386 On the Coleopterous Genus Macrotoma. 



In the centre), and the tenth and eleventh joints are entirely 

 rugulose. There is no distinct opaque lateral spot till the 

 sixth joint, where there is a long and narrow one ; on the 

 seventh the apical spot is longer, and there is also one at the 

 base ; on the eighth the basal and apical spots nearly meet ; and 

 the whole of tlie side of the ninth joint is opaque. The anterior 

 femora are very rugose, with short strong spines above and 

 below ; the tibiae are finely rugulose, with short spines on 

 both edges. The intermediate femora are smooth and shining 

 at the base, with a few large punctures ; the apical half 

 is more opaque and finely rugulose ; the spines on the 

 upper and lower edges are strong and acute. The tibife are 

 very finely rugulose ; the spines on the upper edge are strong, 

 those on the underside are very small. [The posterior legs 

 are wanting.] 



Length 29 lines. 



Hah. Madagascar, Betsileo country. Collected by Mr. 

 Thomas Waters. 



Macrotoma dimidiaticornis^ Dej. 



(J. Black above, pitchy beneath ; parallel, convex. Head 

 deeply and irregularly punctured between the eyes 5 the vertex 

 and sides closely and rather finely granulose. Antennse 

 reaching to a little beyond the middle of the elytra, the fourth 

 and following joints pitchy red ; the basal joint strongly 

 punctured, but the punctures are not crowded together ; the 

 third joint as long as the fourth, fifth, and half the sixth 

 joints taken together, shining, with a few deep punctures ; 

 the fourth to eighth joints shining and sparingly punctured 

 above, the fifth to eighth with a few longitudinal punctures 

 at the base and apex ; the ninth is less shining, and at the 

 base and apex slight longitudinal lines may be traced ; the 

 tenth and eleventh are dull, but scarcely rugose ; taken to- 

 gether they are as long as the third joint. Tliorax about one 

 third narrower in front than at the base, very closely and 

 rugosely punctured, somewhat dull, and more or less pubes- 

 cent, the disk with three irregular impressions, the margins 

 irregularly dentate. Ellytra parallel, densely and coarsely 

 rugose, the usual longitudinal lines obsolete. Anterior femora 

 with not very numerous asperate punctures, and with a few 

 very short teeth below ; the tibiae sparingly punctured, with a 

 few tubercles beneath. The posterior legs similar, but a little 

 smoother. Metasternum finely and closely punctured, and 

 clothed with yellowish pubescence. The apex of the abdomen 

 with fulvous hair. 

 Length 21-25 lines. 



