NO. 2173. A REVISION OF THE BEMBICINE WASPS— PARKER. 101 



tergites 1-5, all except first continuous, apex of sixth tergite, lateral 

 spots on sternites 2-5, femora distally, tibiae except stripe below on 

 all pairs, reduced in extent on posterior pair, and tarsi, pale or greenish 

 yellow or soiled white. 



In both sexes the color is the same; the fasciae on the tergites are 

 soiled white, the markings of the head more of a greenish yellow shade 

 and the legs are pale yellow. The flagellum is black above, pale or 

 testaceous below, and on the male segments 7-9 are spinose on the 

 posterior border. The wings are hyahne, the nerviu-es brown. The 

 pubescence is white, relatively long and dense. The middle femora 

 of the males are serrate-dentate below, the second sternite bears a 

 prominent median process scarcely hooked at the posterior end and 

 the sixth bears a smaller, pointed process. 



Length. — 13-17 mm. 



This species is very closely related to spinolae on the one hand and 

 primaaestate on the other. The males of this species differ from those 

 of spinolae in having the fasciae on the tergites white, the apical ter- 

 gite maculated and the greater development of the pubescence ; from 

 those of primaaestate in having the fasciae of the tergites white instead 

 of yellow and in the absence of maculations on the sides of thorax and 

 median segment. In the case of the female it differs from spinolae in 

 having the apical tergite maculated and in the greater development 

 of the pubescence. In some specimens of this species, however, the 

 maculation of the apical tergite is obscured or even lacking. From 

 primaaestate the female of this species is distinguished by the absence 

 of conspicuous maculations on the thorax and median segment. 



Hahitat.—CaMomisi, Oregon, Washington, Vancouver, and New 

 Mexico. 



Number of specimens examined. — Males, 21; females, 18. 



Type.— C'dt. No. 19780, U.S.N.M. 



BEMBIX PRIMAAESTATE Johnson and Rohwer. 



Figs. 166, 167, 168, 197. 



Bembex primaaestate Johnson and Rouwer, Ent. News, vol. 19, 1908, p. 378, 



female. 

 Bembex primaaestate Rohwer, Proc. U. S. Nat. Mus., vol. 41, 1912, p. 466, fig. 3, 



male. 



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

 and fu'st two flagellar segments below, space between antennae, some- 

 times spot below anterior ocellus, broad anterior orbits shortened 

 above, posterior orbits, usually posterior border of pronotum but not 

 always, tubercles, sides of prothorax variable in extent, spot on tegulae, 

 spot each on sides of median segment, metaplem-ae, and mesopleurae, 

 on all three variable in extent or even lacldng, broad fasciae on ter- 



