MONOGRAPH OF THE WASPS OF BRITISH INDIA. 511 



The female is very near C. euryanthe Kohl., in the shajDe of the clypeus 

 and pygidial area, but seems to differ in the much finer sculpture and the 

 proportions of the antennal joints. 



Cerceris vigilans Sm. 



Cerceris vigilans Sm. Oat. Hym. B, M. IV, p. 454, 1866, S. 



Cerceris lanata 0am. Jour. Bom. Nat. Hist. Soc. XVII, p. 1009, 1907. 



5 . Nigra ; margine interiore oculorum anguste, macula post oculos, 

 vertice macula parva utrinqtie, segmento prime dorsali macula utrinque, 

 tibiisque linea, albis ; segmentis abdominalibus 2 — 5 rufo-ferrugineis ; alis 

 fusco-violescentibus ; clypeo apice anguste producto, recurvato ; meso- 

 pleuris tuberculatis ; segmento mediano area basali delicatissime punctata; 

 segmento ventrali secundo area basali elevata nulla. 



S . Feminae similis ; pronoto utrinque albomaculato ; segmentis 

 dorsalibus 5 — 6 infuscatis ; clypeo apice late rotundato, dentibus tribus 

 armato ; flagello subtus ferrugineo, fronte albo trilineato. 



Long, 5 , 12-15 mm. ; S , 9-12 mm. 



5 . Olypeus a little longer than broad, the apical mai'gin produced in 

 the middle and recurved, the middle produced into a broad rounded tooth 

 with a minute tubercle on each side of it at the base. Antennae inserted 

 more than twice as far from the anterior ocellus as from the base of the 

 clypeus, the second and third joints of the flagelum equal in length. Inner 

 margins of the eyes almost parallel ; posterior ocelli half as far again from 

 the eyes as from each other. Mesopleurse with a small, blunt tubercle ; 

 second ventral segment without a raised area at the base ; first segment 

 nearly twice as broad as long ; pygidial area elongate ovate, broader at the 

 base than at the apex, twice as long as the greatest breadth. Closely and 

 rather finely punctured, the enclosed space at the base of the median seg- 

 ment very minutely punctured, clypeus sparsely and shallowly punctured. 



S . Clypeus very broadly rounded at the apex and armed with three 

 broad teeth ; apical joint of the flagellum longer than the penultimate and 

 strongly curved ; pygidial area more than twice as long as broad, a little 

 broader at the apex than at the base. 



Habitat — Almost the whole of the Indian region, excepting Ceylon and 

 the North- West frontier districts. Bingham's description of the female 

 seems to have been taken from a male. 



Cerceris leucozonica Schlett. 

 Cerceris leucozonica Schlett. Zool. Jahrb. II, p. 406, 1887, 5 6 ■ 

 $ . Nigra, clypeo, fronte, scapo, pronoto macula utrinque, tegulis, 

 postscutello, segmentis abdominalibus primo, tertio, quarto, quintoque 

 f asciis latis flavis ; flagello fusco-ferrugineo, pedibus flavis, ferrugineo- 

 variegatis ; clypeo piano, ad apicem modice angustato, margine apicali 

 27 



