280 Mr. F. Bates' Descriptions of neiv genera, ^c. 



to the front, the apex more or less deeply emarginate, the 

 front angles more or less strongly rounded, the suture 

 very strongly marked ; the labrum is more or less promi- 

 nent, the apex emarginate (sometimes angularly so), the 

 membranous hinge always strongly visible unless the organ 

 be unduly intruded ; the mentum is very remarkable, the 

 sides being rather broadly attenuate, the disc prominent, 

 or convex, and having a large triangular piece scooped 

 out, as it were, from the upper part of its face ; the throat 

 is deeply longitudinally sulcate down the centre, from the 

 base of the mentum, and becomes fainter and bifurcate 

 behind ; the prothorax is more or less widely attenuate at 

 the sides, the base distinctly sinuate, and broader at the 

 hind than at the front angles ; the elytra have a slightly 

 reflexed margin, more or less broad, from behind the 

 shoulders to the apex : the epipleural fold is broad, gra- 

 dually narrowing from base to apex, more or less strongly 

 concave from near the base to the apex : the prosternum 

 is more or less strongly compressed before the cox» ; the 

 mesosternum is convex, declivous in front, broadly and 

 deeply channelled along its length, and with a triangular 

 excision at the front margin, its episterna are triangular 

 and more or less broadly shut out from the sides of the 

 mesosternum by the epimera, which are very largely de- 

 veloped ; the episterna of the metathorax are narrow, the 

 sides parallel, and the epimera are very distinct ; the inter- 

 coxal process is narrow and attenuate at apex ; the legs are 

 long, slender, the tibite linear and more or less strongly 

 asperous ; the first joint of the posterior tarsi is shorter 

 than the last, and the claws are very elongate. 



The position of this very remarkable genus, as well as 

 that of B rises, Pascoe, is at present very uncertain. 



