132 Mr. W. L. Distant 07i new 



(inside m^) 16*5; post- palatal length 40; length of maxillary 

 tootli-row 37. 



JJah. llumruti, Laikipia Plateau. Altitude 6000 feet. 



Ti/pe. Adult male. Original number 1476. Collected on 

 November 4th, 1910. 



This Laikipia Dassie is distinguished from the Kenya 

 form by its far paler colour, both of the dorsal and ventral 

 surfaces. 



Mr. Kemp, while collecting on the Aberdare Mountains 

 in the early part of last year, obtained several specimens of 

 Dendrohijrax, and these appear to be quite similar to the 

 Laikipia series and may be regarded as representatives of the 

 same race. 



XV. — New Genera and Species of Cicadidse. 

 By W. L. Distant. 



Genus Rihana. 

 Rihana, Dist. Ann. & Mag. Nat. Hist. (7) xi.x. p. 42G (1904). 



Type, R. ochracea, Walk. 



Rihana numida, sp. n. 



Head and prouotum black ; head with a basal triangular 

 spot, an apical spot and the transverse lateral carinations to 

 front, lateral margins, ocelli, and irregular spots between 

 ocelli and eyes on vertex, dull reddish ; prouotum black, much 

 sufi'uscd with dull reddish, Ijusal and lateral margins ochra- 

 eeous, interiorly narrowly margined with black ; mesonotum 

 black, the lateral margins, the margins of two central ob- 

 conical spots connected with anterior angles of basal cruei- 

 form elevation, which is of the same colour, dull redilish, 

 anteiior angle of cruciform elevation annulatcd with black ; 

 margins of mesonotum ochraceous ; abdomen al)ove black, 

 a greyish spot on each side of second abdominal segment, 

 anal segment reddish ochraceous at base, with a central 

 black spot ; body beneath and legs ochraceous ; face and 

 abdomen more testaceous, the former wi;h the interspaces 

 between the transverse carinations black ; sternum and 

 lateral abilominal margins somewhat longly palely pilose ; 

 te<»'nuna and wings hyaline, the former on basal two-thirds 

 moderately tinted with ochraceous, the costal meujbranc ami 



