410 Mr. C. O. Waterhouse on new Genera arid 



than the tibia. The pubescence on the intermediate tibise of 

 the male is much less. 



Hah. Fianarantsoa [Rev. W. Deans Cowan). 



Prionidse. 



Macrotoma ohscura, n. sp. 



Nigra ; capite thoraceque fortiter rugosis, hoc angulis posticis spina 

 acuta armato ; elytris coriaceis, nasi granulis minutis crebre asper- 

 sis, apice picescente, femoribus tibiisque fortiter spinosis. ^ • 



Long. 22 lin. 



Resembles M. serripes, Oliv., but with much less rugose 

 elytra. Antennae as long as the elytra and half the thorax ; 

 the first joint oblong, twice as long as broad, very rugose, and 

 with a few short spines on the margins ; the third joint a little 

 narrowed towards its apex, coarsely punctured and beset with 

 very short spines ; the four following joints smooth, sparingly 

 punctured ; the apical joints opaque, longitudinally rugose. 

 Thorax very coarsely rugose, convex, obliquely narrowed 

 anteriorly, the sides with numerous short strong spines, the 

 posterior angle furnished with a strong, acute, recurved spine, 

 the base strongly bowed in the middle. Elytra a very little 

 narrowed behind the middle, coriaceous, sparingly beset with 

 stiff yellowish hairs, the base closely beset with minute round 

 granules, the sutural angle with a short strong spine. Femora 

 and tibiae furnished with strong spines on their edges, rather 

 close together ; the anterior tibise very flat, rugose, the edges 

 closely spinose. Abdomen pitchy. 



Hab. Antananarivo. 



Macrotoma lceta } n. sp. 



Obscure picea ; capite thoraceque rugosis, flavo pilosis, hoc lateribus 

 acute spinosis, angulis postice acute productis ; elytris fulvo-ferru- 

 gineis, dense rugulosis, apice obtuso. 5 . 



Long. 20 lin. 



Antennae three quarters the length of the elytra ; the basal 

 joint subcylindrical, a little narrowed at the base, rather 

 thickly punctured ; the third joint cylindrical, smooth, sparingly 

 punctured ; the fourth to seventh joints becoming more 

 closely punctured ; the apical joints dull, longitudinally rugu- 

 lose. Thorax densely and evenly rugulose, convex, impressed 

 on each side of the disk, strongly spinose at the sides, which 

 are slightly arcuate, the posterior angles produced into a 

 strong acute spine ; the base strongly arcuate. Scutellum 

 moderately punctured. Elytra parallel, pale pitchy, closely 



