90 PROCEEDINGS OF THE NATIONAL MUSEUM vol.75 



emarginations on tergites one and two are reduced to paired black 

 spots. In <;eneral the variations in the maculations are variations in 

 extent rather than variations in pattern. 



Lenirth 14 mm. The specimens are all from Deesa, India. 



BEMBIX TENEBROSA, new species 



Tyfe (male). — Black: clypeus; frons, except a pair of black spots 

 above insertion of antennae and a third black spot above anterior 

 ocellus; antennae; prothorax; tegula; lateral spots on scutum above 

 tegulae; apex of tergites 5, 6, and 7; sixth sternite; femora except 

 basal ends; tibiae; and tarsi, except apical seo-ment; dark ferruginous. 

 The fiagellum is much lighter in color than is the scape. The base of 

 the mandible and the labrum is soiled greenish yellow. The terminal 

 segment of the anterior tarsus and the apex of the terminal segment 

 of middle and posterior tarsi are black. 



On the under side of the anterior tibia near the apical end is a 

 rather large shallow depression on the proximal border of which is a 

 prominent black spot and at the distal border of which there is a 

 second black spot within which there is a conspicuous pit. On the 

 under side of the anterior femur near the proximal end is a short but 

 evident carina. The anterior metatarsus is provided with eight 

 spines. The posterior border of the middle femur is compressed and 

 wedgelike, especially near the base, but it is neither serrate nor 

 dentate. The middle tibia is curved and the middle metatarsus on 

 its inner side near the proximal end bears a small but evident pro- 

 tuberance. Segments 7, 8, and 9 of the flagellum are spinose, and 

 10, 11, and 12 are deeply excavated. The second sternite bears a well- 

 developed, sharp-pointed, median process and the sixth a prominent, 

 triangular, bluntly pointed process that extends slightly beyond the 

 apical border of the sternite. The seventh sternite bears a pair of 

 prominent, slightly divergent carinae that do not extend to the apical 

 border of the sternite, which is broadly truncate at the apex. The 

 seventh tergite is narrowed and roundly pointed at the apex. The 

 eight sternite ends in a long, slender spine that is curved downward 

 near the middle at almost right angles to the axis of the segment. 



The allotype (female) is quite similar to the type in the character 

 of its maculations. The ferruginous color, however, is somewhat 

 lighter in shade and the black on the clypeus, the black spots on the 

 frons above the antennae, and the black on the apical segments of 

 the tarsi are all lacking. A pair of obscure ferruginous lateral 

 spots is found on each of the tergites 4 and 5 and the apex of 6 is 

 also ferruginous. The sixth sternite is carinate medially and the 

 disk of sternite 2 is smooth and shining and bears only a few .scat- 

 tered, coarses punctures. The anterior metatarsus bears only seven 

 spines. 



