CHBVSIS. 435 



scutellum, the posterior lateral angles always produced, flattened 

 and usually acute at apex. AVings with few nervures and cells ; in 

 the fore wing the costal, the medial and 1st discoidal cells are 

 complete, the 1st subraedial and radial cells sometimes complete, 

 sometimes incomplete, the 2nd submedial and the 1st cubital in- 

 ' complete, the costal cell is always very narrow, almost obliterated, 

 and the 1st cubital generally entirely open at the apex, rarely the 

 transverse cubital nervure closing it is faintly outlined ; in the 

 hind wing the neuration is still more incomplete, mere vestiges of 

 cells and nervures being faintly outlined. Legs feeble, unarmed ; 

 femora and tibiae normal ; claws simple, not dentate. Abdomen 

 pseudosessile, more or less convex above, very variable in proportion 

 of length to breadth ; the sides may be parallel or convergent 

 posteriorly; the base concave, transverse, or with one or more 

 impressions above ; 2nd segment generally the longest, very often 

 medially longitudinally carinate ; 3rd segment often transversely 

 incrassate in the middle, with an anteapical row of foveae present 

 as a rule, exceptionally absent or obliterated ; apical margin with 

 or without teeth, the latter, when present, vary in number in 

 Indian species from 2 to 6. 



The species of this genus are parasitic on fossorial and other 

 Hymenoptera. One species, 0. shanghaiensis, Smith, has been 

 reared from the cocoons of a moth (Monema flavescens, Walk.) ; 

 but it occurs to me that this is probably a case of double parasitism, 

 the Chrysis being parasitic on an Ichneumon, itself a parasite 

 of the moth. 



Key to the Species. 



A. Apical margin of abdomen without teeth. 

 a. Abdomen without any cupreous or golden 



effulgence. 

 a'. Head broader than front margin of pro- 



notum. 

 a 2 . Apical margin of abdomen with a very [p. 440. 



narrow white chitinous border C. hedychroides, 



b 2 . Apical margin of abdomen without any 



such border. 



a 3 . Facial cavity shallow, not margined 

 above; front without a transverse 

 carina. 



a\ Apical margin of abdomen nar- 

 rowly arched, continuous with 



sides C'.m7a,p.441. 



b 4 . Apical margin of abdomen not 



arched, forming rounded but dis- L p- **! 



tinct angles with sides C. kashmiriensi*, 



b 3 . Facial cavity deep, margined above ; 



front, with a transverse carina ; ... C. bunnanu-(t, \> 44J. 

 b'. Head not broader than front margin of 



prouotum. 



tf. Apical margin of abdomen not sinuate. C. wroiigktoni, p. 443. 

 b-. Apical margin of abdomen trisinuate. . C. yucenta, p. 444. 



