425 



tooth (in Oocncyrtus the mandible has an acute ventral tooth and a 

 broadly truncate inner one) ; palpi practically the same, the maxillary 

 pair with four short, nearly equal joints, the labial pair with two sub- 

 equal, short joints. 



Thorax similar, the axillae well separated at their tips as in Ooen- 

 cyrttis: the scutellum a little larger and broader with the apex more 

 rounded. Wings nearly the same, the marginal vein punctiform, the 

 stigmal somewhat shorter than in Oocncyrtus and triangularly enlarged 

 from base to apex with a short spur at apex projecting towards the 

 costal margin ; discal and marginal ciliation similar, the speculum 

 however, greatly widening below. Legs similar, the middle tarsi slenderer 

 and less strongly tapering towards the apex ; the middle tibial spur slen- 

 der and as long as the first tarsal joint. 



Abdomen considerably smaller, after drying no longer than half the 

 thorax and as wide, being much broader than long and well rounded 

 at apex; the dorsum beyond the first tergite caving in after death in a 

 peculiar manner, the venter, however, not compressed but broadly 

 rounded from side to side in the form of nearly a semicircle near 

 the base of abdomen ; vibrissal plates situated on either side of the 

 dorsum about half way between the base and apex and withdrawn within 

 the dorsal concavity, the vibrissae consequently difficult to trace but 

 reaching to the apex. 



In sculpture differing appreciably, the surface of all parts of the 

 head and body much smoother and shinier, for although fine, delicate' 

 reticulations occur on the head and mesoscutum, they do not produce a 

 shagreened appearance as in Oocncyrtus, the scutellum, moreover, en- 

 tirely smooth and polished ; pubescence of the same character as in 

 Oocncyrtus. 



Genotype : Xcsniafia flavi/^cs n. sp. 



Xesmatia flavipes n. sp. Figs. 18, 19. 



Female : Head moderately thin fronto-occipitally, somewhat broader 

 than long, being thickest and widest across the middle of the eyes, the 

 dorsal surface well rounded from side to side ; frontovertex occupying 

 about one-third of the width of the head in dorsal view, about a third 

 longer again than wide and becoming somewhat wider behind the ocelli ; 

 the latter in a right-angled triangle, the posterior pair somewhat less 

 than one-half their own diameter from the eye-margins and about twice 

 as far removed from the occipital margin ; eyes very broadly oval 

 or but little longer than wide, the inferio-posterior margin much less 

 curved than the inner margins ; cheeks somewhat shorter than the width 

 of the eyes and rather strongly curved in towards the mouth as seen 

 from in front ; face nearly as wide as long, the scrobes in the form 

 of a moderately deep, broadly ovate depression covering its larger part, 

 reaching upward between the eyes to the anterior limit of the frons, 

 and divided by a rather wide longitudinal ridge which runs about two- 

 thirds of the length of the depression from the antennal sockets up- 



