P. CAMERON. HYMENOPTERA. 229 



furrow from the face, but the latter rises above it ; its apex transverse with the sides obliquely 

 narrowed. Labrum projecting. Eyes large, projecting, parallel ; the malar space short, but 

 distinct. Legs stout, the hinder longer and stouter than the others ; the apices of the tarsal 

 joints armed with stout spines. Antennae not thickened tovvards the apex. Mandibular teeth 

 of equal size. 



_Of the gênera known to me that hère described comes nearest to Erythromesostenus, 

 Cam. from Australia; that genus lias the scutellum only keeled at the base, it lias no complète 

 transverse keels on the metanotum, the clypeus is separated from the face by a distinct 

 furrow, its apex is rounded, not transverse and the transverse médian nervure in the hind 

 wings is broken in the middle. 



1. Stiroiuesostenus xanthostomus sp. n. 

 Bivak Island, January. 



Ferrugineous, the antennae black, the scape on the underside brownish, joints 6 — 15 

 white, black above, the palpi white, the clypeus, labrum, malar space and mandibles except 

 the teeth pale yellow, the rest of the head black except for a white mark between the eyes 

 and the ocelli, extending from the hinder part of the vertex to the top of the front, its top 

 and bottom obliquely narrowed; the mesopleurae, sternum and, less strongly, the propleurae 

 tinged with yellow; the legs coloured like the body, the terminal joint of the 4 front tarsi 

 and the whole of the posterior, black. Wings hyaline, the apex with a narrow cloud, the 

 stigma and nervures black; the récurrent nervure largely bullated in the middle, united to 

 the short thickened single transverse cubital. Q. 



Length 10 m. m.; terebra 2 mm. 



Face closely strongly punctured, except close to the eyes, where it is finely shagreened 

 and a smooth line above the middle ; the top of the clypeus similarly punctured, the rest 

 smooth, the apex broadly rounded. Mesonotum trilobate, its base depressed. Scutellar dépression 

 large, wide, deep; the bottom with 4 stout keels. Scutellum smooth, margined stoutly to near 

 the apex. Base of metanotum to the keel finely rugosely punctured, the top of the apical 

 slope more strongly rugose ; the rest coarsely obliquely in the centre, more strongly transversely 

 striated on the sides, the teeth distinct, broader than they are long, rounded at the apex; 

 the spiracles oval, twice longer than wide. Tarsi spinose, the apices of the joints with longer 

 and stouter spines. 



Cratocryptus, Cam. 



1. Cratocryptus fasciatipennis sp. n. 



Bivak Island, September. 



Black, the palpi, tegulae, scutellum, a large mark on the metanotum, commencing near 

 the keel, extending to the apex, but leaving a large conical mark in the middle of the apical 

 slope and laterally extending to the pleural keel, which it touches on the lower half, the 

 i st abdominal segment, except for an irregular black line before the post-petiole on the sides, 

 the base and sides below tinged with rufous, more than the apical third of the 2 nd segment 

 and the whole of the penultimate, whitish-yellow. Four front legs dark rufo-testaceous, the 

 Nova Guinea. IX. Zoologie. 30 



