is smooth; the 

 sixth bears a pair of low inconspicuous carinae that diverge basally; 

 the seventh ends in a prominent spine that is broadly grooved ven- 

 trally and bifid apically. The middle femora are smooth. 



Female.— Black: Labrum, mandibles except apices, clypeus except 

 black spot basally, rarely lacking, scape below, space between inser- 

 tions of antennae, anterior orbits, posterior orbits, narrow posterior 

 border of pronotum, small spot on tegulae, small lateral spots on 

 scutum above base of wings, curved fascia, sometimes broken into 

 spots, on scutellum, fascia on metanotum, curved fascia on dorsum 

 of median segment sometimes interrupted medially, lower part of 

 lateral angles of median segment sometimes reduced to narrow pos- 

 terior lateral spots, occasionally small spot on mesopleurae, broad 

 continous fasciae on tergites 1-5, the first narrowed medially, the 

 remainder bisinuate on anterior border, lateral spots on sternites 2-5, 

 which may or may not be connected by apical lines, tibiae except 

 below and spot on posterior border of anterior pair, and tarsi, white or 

 yellowish white. 



Length. — 16-19 mm. 



In both sexes the flagellum is yellowish or tawny below and the 

 apical segment is reddish. The head, thorax, median segment, and 



