Mr. E. E. Turner on Fossorial Hymenoptera. 441 



of the scape ; from the latter in the same points in colour, 

 in the much less broadly rounded seventh dorsal segment, 

 and in the much more developed black lobes of the basal 

 joint of the fore tarsi. 



Bembew sever a, Sm. 



Bembcx sever a, Sm. Ann. & Mag. Nat. Hist. (4) xii. p. 297 (1873). $ 

 (uec d). 



Hab. Swan River, W.A. (Du Boulay). 



1 think the female must be taken to be the type of this 

 species. The male described by Smith appears to befunebris 

 with more developed abdominal fasciae, but I do not think 

 that the female belongs to the same species, but to another 

 male from the same collection, placed by Smith in the series. 

 This is a more robust insect, with the serration of the inter- 

 mediate femora not reaching the apex, in this point resem- 

 bling atrifrons, from which it differs in the very slight 

 development of the black lobes of the fore tarsus, in the 

 more robust form, and in the more broadly rounded seventh 

 dorsal segment, in both sexes the labrum and clypeus are 

 black. The thorax of the male is almost entirely black, but 

 there is a yellow spot on the tegula. The antennae are as in 

 atrifrons, but the hollowing of the apical joints is more 

 distinct. There are seven spines on the basal joint of the 

 fore tarsus in both sexes. 



Bembex atrifrons, Sm. 



Bembex atrifrons, Sm. Cat. Hym. B.M. iv. p. 327 (1856). £. 

 Bembex Jlaoilabris, Sm. Aim. & Mag. Nat. Hist. (4) xii. p. 299 (1873). 



Bembex atrifrons, Turn. Proc. Zool. Soc. London, p. 353 (1910). $ 2 • 



Hab. South Perth (Giles) ; Yallingup and Busselton, 

 W.A. (Turner). 



The male has the serration of the intermediate femora not 

 extending either to the base or apex, the intermediate tibiae 

 flattened broadly at the apex, the basal joint of the inter- 

 mediate tarsus broadly emarginate at the base beneath, the 

 basal joint of the anterior tarsus with seven spines on the 

 outer margin and a row of black lobes, a faint longitudinal 

 carina on the third ventral segment, as well as the usual 

 tubercle on the second, the labrum black, the mandibles 

 yellow at the base, and the scape entirely black. The female 

 has the scape more or less yellow beneath and the labrum 

 almost entirely yellow. 



Allied to trepida, Handl. 



