DYTISCID.E. 



210. Cybister africanus. 



Cybister africanus, Laporte, Mud. Ent. 99 (1834). 

 Trochalus meridionalis, Gene, De quib. Ins. Sard. i. 10 (1836). 

 Cybister africanus, Aiibe, Hydrocanth. 71 (1838). 

 , Woll, Cat. Can. Col 83 (1864). 



Habitat Canarienses (Can.), in aquis quietis rarissinms. 



The C. africanus of Mediterranean latitudes occurs, though very 

 sparingly, in the Canarian Group. Indeed the only examples which 

 I have seen were taken by myself (during April 1858) in the pools 

 at Arguiniguin, in the south of Grand Canary. 



Genus 54. DYTISCUS. 



Linnaeus, Syst. Nat. ii. 664 (1767). 



211. Dytiscus circumflexus. 



Dytiscus circumflexus, Fab., Syst. Eleu. i. 258 (1801). 



, Aube, Hydrocanth. 113 (1838). 



Dyticus circumflexus, Bridle, in Webb et JBerth. (Col) 58 (1838). 

 Dytiscus circumflexus, WolL, Cat. Can. Col. 83 (1864). 



Habitat Canarienses (?), mihi non obvius ; a Dom. Brulle in faunam 

 Canariensem admissus. 



This common European Dytiscus is admitted by M. Brulle into the 

 Canarian fauna, on the evidence of specimens presumed to have been 

 captured by Messrs. Webb and Berthelot. I have not myself met 

 with it, nor was it found by the Messrs. Crotch ; and I am conse- 

 quently unable to say from what island it was supposed to have been 

 obtained. M. Brulle of course gives us no information, for it was 

 not his habit (in the meagre list compiled for the gigantic ' Histoire 

 Naturelle des iles Canaries ') ever to record a single fact of either 

 local or geographical interest. 



Genus 55. EUNECTES. 



Erichson, Gen. Dytic. 23 (1832). 



212. Eunectes subdiaphanus. 



Eunectes subdiaphanus, Woll, Ann. Nat. Hist. viii. 100 (1861). 



-, Id., Cat. Can. Col. 84 (1864). 



, Id., Append, huj. op. u. 



Habitat Canarienses (Can.), in aquis quietis rarissimus. 



A Canarian insect, and apparently of the greatest rarity, having 

 been taken only by myself in the pools at El Charco in the extreme 

 south of Grand Canary. 



