266 p. CAMERON. 



C'rabro ezrsi' sp. nov. 



Black ; the antennal scape below, the greater part of the 4 front trochanters, 

 apex of fore femora, the tarsi, the 4 front tibite and the base of the jiosterior 

 tibiae, yellow. Mandibles yellow, rufous at the apex. Wings hyaline, the nerv- 

 ures black; the recurrent nervure received shortly, but distinctly, before the 

 middle of the cellule; the apical abscissa of radius oblique, rounded below. 9- 

 Length 5 mm. 



Face and clypeus densely covered with silvery pubescence; clyjieus keeled in 

 the centre, its apex rounded. Eyes very large, coarsely facetted ; distinctly con- 

 verging below. Ocelli large; the anterior separated from the posterior by a 

 slightly greater distance than these from each other. Temples large. Occiput 

 transverse. Pro- and mesothorax alutaceous; the median segment shining; its 

 area large; the bounding furrows curved, obscurely striated ; the central furrow 

 is obscurely crenulated. Pleuraj smooth and shining. Tegulse piceous. Petiole 

 broad at the base, becoming gradually wider towards the apex. 



Hah. — Mexico. 



In size aud coloration this species con)es close to C. montezunia, 

 but may readily be separated from it by the ocelli not being in a 

 triangle but in a curve, and the metanotal area not longitudinally 

 striated. 



Entoinognathiis mexicaniis sp. nov. 



Black, smooth, shining, covered with silvery pubescence ; the outer edge of the 

 pronotum, the 4 front tibise, except behind, and the tarsi, except at the apex, yel- 

 low ; wings hyaline, the nervures black. Face and clypeus densely covered with 

 silvery pubescence. Metanotal area roundly raised, clearly separated, strongly 

 aciculated, with 4, not very distinct, longitudinal keels; the keels bounding it 

 are continued down the centre, forming an area, which is narrowed gradually 

 towards the apex ; the rest is coarsely aciculated and is bordered laterally. The 

 oblique furrow near the base of the mesopleurse is wide, deep and bears stout 

 keels. Radial cellule short, not quite reaching to the middle; the apical abscissa 

 slightly oblique, more than half the length of the transverse cubital. Abdomen 

 smooth, shining; the apices of the 3rd aud 4th segments roundly incised; the 

 penultimate segment closely, coarsely punctured; the last rufous; the dorsum 

 with the sides stoutly raised all around, the apex rounded ; the edges of the seg- 

 ments piceous. Clypeus roundly convex ; its apex not quite transverse, the outer 

 edges slightly dilated ; beyond it are two indistinct, rounded teeth or tubercles. 

 Hinder ocelli separated from each other by a slightly greater distance than they 

 are from the eyes and by a distinctly greater distance than they are from the 

 anterior. The pubescence on the eyes is white. Length 3 mm. 



Hab. — Mexico. 



Entomognathus appears to be rare in the nearctic and neotropical 

 regions. 



PLESIOMASARIS gen. nov. 



% . — Fore wings with 3 cubital cellules, the 2nd and 3rd receiv- 

 ing each a recurrent nervure, the radial cellule appendiculate. 

 Head large, transverse behind; temples distinct ; malar space obso- 



