476 Transactions SoutJi African Pliilosoijliical Society, [vol. xii. 



Easily distinguished from C. iJimcticoUis by the armature of the 

 head and the short, not compressed, pygidium, as well as by its 

 broader facies. 



Hab. Basutoland (Mafeteng). 



Chieon volvulus, Klug, 

 Monatsb. Berl. Ac, 1855, p. 656. 



Klug redescribes as follows in Peters' Eeis. n. Moss., 1862, 

 p. 247, another species of Chiron of the identity of which he is 

 somewhat doubtful. 



" C. Head and thorax closely punctate, elytra crenato-striate. 

 Length 3|- lin. 



One specimen from Tette, distinguished by a pale chestnut-brown 

 colour, but otherwise so little different from the well-known C. cylin- 

 dricus {Sinodenclron digitatum, Fab.) of Bengal, which occurs also in 

 Senegal, that I long doubted if one was justified in separating it as 

 a distinct species. What decided me was that the head and pro- 

 thorax are perhaps somewhat more finely and particularly more 

 densely and evenly punctate everywhere, so that there is no smooth 

 place between the punctures, as is generally the case in C. cylin- 

 dricus, and the punctures filling the striae on the elytra appear 

 to be somewhat larger and the corresponding intervals narrower. 

 Still all this is scarcely perceptible, and the value of the species 

 can only be decided when more specimens have been examined." 



C. digitatus, Fabr., is closely allied to C. inincticollis, Har., and as 

 Klug seems to hint at the possibility of C. volvulus being the same 

 species it may be well to mention the difference between digitatus 

 and pimcticollis. 



C. digitatus is smaller than the smallest example of puncticollis 

 I have met with, and is proportionately more slender ; it is equally 

 punctured all over the prothorax, whereas in puncticollis the punc- 

 tures, which are similarly spaced, leave a smooth, impunctate, longi- 

 tudinal area in the centre ; the anterior tibiae have an additional 

 serrate tooth above the basal one in digitatus, but this tooth is not 

 very distinct, and the pygidium in the male is very closely pitted on 

 each side of the sub-carinate median part, whereas in puncticollis 

 this median part of the pygidium is more developed, and the whole 

 is impunctate except for a few setigerous pits round the margins. 



My examples of C. digitatus are from Senegal. 



