NO. 2173. A REVISION OF THE BEMBICINE WASPS— PARKER. 109 



below. The second sternite usually bears a prominent median 

 tubercle, but this may appear as a small median carina or be almost 

 entirely lacking; the sixth bears a prominent median process, flat- 

 tened, broad at base, pointed or slightly truncate at apex and directed 

 obliquely backward. In one specimen this process is decidedly 

 truncate apically and in another smaller one it is almost entirely 

 reduced. There is some variation in the form of the genital stipes, 

 but the figures given show the type. 



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

 pair of black spots basally, spot between insertions of antennae, 

 transverse row of three (or five) spots in front of anterior ocellus, 

 scape below, anterior orbits, posterior orbits, prothorax except 

 anterior median dorsal spot and spot in front of tubercles, tegulae, 

 lateral lines and short pair of discal lines on scutum, lateral spots 

 (sometimes united into a fascia) on soutellum, fascia on metanotum, 

 curved fascia on dorsum of median segment, lateral angles and sides 

 of median segment, metapleurae, mesopleurae almost entirely, 

 fasciae on tergites 1-5, first narrowed and also interrupted medially, 

 remainder continuous, second as in the male inclosing a pair of 

 dorsal spots, third having a similar pair connected with the anterior 

 black border and having on posterior border a deep median notch 

 and lateral sinuations, fourth and fifth each with pair of shallow 

 anterior emarginations and median posterior triangular emargina- 

 tion, apex of ultimate tergite, lateral spots on sternites 2-5, all or 

 part of which may be connected by narrow apical lines, spot on 

 anterior and middle coxae below, femora except stripe above and 

 more or less basally below, tibiae except stripe on anterior pair below, 

 and tarsi, lemon yellow with a tinge of greenish in places. 



Length. — 14-16 mm. 



The five females before me vary somewhat in regard to color. 

 Two have the clypeus and the frons, except the spot between the 

 antennae and those in front of the anterior ocellus, entirely black, 

 and four of the five have a median posterior discal mark on the 

 scutum. In the male there is less variation in color, only one of the 

 entire number being without discal marks on the scutum. 



The wings in both sexes are hyaline and the pubescence and 

 punctation are of the normal character. 



Habitat. — Mexico, Arizona, New Mexico, and Texas. 



Number of specimens examined — Males, 11; females, 5. 



BEMBIX MELANASPIS, new species. 



Figs. 179, 180, 203. 



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

 below, frons below, small spot in front of anterior ocellus and a small 

 round spot on either side of this one, broad anterior orbits narrowed 



