g2 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



I have at hand two males identified by Mercet and bearing the 

 label, "Los Molinos [Spain], G. Mercet." This species is widely 

 distributed throughout the Mediterranean region. 



BEMBIX TENUIFASCIATA, new species 



1 



Figures 204-206 



Type (male). — Black: labrum; mandibles, except tips; clypeus, 

 except pair of large basal spots; scape below; spot between antennae; 

 very short, broad anterior orbits ; posterior orbits, very broad below, 

 narrowed to a point and not reaching vertex above ; posterior border 

 of pronotum; side of prothorax and posterior half of tubercle; 

 curved fascia on posterior part of scutellum continued forward 

 laterally on scutum at base of wings, and narrowed and interrupted 

 on midline; narrow interrupted fascia on metanotum; curved fascia 

 on propodeum, broadest on posterior surface; lateral angle and 

 almost the whole side of the propodeum; large spot on metapleura; 

 large triangular spot on mesopleura; narrow interrupted fasciae on 

 tergites 1-6, the first more widely interrupted than the others, all 

 of which are bisinuate dorsally on the anterior margin, and second, 

 third, and fourth are slightly sinuate laterally on posterior margin; 

 continuous fasciae on posterior border of sternites 2-Jt; minute 

 lateral spots on sternite 6 ; legs, except black lines on all femora and 

 tibiae, and the black terminal segment on all tarsi ; yellow. 



The flagellum is black. The tenth, eleventh, and twelfth seg- 

 ments are excavated below but none are spinose. The middle femora 

 are plain. The apical segment of each tarsus is black and the other 

 segments of the tarsi show a greater or less degree of dark color 

 below. The second sternite is plain and the sixth shows a moderate 

 transverse swelling or elevation not sufficiently prominent to be 

 called a process or tubercle. The seventh tergite at its base bears 

 lateral spines similar to those borne by hidenfafa. 



The allotype (female) in color and the character of the macula- 

 tions is almost exactly like the type. It differs in that the pair of 

 small lateral spots on the scutum at the base of the wings are more 

 prominent; the fasciae on tergites 2 and 4 are continuous and the 

 one on the fifth tergite is more widely interrupted than the one on 

 the first; and the tarsi do not show the black markings seen on the 

 type. 



The wings in this species are slightly and uniformly infumated. 

 The pubescence is short and relatively sparse. The anterior meta- 

 tarsus is provided with seven spines. The disk of the second 

 sternite of the female is smooth and shining and bears numerous 

 coarse punctures, and the sixth is carinate on midline. 



