84 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 52. 



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

 a pair of medial spots that may merge into one, scape and flagellum 

 below, frons except a butterfly-shaped spot below anterior ocellus, 

 broad posterior orbits united across vertex, prothorax, broad lateral 

 lines, and U-shaped discal mark on scutum, fascia on scutellum, 

 metanotum, dorsum and posterior surface of median segment except 

 black transverse border adjacent to postscutellum and border of 

 oblique sutures, sides of median segment, metathorax and meso- 

 thorax, mesosternum entire on greater part, broad continuous fasciae 

 on tergites 1-4, each with a medial notch and a pair of dorsal emar- 

 ginations on anterior border, second, third, and fourth with less 

 prominent lateral emarginations, three spots on fifth, apex of sixth, 

 first sternite, second except a rather broad, medial, longitudinal 

 black mark, lateral spots on 3-5, apex of sixth, legs except stripe on 

 posterior surface of fermora, and sometimes on tibiae below, yellow 

 The sixth tergite is somewhat wrinkled and apically there is a pair 

 of short but well marked lateral ridges. 



Length. — 18 mm. 



The scape in the female is short but not so broad as in the male. 

 The ocelli in this and the preceding species are peculiar in that the 

 posterior pair are well developed, though not perfectly round, and 

 are in all probability functional. The anterior ocellus is also de- 

 veloped, appearing in long oval form but to what extent it is func- 

 tional, if any, is yet to be learned. All three ocelli are light or amber 

 in color on the dried insects. At the base the labrum bears a tri- 

 angular flattened median area the apex of which forms a slight 

 prominence on the median line. When viewed from the side a 

 slight transverse depression is evident just distal to this prominence 

 from which to the apex along the midline extends a slight carina. 

 The wings are hyaline, the veins dark brown, and the first transver- 

 so-cubital vein is but slightly curved. The pubescence on the head 

 and thorax is long, tolerably dense and yellowish white; that on 

 the abdomen is quite short. The extent of the color on the thorax is 

 unusually variable. On one specimen, from Arizona, the thorax is 

 entirely yellow except for the narrow longitudinal lines on the scutum. 



Habitat. — Arizona, California, and New Mexico. 



Number of specimens examined — Males, 2 ; females, 4. 



BEMBIX CINEREA Handlirsch. 



Figs. 142, 143, 186. 



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

 102, 1893, p. 837, pi. 2, fig. 34; pi. 3, fig. 29, female, male. 



Male. — Black: Labrum, except the lateral borders, sometimes 

 small spots on mandibles, clypeus except the more or less wide lat- 

 eral borders, small spot between antennae, scape below, abbreviated 



