the Old World Cyrtaca)itliacr'uii. 475 



tlie latter also in tlie shape of the pronotum and in the 

 coloration of the hind M'ings, bnt it is not known whether 

 these characters are constant. 



Geographical distribution. Besides the type, which is from 

 Gondokoro, N. Uganda, only one specimen (a male) is known 

 to me ; it belono^s to Prof. H. Ebner, of Vienna, and was 

 taken by him at Talodi, Anglo-Egyptian Sudan. 



II. Genus Acridodekes, Bol. 



1889. Acridoderes, Bolivar, Jourii. Scien. Mat. Phys. e Natur. Acad. 

 Lisboa, i, p. 163. 



As I have the genotype of Acridoderes before me, I am in 

 a position to define the differences between this genus and 

 Fhyocacra (see the key to genera, Part !._, p. 138) and also 

 to determine what other species should be referred to it. 

 Amongst the species described under Acridoderes four belong 

 to other genera, as follows : A. piinctatiis, Kirby, and tecti- 

 ferus, Karschj to Rhytidacris, Uv. (p. 483) ; A. aniethystinus, 

 Bol., to Pachynotacris, Uv. (p. 480) ; and A. lavigatus, Bol., 

 to Anacridoderes, Uv. (p. 477) ; while A. prasi?ius, Karscli, 

 unknown to me save by description, probably belongs to an 

 undescribed genus. Caloptenus strenuus, Walk., included 

 in the genus Acridoderes by Kirby, belongs to Phyxacra 

 (see p. 474). Thus, only the genotype remains in the genus, 

 but I do not hesitate to refer to it two more species 

 originally described under other generic names, viz., Cyrta- 

 canthaa^is validiceps, Karsch, and Phyxacra nigrispiniSj 

 Rehn. As I have seen only one of the three known species, 

 the following key is based on the original descriptions and 

 should be considered as preliminary : — 



Key to the Species. 



1 (4). Elytra extending beyond tke bind knees in 



botli sexes. 



2 (3). Larger. Transverse sulci of the pronotum 



tine. Elytra extending well beyond the 

 bind knees, even in the female. General 

 coloration darker, with numerous black- 

 ish dots on the head and pronotum ; 

 hind femora with two blackish fasciie on 

 the upper side; hind tibiae with tlie 

 extreme base shining black, then ^vith a 

 narrow, indefinite, pale ring, elsewhere 

 brownish violaceous above and pale be- 

 neath ; tibial spines yellowish with the 

 tips and the whole of the hind surface 

 black. (Angola; Mashonaland.) 1. crassus, Bo\, 



3 (2). Smaller. Transverse sulci of the pronotum 



deep. Elytra in the female onlv slightlv 



31* 



