Fossorial ffymenoptera from the Khasia Hills. 57 



A distinct species. The characteristic features are the 

 red coxse and trochanters^ the smooth head and thorax, the 

 longish slender antennic^ and the three distinct longish keels 

 on the front. 



Cerceris fortinata, sp. n. 



Xigra, facie clypeoqiie flavis ; lineis duabus pronoti, tegitlis, post- 

 scutello abdominisque segmento 3" late rufis ; alis hj-alinis, anticis 

 fumatis. $ . 



Long. 12 mm. 



Antennae black, the scape brownish beneath, the former 

 minutely punctured and covered with long white hair. Head 

 black, the face, the inner orbits broadly on the inner side, 

 the clypeus and oral region, except at the apex, lemon-yellow ; 

 front and vertex closely and strongly punctured and sparsely 

 covered with longish white hair ; the yellow-coloured part 

 more sparsely punctured and (especially laterally) thickly 

 covered with silvery pubescence ; the apex of the clypeus 

 slightly roundly projecting in the middle and depressed. 

 Mandibles black, with a yellow mark at the base. Pro- 

 notum and mesothorax strongly and closely punctured ; 

 the propleurse stoutly striated, the metapleurse at the base 

 above obliquely striated, below aciculated; the apex rngosely 

 punctured. On either side of the pronotum, behind, is a 

 broad band ; the tegulse and the postscutellum are rufous. 

 The basal area on the median segment is triangular, is 

 closely longitudinally striated, and has the basal half furrowed 

 in the middle, the furrow being continued to the apex as an 

 elongated area. Legs black, the knees and anterior tibise 

 and tarsi in front rufo-testaccous, as are also the fore claws ; 

 the spurs are pale. AVings hyaline ; the fore wings broadly 

 smoky in front, especially towards the apev, on the radial 

 and cubital cellules. Abdomen black, the third segment, 

 except for a broad curved mark at base, rufous ; the fifth 

 segment is rufous at the apex. Pygidium irregularly 

 wrinkled; the apex smoother and dull rufous; the hypo- 

 pygium is deeply incised in the middle at the apex, the sides 

 forming stout teeth. 



Comes into Bingham's Section C a c~, near C. unifasciata. 



Cerceris erijthropoda, sp. n. 



Head and thorax rufous, largely marked wath black ; the 

 area on median segment black ; the petiole, the base of the 

 second segment and the apex of the third rufous ; the legs 



