240 



MR. G. A. K. MARSHALL ON THE 



[Mar. 20, 



relation to sex, but in cinereus, dealbatus, cognatus, ojjcdinus, prasi- 

 nus, and wahlhergi there is practically no difference; while in obesus, 

 scajndaris, and horni the distinction is comparatively slight. 



The present revision has only been rendered possible by the 

 generous assistance afforded me by many friends. To the Trustees 

 of the British Museum I am much indebted for their kindly 

 peinnitting me to bring out to Africa practically the whole of the 

 material contained in the National Collection ; and my thanks are 

 particularly due to Mr. G. J. Arrow of that Institution for much 

 valuable assistance, especially in supervising the drawing of the 

 insects and correcting the proofs of this paper. My friend Prof. 

 Dr. Sjostedt of Stockholm was good enough to lend me typical 

 examples of no less than 19 species described by the old Swedish 

 authors, thus immensely facilitating the labour of identification 

 and ensuring more accurate determination. Dr. D. Sharp of 

 Cambridge, Prof. Poulton of Oxford, Mr. Peringuey of Cape 

 Town, and Dr. Schonland of Grahamstown, all generously placed 

 at my disposal the whole of the examples of this genus which 

 were to be found in the collections of which they are respectively 

 in charge. My fellow- collectors in South Africa, Mr. C. N. Barker 

 and Father O'jSTeil, have kindly contributed to my needs in their 

 usual open-handed manner; while my good friend Dr. W. Horn 

 of Berlin has most liberally procured for me quite a remarkable 

 number of new and rare species, two of which I have not seen 

 in any other collection. 



The following synoptic Table, despite its many shortcomings, 

 will probably render identification somewhat easier. 



S'pecierum Consjyect'its *. 



Prothorax iDasi utriuque fovea elongata aut rotuudata 



evidenter impressus. 

 Funiculi articulus tertius primo non, aut vix, loiigior. 

 Gens processu recurvo valde productaB. 

 Elytra late ovata, bumei'is rotmidatis, prothorax ssqualiter 



grauulatus; antenna breviores,clavaovata. 1. S. ff7'a7iosusF§.h.Y. $. 

 Elytra anguste ovata, humeris valde obliquis ; prothorax 



medio obsolete granulatus; antennte longiores, clava valde 



elongata et acuminata 2. S. cwZ^ra^MS, sp. nov., (? . 



Genaj non recurvo-productse. 



Gena3 acute angulariter dilatatas. 



Major (9^-101 mm.), thorace apice constricto. 



3. S. cinereus, sp. nov. 

 Minor (7-8 mm.), thorace apice non constricto. 



5. S. dealbatus Fahr. 

 Genoa rotundatee aut obtuse angulatae. 

 Antennae longiores, funiculi articuli terminales evidenter 



longiores quam latiores. 

 Elytra late ovata, humeris rotundatis, prothorax et elytra 



undique tequaliter granulata 1. S. granosus Fahr. $ . 



Elytra anguste ovata, humeris valde obliquis; prothorax 



medio parum elevatus ibique obsolete granulatus; 



elytra retro obsolete granulata 2. S. cwltratus, sp. nov., $ , 



* It must be noted that two species with which I am acquainted, viz. S. lateralis 

 Boh. and S. imiricat^ts Boh., are not included in this Key, owing to the fact that 

 several of the diagnostic characters here utilised are not mentioned in Boheman's 

 descriptions. 



