BEMBEX. 285 



Key to the Species. 



A. Disc of the mesonotum with a U-shaped 



mark. 



a. CoUnirs ferrugiuous and jelLiw B. Iwiata, p. 285. 



h. Colours black and lactcous yellow £. nielancJwlica, p. 286. 



c. Colours black and bright yellow. 

 a'. 5 c? length over 17 mm. 



fl2. VVings fuscescent B. huddlia, p. 287. 



b^. Wings flavo-hyaline B. sulphuresceiis, p. 287. 



V . 2 S length under 17 mm. 



d\ Apical segment § S marked with 



yellow B. trepanda, p. 288. 



b^. Apical segment $ J entirely black. 



a^. Apical segment laterally sinuate. . B. orientalis, p. 289. 

 b^. Apical segment laterally not sinu- 

 ate, straight B. borrei, p. 289. 



B. Disc of mesonotum without any jj-shaped 



mark. 



a. Joints of anterior tarsi broadly dilated . . B. latitarsus, p. 289. 



b. Joints of anterior tarsi not dilated. 



a' . Colours black and lacteous yellow. 

 a?. Lacteous yellow bands on the abdo- 

 men very broad B. pinguis^ p. 290. 



b^. Lacteous yellow bands on the abdo- 

 men narrow B.fossoria, p. 290. 



v. Colours black and more or less bright 

 yellow, not lacteous. 

 a^. Abdomen sulphur-yeUow with black 



markings B. indica, p. 291. 



b^. Abdomen black with bright yellow 

 markings. 

 a'. Band on 1st segment interrupted 



in the middle B. hesione, p. 291. 



b^. Bands on the three or more basal 

 segments interrupted in the 

 middle. Males only known. 

 a*. Intermediate femora dentate be- 

 neath B. taschenbergii, p. 292. 



6*. Intermediate femora not dentate 



beneath B. ovans, p. 292. 



c^. The basal two segments without 



bauds, with only lateral spots . . B. tcestonii, p. 293. 



515. Bembex lunata. (PI. II, fig. 4.) 



Fabr. Ent. Si/st. ii, p. 249 : Smith, Cat. iv, p. 328 ; Cam. Mem. 

 Manch. L. Ph. Soc. (4) iii, 1890, p. 247 ; Handl. Sitzungsb. 

 A/cad. Wiss. Wien, cii, 1893, p. 777. 



2 . Clypeus smooth and impunctate, convex, widely eraarginate 

 anteriorly ; front, vertex of the head, thorax, and abdomen closely 

 and finely punctured, thinly pubescent, the pubescence longish on 

 the front, occiput, and sides of the median segment; inner orbits 

 parallel ; vertex slightly concavely depressed. Ferruginous, the 

 labrum, mandibles except at base, clypeus, scape and basal joint 

 of the flagellum of the antennae, the inner orbits narrowly up to 



