DYTISCID^E. G5 



The H. minutissimus of central and southern Europe is locally 

 abundant in the Canarian Group. It has been taken in Grand 

 Canary, Teneriffe, Gomera, and Palma. 



194. Hydroporus delectus. 



Hydroporus delectus, Wott., Cat. Can. Col 76 (1864). 

 Habitat Canarienses (Ten.), minus frequens. 



Taken hitherto only in Teneriffe, where it appears to be scarce. 

 It may be regarded as the representative at the Canaries of the Eu- 

 ropean H.flavipes, to which it is closely allied. 



195. Hydroporus compunctus. 

 Hydroporus compunctus, Wott., Append, huj. op. n. 

 Habitat Canarienses (Ten.), a DD. Crotch semel tantum repertus. 



The only specimen which I have seen of this Hydroporus was 

 taken by the Messrs. Crotch, during the summer of 1864, in Tene- 

 riffe I believe, in the Barranco at Ycod el Alto. a 



196. Hydroporus xanthopus. 



Hydroporus xanthopus, Steph., III. Brit. Ent. v. 393 (1832). 



lituratus, Aube, Hydrocanth. 589 (1838). 



xanthopus, WoU., Cat. Can. Col. 77 (1864). 



Habitat Canarienses (Ten., Gom.), usque ad 8000' s. m. ascendens. 



Found in Teneriffe and Gomera (in the latter by the Messrs. Crotch), 

 of the Canarian Group, and ascending to at least 8000 feet above the 

 sea. The Canarian specimens differ a little from the ordinary Eu- 

 ropean ones ; but the discrepancies are so small and unimportant 

 that I do not think they indicate more than a slight geographical 

 variety. 



197. Hydroporus planus. 



Dytiscus planus, Fab., Ent. Syst. i. 195 (1792). 

 Hydroporus holosericeus, Steph., III. Brit. Ent. ii. 61 (1829). 



planus, Aube, Hydrocanth. 583 (1838). 



, Wott., Cat. Can. Col. 77 (1864). 



Habitat Canarienses (Ten.), hinc inde vulgaris. 



Occurs abundantly in certain streams of Teneriffe, at intermediate 

 elevations, but it has not yet been detected in any of the other islands. 

 As in the case of the last species, the Canarian examples are not quite 



