Manchester Memoirs, Vol. xliii. (1899), No. 3. 167 



widened from the base to the apex, the apical bounding 

 keel, too, having a distinct curve ; the scutellum is more 

 sharply pyramidal and, looked at from behind, is seen to 

 be distinctly triangular ; the lateral marks on the meso- 

 notum do not reach to the apex. P. khasiana comes 

 near to it also, but is longer, has more marks on the 

 abdomen, has the central basal mark on the median 

 segment, as long as broad, whereas in P. indubia it is 

 distinctly wider than it is long, and the alar nervures 

 from the stigma are distinctly fuscous. 



Antennae longer than the body, black; the extreme 

 apex rufous ; the basal three joints yellow beneath. 

 Head yellow ; the occiput except at the sides, the ocellar 

 region and the front in the middle, black ; the black on 

 the front gradually narrowed to a point at the apex, 

 dilated at the base. The face closely punctured ; the 

 sides bluntly keeled to near the apex, which is only 

 obscurely punctured ; the clypeus smooth ; the tips of the 

 mandibles black. In the middle of the mesonotum is a 

 cup-shaped black mark, the narrow basal part being as 

 long as the dilated apical, which, at the base, is roundly 

 incised ; the lateral marks as long and as wide as the 

 dilated part of the central ; they are narrowed gradually to a 

 point at the apex ; the base on the inner side transverse ; 

 on the outer, obliquely truncated. Scutellum pyramidal, 

 smooth ; looked at from behind it is somewhat triangular, 

 with the sides straight, smooth, impunctate, and covered 

 rather thickly with long, fuscous hair ; the keel on the 

 lower side leaf-like, large. The keel on the sides of the 

 postscutellum narrow. The central area and the base of 

 the median segment distinctly broader than it is long ; the 

 lateral keels straight, slightly, but distinctly, diverging 

 towards the apex; the apical keel slightly and gradually 

 curved ; the basal lateral keel large, not much wider on the 



