28 1^1 r. 1^. Cameron on neir Aculeate llytnenopteru 



silvery pubescence. Thorax alutaceous; tlie apox of the 

 proiiotum thickly covered with silvery pubescence; the nieso- 

 notuni with a pale down. Scutellum minutely punctured. 

 ^Median sef!;ment alutaceous, the sides transversely striateil ; 

 the apex is closely transversely striated, the sides thickly 

 covered with silvery ])ubesceiice ; the furrow is longer than 

 usual. Pro- and mcsopleura? alutaceous; the metapleuife 

 closely, finely, obliquely striated, tiie apex thickly covere 1 

 with silvery pubescence. The metasternal keel is hollowed 

 throughout; the central keel is ill-defined. Legs pruinose ; 

 the sj)ines are black. Wings short, hyaline, the basal half 

 yellowish ; the first cubital cellule at the top is two-thirds of 

 the length of the second; the first transverse cubital nervure 

 is oblique at the top, the middle curve rounded ; the second 

 recurrent nervure is received distinctly behind the middle 

 and is somewhat sharply elbowed. The abdomen is as long 

 as the head and thorax united ; the pygidium smooth, 

 shining; the lateral keels distinct. 



C^NOLARRA, gen. nov. 



Second cubital cellule shortly stalked. Radial cellule 

 short, wide, the apical abscissa of the radius large, oblique. 

 Inner eye-orbits with distinct folds. Eyes reacliing to the 

 base of the mandibles. Tiie hinder ocelli obliteratcl. iMan- 

 dibles incised on the lower side. The hinder edge of the 

 pronotum not placed below the hinder edge of the meso- 

 notum. Median segment as long as the mesothorax ; its 

 apex with an oblique slope. Tibiae and tarsi sparsely spined ; 

 the tarsi long ; the claws short, simple ; the front tarsi not 

 with long spines as in Tachysphex, &c. 



The eyes converge a little above; the second joint of tiie 

 antennee is pilose ; the top of the jironotum has oblique sides; 

 the pygidium is ])ilose; the hinder tibiaj grooved; the 

 pteiostigma is small. The structure of the prosternum is 

 rather peculiar ; it is large, keeled down the middle; the sides 

 project at the ajiex, the middle of the projection is depressed^ 

 so that there is thus formed two blunt rounded teeth. 



This genus comes nearest to Noiogonia, with which it agrees 

 in the structure of the thorax, head, and abdomen ; but may 

 be readily separated from it by the transverse cubital nervures 

 being united at the top and there shortly appendiculated. 

 The only genus of Larridce with an appendiculated cubital 

 cellule with which it could be confounded is Palarus, but 

 that is readily separated by the ocelli being complete. 



The radial cellule is wide and hardly reaches to the apex of 



