92 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 52. 



On both sexes the pubescence on the head, thorax, median seg- 

 ments and base of abdomen is white and moderately long and dense, 

 but not so well developed as in the case of amoena. The wings are 

 hyaline, veins brown. The scape is relatively short and heavy; the 

 flagellum is reddish below, especially in the female. The punctures 

 of the scutum are moderately large, evenly but not closely distrib- 

 uted. Those of the median segment smaller and more closely placed. 

 The punctures of the ultimate tergite are coarser, variable in size, 

 and more irregularly placed. A small female from Texas apparently 

 belongs in this species, though it lacks the discal marks on the scutum, 

 the yellow fascia on the median segment and the dorsal fasciae are 

 narrow and none inclose paired black spots. 



Habitat — Florida, Texas, New Mexico, Colorado, Kansas, South 

 Dakota, and Wyoming. 



Number of specimens examined — Males, 29; females, 15. 



BEMBIX BELFRAGEI Cresson. 



Figs. 152, 153, 191, 212, 213. 



Bembex belfragei Cresson, Trans. Amer. Ent. Soc, vol. 4, 1873, p. 220, male. 

 Bembex cressonis Handlirsch, Sitz. Akad. Wissensch. Wien, Math.-Nat. CI., 



vol. 102, 1893, p. 792, male, female, pi. 5, fig. 6. 

 Bembex insignis Handlirsch, Sitz. Akad. Wissensch. Wien, Math.-Nat. CI., 



vol. 102, 1893, p. 793, male, female, pi. 2, fig. 7; pi. 6, fig. 32. 

 Bembex belfragei Fox, Proc. Acad. Nat. Sci., Phila., 1895, p. 357. 



Male. — Black: Labrum wholly or with small basal spots or not at 

 all, clypeus, wholly or with pair of apical spots or not at all, mandibles 

 except apices, scape below or not at all, anterior orbits and spot 

 between antennae which marks may all be lacking, posterior orbits, 

 spot on sides of prothorax continued on tubercles or wholly wanting, 

 rarely spot on mesopleurae and small lateral spots on scutellum, 

 fasciae on tergites 1-4 or 1-6 all interrupted medially, first broad and 

 more widely interrupted than the remainder, second and third broad 

 laterally and abruptly narrowed dorsally on either side the midline, 

 remainder narrower and somewhat undulate, lateral spots on ster- 

 nites 2-3 or 2-5, femora below more or less, tibiae except much of 

 lower surface, and tarsi, yellow or greenish yellow. 



Segments 7-9 of the flagellum are slightly produced on their pos- 

 terior margin and 9-11 bear prominent pits. The apical segment is 

 slightly curved and is longer but narrower than the segment preceding 

 it. The middle femora are dentate below on the distal half. The 

 second sternite bears a large medial, laterally compressed, slightly 

 hooked process. The sixth bears a heavy prominent transverse ridge 

 usually drawn to a sharp edge on its posterior distal border, bluntly 

 pointed medially and slightly curved on either side. The seventh 

 bears a small median posterior process from which a pair of incon- 

 spicuous carinae diverge basally. The apical surface of the ultimate 

 tergite is more or less rugose. 



