414 Mr. C. 0. Waterliouse on new Genera and 



furnished with a few acute thorn-like spines on both their 

 edges ; tarsi rather slender. Fifth segment of the abdomen 

 slightly triangularly emarginate. 



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



Macrotoma mutica, n. sp. 



Most nearly allied to M. sodalis, but with shorter antennas 

 and pale brown elytra, with no spine at their sutural angle. 

 Antennas not quite the length of the elytra ; the basal joint 

 not very large, narrowed towards its base, strongly but not 

 very thickly punctured ; the third joint as long as the two 

 following joints taken together, sparingly punctured ; the 

 fourth and fifth similarly punctured ; the sixth and seventh 

 more finely punctured ; the eighth to eleventh opaque, longi- 

 tudinally finely channelled ; the three apical joints together 

 as long as the third and fourth joints together. Head very 

 coarsely rugose-punctate ; the distance between the eyes about 

 equal to the width of the upper part of the eye. Thorax very 

 convex, densely and strongly rugose-punctate ; the sides irre- 

 gularly crenulate ; the posterior angles produced into a strong 

 acute spine, which is broad at its base. Elytra subparallel, 

 pale yellowish brown, without costas, rugulose, a little more 

 strongly so near the scutellum. Femora finely and not very 

 thickly punctured ; tibias less shining and rather more punc- 

 tured, with one or two acute spines on the outer edge. The 

 fifth segment of the abdomen distinctly emarginate at the 

 apex. 



Hab. Fianarantsoa [Mr. Shaw). 



Macrotoma Wrightiij n. sp. 



<$ . Nearly black, with the elytra dark brown posteriorly, 

 the tarsi pitchy. Head very rugosely punctured, closely 

 asperate-punctate posteriorly. Antennas a little longer than 

 the whole insect ; the basal joint large, closely and coarsely 

 asperate-rugulose ; the third joint very long, as long as the 

 fourth, fifth, and two thirds of the sixth taken together, 

 densely and very coarsely asperate ; the fourth to seventh 

 joints sparingly punctured, the fourth with a few asperities ; 

 the eighth and ninth joints more thickly punctured, especially 

 the ninth ; the tenth and eleventh still more densely punc- 

 tured, the eleventh with a mixture of short longitudinal 

 channels. Thorax as long as its width in front, a little more 

 than one third broader at the posterior angles than at the 

 anterior, densely and coarsely rugulose, with a slight swelling 

 on each side of the disk, and with some yellowish pubescence 

 on each side of the base ; the anterior margin trisinuous ; the 



