398 HYMENOPTEEA. 



black at the tip ; shining, sparsely covered with long soft fuscous hair, the mandibles 

 at the base bearing long pale fulvous hair ; rounded at the sides behind, and there 

 not one-fourth of the length of the eyes. The ocellar region not much raised ; a deep 

 furrow surrounding the anterior ocellus ; the posterior ocelli united by a shallow 

 indistinct furrow. The antennae reaching beyond the apex of the petiole, not tapering 

 much towards the apex ; the flagellum almost bare ; the scape with fuscous hair ; the 

 third and fourth joints subequal. The pro- and mesothorax rather densely covered with 

 long pale hair, shining, almost impunctate ; the propleurse rough in front, smooth 

 behind ; the greater part of the hinder metapleurae impunctate. The lateral furrows on 

 the mesonotum are distinct and reach nearly to the base, but are clearly separated from 

 it. The scutellum is smooth and shining, almost without punctures, hardly narrowed 

 behind, and bearing long fuscous hair. The median segment has at the apex a rather 

 abrupt slope ; shining, impunctate ; the base almost glabrous, the rest sparsely covered 

 with long fuscous hair ; at the base, in the centre, there is an indistinct narrow 

 depression pointed at the apex. The petiole is as long as the second segment, 

 narrowed at the base, gradually dilated towards the apex ; sparsely covered with long 

 soft fuscous hair ; almost impunctate ; in the middle there is a shallow indistinct 

 furrow. The other dorsal segments are smooth and shining, covered, especially at the 

 sides, with long, soft, pale fulvous hair ; at the apex the terminal segment has a broad 

 rounded keel in the middle, the sides being depressed. The basal ventral segment is 

 flat ; a deep furrow down the centre ; the edges are also furrowed on the inner side, 

 the outer edge being sharply keeled. The other ventral segments are, for the greater 

 part, blackish, smooth, sparsely covered with long soft fuscous hair. The legs are 

 sparsely covered with white hair ; the femora are darker and more rufous in tint than 

 the tibiae ; the tarsi are without black. The wings reach nearly to the apex of the 

 abdomen ; clear hyaline, the stigma fuscous, darker at the apex. The radial cellule is 

 shorter than the stigma, the transverse radial issuing from beyond its middle ; it is 

 wide and rounded at the apex and from the radius issues at its bottom a short branch. 

 The second cubital cellule is narrow, triangular, and oblique ; the third is wide and 

 much longer than it— at the apex it is wider than it is at the base. The first recurrent 

 nervure is received in the basal third of the cellule ; the second is received shortly 

 before the middle of the cellule ; the cubitus is obsolete beyond the second transverse 

 cubital nervure ; the transverse basal nervure is interstitial ; the first transverse cubital 

 nervure is straight. 



Allied to B. fulvilabris, but a little stouter and more pilose ; the antennae are darker 

 and more slender ; the area at the base of the median segment is distinctly developed, 

 and the apex of the segment has a much more abrupt slope ; the third cubital cellule 

 is longer compared to the second ; the radius at the second cubital cellule is oblique 

 and quite straight, not curved as in B. fulvilabris. 



