HTMENOPTEEA IN THE BRITISH MUSEUM. 431 



in the late Mr. Smitli's own handwriting, I have no doubt in my 

 mind that P. unifasciatus and P. exortivus are one and the same 

 species. The type specimen of the latter is somewhat larger and 

 has the median segment more yellow and the legs with more black, 

 but otherwise they are identical in sculpture and markings. 



POMPILUS BIOCtTLATUS, Sp. nOV. 



$ . Head, thorax, and abdomen smooth, pruinose ; clypeus 

 subconvex, its anterior margin arched, its posterior nearly trans- 

 verse; scutellum large, laterally compressed; the median segment 

 short, with a rounded truncation posteriorly ; legs with the tibiae 

 and tarsi spinose, the spines short and stout, not disposed in rows, 

 claws unidentate ; abdomen sessile. Black ; the head, except an 

 irregular black mark on the front reaching the base of the an- 

 tennae, abroad stripe on the posterior margin of the pronotura, a 

 square spot at the apex of the mesonotum, the scutellum in the 

 middle, the legs except the coxae, trochanters, base of the femora 

 and the apical joints of the tarsi, and two lateral linear spots at 

 the base of the 2nd segment of the abdomen, ferruginous yellow ; 

 wings ferruginous, with their apical margins broadly fuscous. 

 The spots on the abdomen are sometimes obsolete, but can nearly 

 always be detected by holding the insect up to a good light. 



<S . Very similar, has more black mixed with the ferruginous 

 yellow on the head and thorax, and is smaller and slighter. 



$ . Length 12-17 millim. ; exp. 30-35 millim. 



c?. Length 10-11 millim.; exp. 25-32 millim. 

 Sah. Sikkim ; Burma ; Tenasserim ; extending to China and 

 Japan. 



In Mr. E-othney's colleetion,worked out by Mr. Cameron, there 

 is one specimen of this species labelled Fompilus unifasciatus, 

 Smith, in thie late Mr. Smith's own handwriting, and is entered 

 under that name by Mr. Cameron in his paper (Hym. Orient., 

 Mem. Manch. Lit. & Phil. Soc. 1891, p. 470), but with a note to 

 the effect that it differs from the type of P. unifasciatus. I have 

 a series of over a hundred of both species, and. the difference 

 between them is constant and well-marked. 



PoMPiLus Alicia, sp. nov. (PL XIX. figs. 5, 5«.) 



§ . Head, thorax, and abdomen smooth, very slightly pruinose ; 



clypeus broader than high, convex, slightly projecting anteriorly, 



somewhat emarginate in the middle ; prothorax squarish in front; 



posterior margin of the prouotum arched; median segment rounded, 



