260 Mr. Cameron on 



as a synonym. Gerstacker's species was from West Africa 

 Dahlbom's from Java. 



Cerceris dentata, sp. iiov. (PL X., f. 10, a, b.) 



Black ; the clypeus, cheeks, antenna 1 ridge, mandibles 

 except at the apex, a spot behind the eyes, an interrupted 

 line on the pronotum, two marks on the scutellum, two 

 marks on the mesopleurse, metanotum, two elongated marks 

 on the median segment, two small marks on the petiole, a 

 line on the apex of the second and third abdominal segments, 

 the fifth, except at the base, the femora beneath and the 

 tibiae and tarsi, clear yellow ; the petiole, coxse, and femora, 

 ferruginous ; wings hyaline ; very slightly infuscated at the 

 apex. Clypeus depressed, the apex transverse. Eyes a 

 little diverging ; ocelli not forming a triangle, the posterior 

 separated from the eyes by the length of the third antennal 

 joint and from each other by the length of the fourth. 

 Body covered with a white pubescence, silvery on the 

 face ; the punctuation moderately strong. The mesosternum 

 in the middle projects into two stout teeth ; the posterior 

 being the larger. Trigonal area elongated, reaching 

 nearly to the apex of the segment, much longer than 

 broad, smooth, impunctate, a fovea on either side of the 

 furrow. Scutellum almost impunctate. Mesopleurse 

 rugosely punctured, convex, bulging out above ; meta- 

 pleurae finely and closely rugose at the base, the apex with 

 large punctures. Petiole hardly longer than broad. Pygi- 

 dial area narrowed at base and apex, .bulging out gradually 

 in the middle, the apex above black, the rest dull rufous, 

 and punctured ; the hair fringe dense, obscure white. 

 Ventral surface with second and third segments banded 

 with pale yellow ; covered with long white hair ; the in- 

 cision in apical segment reaching near to the middle, 

 rounded at base. Wings shorter than usual ; the second 



