Mr. K,. E. Turner on Fossorial Hymenoptera. 437 



? . Clypeus broadly rounded at the apex ; the hxbruni 

 very shallowly emarginate at the apex and divided by a deep 

 longitudinal sulcus. Second joint of the flageilum long, 

 about half as long again as the third ; eyes reaching the base 

 of the mandibles, distinctly divergent towards the clypeus, 

 separated on the vertex by a distance about equal to the 

 length of the third joint of the flagellum. Pronotum widely 

 arched posteriorly, not angulate in the middle; the anterior 

 angles very broadly rounded. Scutellum with a fiat dorsal 

 surface, narrowly rounded at the apex ; median segment 

 gradually sloped posteriorly, without a median sulcus. Sixth 

 dorsal segment broadly rounded at the apex and tl\inly 

 clothed with long black hairs. Third abscissa of the radius 

 shorter than the second, a little shorter than the second 

 transverse cubital nervure; second recurrent nervure received 

 beyond the middle of the third cubital cell ; basal nervure 

 of tlie fore wing interstitial ; cubitus of the hind wing origin- 

 ating just before the tiansverse median nervure. Fore tarsi 

 with a long comb, three spines on the basal joint. Ungues 

 of the fore tarsi bifid, of the others unidentate. 



^ . Clypeus very broadly rounded at the apex, subcarinate 

 longitudinally in the middle ; from the base a low carina 

 branches towards the anterior angles, but does not extend 

 to them. Labrum rounded at the apex, without a sulcus. A 

 very high sharp carina between the antennae extending to 

 the base of the clypeus. Front marked with an arched low 

 carina on each side below the anterior ocellus, the area below 

 the carinfe slightly concave. The joints of the flagellum 

 from the fifth to the ninth are strongly arcuate beneath, the 

 second joint is equal to the third. Pronotum arcuate on the 

 posterior margin, rather strongly narrowed in front. Seventh 

 ventral segment with a longitudinal carina. Third abscissa 

 of the radius shorter tiian in the female, being scarcely more 

 than half as long as the second transverse cubital nervure. 

 All the tarsal ungues bifid. 



Hah. Mlanje, Nyasaland, October to March [S. A. Neave) ; 

 Usagara District, German East Africa, 2500 ft., December 

 {S. A. Neave). 



The female of this species closely resembles the tropical 

 ioYiw oi B. fuUgiiiosus, Klug, and, like that species, varies 

 much in the colour of the antennae and front ; it may, how- 

 ever, at once be distinguished by the great difference in the 

 point of origin of the cubitus of the hind wing, which in 

 fuliginosus is separated from the transverse median nervure 

 by a distance exceeding half the length of the third joint of 

 the flagellum, whereas in separubilis the distance does not 



