100 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.52. 



laterally on anterior border, and notched medially on both anterior 

 and posterior borders, more evident on the latter, fifth deeply and 

 acutely notched on posterior middle, central spot on sixth tergite, 

 small lateral spots on sternites 2-5, femora distally, tibiae except 

 spot below on first and second pairs, and tarsi, yellow. 



In both sexes the flagellum is tawny below and the pubescence is 

 well developed, especially on the males. The eyes are widely separa- 

 ted and their inner margins are approximately parallel. The wings 

 are hyaline and the general build is somewhat robust. 



Length. — 16-18 mm. 



This species seems to be intermediate between nubilipennis and 

 spinolae, not so large as the former and a trifle larger and more robust 

 than the latter. From the former the males of this speciss can be 

 readily distinguished by the absence in this species of the secondary 

 lateral processes on the sixth sternite and the presence of an evident 

 spine on the fifth segment of the antennae. From the latter it may 

 be distinguished by the flattened, roundly pointed process of the 

 sixth sternite, the richer color of the maculations, which show less of 

 the greenish tinge, and the presence of the spine on the fifth segment 

 of the antennae, characters not found on spinolae. 



The female is distinguished from nubilipennis by its clear wings and 

 from spinolae, and the light banded species closely related to it by the 

 deeper yellow of the maculations, and from the yellow-maculated 

 similans by the absence of any maculations upon the mesopleurae 

 and metapleurae. 



Habitat. — Mexico, New Mexico, Arizona. 



Number of specimens examined — Males, 11; females, 3. 



BEMBIX COMATA, new species. 



Figs. 163, 164, 165, 196. 



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

 below, spot between antennae, broad anterior orbits, very narrow 

 posterior orbits, broken fine on posterior border of pronotum, posterior 

 edge of tubercle continued in a line downward and spot on side of 

 prothorax, spot on tegulae, short lateral lines on scutum, broad sinuate 

 fasciae on tergite s 1-6, all except the first continuous, apex of seventh 

 tergite, lateral spots on sternites 2-6, femora distally, tibiae except 

 stripe below on first pair, and tarsi, pale or greenish yellow or soiled 

 white. 



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

 below, spot between antennae, broad anterior orbits, narrow posterior 

 orbits, broken line on posterior border of pronotum, tubercles, spot 

 on sides of prothorax, spot on tegulae, short lateral lines on scutum 

 above base of wings, lateral spots on scutellum, small spot on meso- 

 pleurae, spot on sides of median segment, broad sinuate fasciae on 



