300 SPIIEGID^. 



Head as wide as the thorax or wider, broader than long, 

 subquadi-ate in some species, seen fi'om above ; ocelh in a triangle 

 on the vertex ; eyes ovate, not reniform ; antenna? very slightly 



clavate, inserted about the middle 

 of the face or a little higher ; 

 mandibles stout, simple, unideutate 

 or bidentate ; thorax ovate, pro- 

 notum transverse; median segment 

 roundly truncate, always with a 

 larger or smaller triangular or 

 cordate space at the base enclosed 

 by convergent furrows ; legs stout, 

 and in both sexes strongly spinose, 

 more spinose in tlie $ . than in the 

 -Cercerisvigilans, 5- t- c? ; anterior tarsi ciliated; inter- 

 mediate tibiae with one apical spur ; 

 posterior tibiae with two. Wings long, ample ; fore wing with one 

 radial and three cubital cells, the radial cell oblong, the 1st cubital 

 cell longer than the 2nd and 3rd united, the 2nd triangular, 

 petiolate, receiving the 1st x'ecurrent nervure about the middle, 

 the 3rd cubital cell receives the 2nd recurrent nervure near its 

 base. Abdomen oblong, subpetiolate, the petiole formed by the 

 narrowing of the 1st segment, which is sometimes subglobular ; 

 the apical margins of the basal live ( ? ), or basal six ( cJ ) segments 

 strongly constricted, pygidial area with three planes bordered by 

 carinae, the three planes always more or less rugose. 



The fossorial wasps of this genus are predatory on beetles ; the 

 Indian species I have had an opportunity of observing always 

 store Ghrysomelidce in their nests. C. elizabethce I found carrying 

 Downesia brettiughami to her nest. The nests that I have seen have 

 always been dug in level ground, never on a bank-side, and the 

 tunnels leading to them were from 6 to 12 inches deep. 



Key to the Species. 



A. Enclosed, triangular, or cordate space at 

 base of median segment smooth. 

 a. Abdomen with the basal segment red. 

 a'. Clypeus transverse anteriorly. 



a^. Clypeus transverse only in the middle 



at apex ; not dentate C. albopicta, p. 301. 



S^. Clypeus transverse across the whole 



apical margin ; dentate at the sides . C. rothneyi, p. 302. 

 b' . Olypeua emarginate anteriorly. 



a^. Colours reddish brown with a few 



black markings. L. $ 28-22 mm.. C. orientalts, p. 302. 

 Z>^. Colours reddish brown with black 

 and yellow markings. L. $ 10- 



12 mm C. humbertiana, p. 303, 



c'. Clypeus arched anteriorly. 



d^. Mesosternum laterally dentate ; cly- 

 peus not dentate C. dentata, p. 303. 



