482 Mr. B. P. Uvaiov— ^ Revision of 



1 c. Bryophyma debilis sigillata (BoL). 



**1908. Acridium sigillatum, I. Bolivar, Mem. Soc. Ent. Belg. xvi. 

 p. lll.no. 111. ~ 



Specimens from Mashonaland are somewhat more slender 

 and smaller than the type from the Congo, the tj^pical black 

 dots on the pronotiim bein^ also not always well developed, 

 so that they may be regarded as transitional to B. debilis 

 picta, but still they are more like those of sigillata. 



Geographical distribution. Jjulaabourg (M.M.; type of 

 A. sigillatum^ Bol.); Salisbury, Mashonaland (B.M. ; O.M.); 

 S. Rhodesia (CM.). 



VIII. Grenus Rhytidacris, tiov. 



Frontal ridge in profile feebly convex, distinctly inclined, 

 forming a very wide curve with the fastigium. The latter 

 very strongly sloping, distinctly impressed, hexagonal, but 

 not separated from the frontal ridge, its margins raised, 

 convergent behind. Distance between the eyes narrower, 

 or scarcely broader than the base of the frontal ridge, which 

 is narrowed below the oceilnm. The height of an eye in 

 both sexes more than the height of the subocular sulcus. 

 Pronotum compressed laterally, somewhat narrowed but 

 scarcely constricted in the prozona, very coarsely punctured 

 or callously rugose ; its front margin rounded or slightly 

 prominent; hind angle not less than 90°, more or less 

 rounded; median keel more or less raised, convex in profile. 

 Elytra in the basal half subcoriaceous, with the reticulation 

 moderately dense; strongly narrowed towards the apex, 

 which is lancet-shaped and bent backwards. Wings slightly 

 infumated apically, colourless elsewhere. Hind femora 

 basally strongly dilated and thickened ; the supero-external 

 area granulated ; supero-median and supero-external keels 

 strongly denticulate. Hind tib.se with 7-8 outer and 9-10 

 inner spines. 



The shape of the frontal ridge which is somewhat dilated 

 between the antennae, the structure of the hind femora, and 

 the peculiar ocellar fasciae on the elytra indicate a relation- 

 ship to the group Acridoderi, and particularly to the genus 

 Phyxacra^ from which Ehylidacris differs, however, in many 

 important characters, as is evident from the key to genera. 

 In fact, it is a connecting-link between the Acridoderi and 

 the Anacridium group of genera. 



One species, besides the genotype, is known. 



