1900.] Catalogue of the Coleoptcra of South Africa. 549 



A". Anterior tibiae with three long outer teeth and two shorter but 

 strong serrate teeth. 



Cephalic horn short, not curved ; prothoracic excavation shallow, 

 uni-tubcrculate in both sexes ; elytra deeply punctured, strife 

 distinct monoccros. 



Oryctes boas, Fabric, 

 Plate XL., fig.X 3;. 



Head, prothorax, and tibiae piceous red or very dark brown, elytra 

 chestnut-brown, femora and under side also chestnut-brown ; head 

 rugose, clypeus triangularly emarginate at tip, and with the angles 

 triangularly dentate, gense semicircular, in the male the frontal 

 part is armed with a very long horn, compressed and strongly curved 

 backward and hooked at tip, while the female has a short, sharply 

 triangular tooth ; in the male the anterior part of the prothorax is 

 deeply excavate from the anterior margin to three-fourths of the 

 length, and strongly bi-dentate in the posterior margin, this excava- 

 tion is villose in the anterior part and strongly shagreened in the 

 ■centre, the posterior part of the disk is convex and smooth, the lateral 

 part is remotely punctulate ; in the female there is in front a short, 

 semicircular, villose, shallow impression transversely foveolato-plicate, 

 and the discoidal part for two-thirds of the length is roughly and 

 irregularly plicate with the intervening spaces punctulate, the hind 

 part of the disk is smooth and impunctate ; scutellum closely and 

 deeply punctate ; elytra more sinuate laterally and a little more 

 ampliate past the middle in the male than in the female, very faintly 

 striate and very remotely punctulate ; mesosternum and meta- 

 sternum cicatricose except in the median part of the latter. 



Length 41-44 mm. ; width 19-21 mm. 



Hah. The whole of South Africa except the south-western part 

 of Cape Colony, 



Oryctes monoceros, 

 Plate XL., lig.^ so- 

 Head and prothorax piceous black or piceous red, elytra dark 

 chestnut-brown, under side and femora light chestnut-brown ; clypeus 

 very broadly and deeply emarginate at tip, and with the two angles 

 strongly diverging and produced into a very sharp, recurved process, 

 frontal part produced into a very high triangular ledge culmi- 

 nating in a sharp, vertical, short horn in both sexes, the whole head 

 is very rugose except for a small median space at the base, gense 



