xxxii. '21] 



ENTOMOLOGICAL NFAVS 



309 



Subgcnital plate of female short, flat ; its apex with a broad triangular 

 emargination ; hind lobes very short. Ovipositor moderately curved, 

 about twice as long as pronotum ................ B. repandus ( Walk.) 



2 (1). Fastigium of the vertex with middle lobe subacute, distinctly 

 prominent and scarcely broader than the side lobes. Lower part of 

 the face, clypeus and mandibles black. Hind lobe of pronotum nar- 

 lower and longer; lateral lobes with hind angles subacuminate. I'V 

 male subgenital plate elongate, tectiform, deeply and narrowly tri- 

 angularly emarginate at the apex, with hind lobes rather long and 

 slightly impressed. Ovipositor strongly recurved, one and one-half 

 times as long as pronotum ............ H. diadematus Sauss. & Pict. 



The dimensions of both species are as follows: 



Length of body 



Length of pronotum 



\Yidth of the hind lobe of pronotum.. 



Length of legmen 



Length of hind femur 



Length of hind tibia 



Length of ovipositor 



repandus 

 36 mm. 



10 



57 



17 

 16 



1 ' ' 



diadematus 



30 mm. 



9.5 



6.5 

 49 

 16 

 15 

 15 



R. Jlasileus repandus ( Walk.) D. /.'. diadfialus Sauss. & I'ici. V , !', iasligium 

 of vertex from above. S. Si, subgenital plate of female. L, Li, lateral lobes of pronotum. 



The geographical distribution of both species is, so far, very 

 poorly known. B. diadematus was originally described from 

 Cayenne and the only specimen before me was taken by A. A. 

 Abraham at Takama, on the I'.erbicr ki\er, llrhish Guiana, in 

 February, 1919. 1 do not know of any other records of this 

 species. As for B. repandus, its type is from an unknown 



