BY REV. T. BLACKBURN. 507 



of the pronotum on the part behind the horn. The female (to 

 which Bainbridge gave the name) differs from that of recticorme 

 (which it closely resembles) chiefly by its frontal elevation scarcely 

 defined and not having two approximated tubercles one on either 

 side of its middle, and by the strong sinuation of the external 

 margin of its left mandible (viewed from above). 



B. RECTicoRNE, Guer. 

 As far as I can ascertain no description of the female of this 

 species has been published. In common with the other species of 

 the same Subgroup, the female differs from the male much less 

 widely than do the females of species belonging to the First Group 

 and the First Subgroup of the Second Group. It is, however, 

 readily distinguished from its male by the presence of a distinct 

 frontal elevation in the form of a carina which bears two approxi- 

 mate tubercles, one on either side of the middle, by the middle 

 of its clypeal elevation being a small tubercle instead of a short 

 stout horn, by the absence of the upright horn in the centre of 

 the retuse front of the pronotum, and by the presence of two 

 approximate tubercles immediately behind the middle part of the 

 front margin of the pronotum. 



B. TENAX, sp.nov. 

 Mas. Latum, robustum; sat nitidum; supra glabrum; subtus 

 hirsutum; rufum vel rufopiceum; mandibulo sinistro (superne 

 viso) extus vix sinuato; capite (parte postica excepta) sat crebre 

 sat rugulose punctulato; clypeo antice verticali; eminentia clypeali 

 simplici, fere semicirculari (adversus clypeum viso); fronte (a 

 latere viso) sat horizontali; eminentia frontali ut cornu modicum 

 (hoc ad apicem breviter bifido) elevata; prothorace quam longiori 

 fere duplo latiori, supra subtilissime sat sequaliter et acervatim 

 sat grosse punctulato, antice insequaliter retuso cornubus 4 serie 

 transversa armato (cornubus intermediis porrectis comprcssis 

 contortis, externis spiniformibus divaricatis), parte pone cornua 

 intermedia foveis 2 magnis maxime profundis impressa, lateribus 

 vix perspicue serrulatis, angulis anticis mucronatis valde promi- 

 nentibus posticis nullis; scutello Isevi; elytris 15-striatis, striis 



