36 



is paler, the surface less shining, or more alutaceous (though free 

 from the very lightly impressed, remote additional punctules which 

 are always more or less traceable in that species, when viewed beneath 

 a high magnifying power), and the humeral angles of the elytra are 

 more porrected or acute ; but I was subsequently induced, through 

 the strongly expressed opinion of Schauui, to record it as distinct. 



102. Olisthopus maderensis. 



Olisthopus maderensis, Woll., Ins. Mad. 35, tab. i. f. 7 (1854). 

 , Id., Cat. Mad. Col. 12 (1857). 





Habitat Maderenses (Mad.), in locis editioribus praesertim vulgatis- 

 simus, usque ad summos montes ascendens. 



This is the universal Olisthopus of Madeira proper, though it has 

 not yet been observed in any of the other islands of the Group. II 

 abounds at intermediate and lofty elevations, particularly the latter, 

 ascending to the very summits of the peaks. 



103. Olisthopus acutangulus. 



Olisthopus acutangulus, Woll., Cat. Mad. Col. 13 (1857). 

 Habitat Maderenses (Mad.), rarissimus; a Dom. M. Park semel captus. 



A single example only of this Olisthopus, taken by Mr. M. Park 

 in Madeira proper (I believe near Funchal), has hitherto been brought 

 to light : and it is possible that it may be merely some local state of 

 the 0. maderensis in which the elytra are a little more coarsely alu- 

 taceous and deeply striated, with their shoulders a trifle more acute, 

 and in which the prothorax is smoother and more finely margined, 

 and the limbs are a shade darker in tint ; but until further material 

 has been obtained to judge from, I do not think it would be safe to 

 treat it as such. 



104. Olisthopus glabratus. 



Olistopus glabratus, Srulle, in Webb et Berth. (Col.) 56 (1838). 

 Olisthopus glabratus, Woll., Cat. Can. Col. 43 (1864). 



Habitat Canarienses (Can., Ten., Gom., Hierro), ubique vulgaris. 



Strictly the representative at the Canaries of the Madeiran 0. ma- 

 derensis, to which indeed it is very closely allied. Still, I have else- 

 where expressed my conviction that it is no modification of that 

 species (however nearly resembling it) ; for it retains its characters 

 unchanged throughout all the islands (four in number) of the Cana- 

 rian archipelago in which it has been observed, and under many 





