74 HELOPHORIDiE. 



Ochthebius riparius, Sturm, Deutsch. Fna } x. 59, tab. 222. f. a. A (1836). 

 , pygmseus, Wott. y Cat. Can. Col. 87 (1864). 



Habitat Canarienses (Fuert., Ten., Gom., Palma), hinc hide vulgaris. 



The common European 0. pygmceus is locally abundant at the 

 Canaries, where most likely it will be found to be universal. I have 

 taken it in Fuerteventura, Teneriffe, and Palma ; and in Gomera it 

 has been captured lately by the Messrs. Crotch. But hitherto it has 

 not been observed in the Madeiran Group. 



223. Ochthebius subpictus. 



Ochthebius subpictus, WolL, Cat. Macl Col. 29 (1857). 

 Habitat Maderenses (P to S to ), in aquis vix subsalinis rarior. 



Observed hitherto only in the somewhat brackish streams in the 

 north of Porto Santo, of the Madeiran Group ; and perhaps (although 

 abundantly distinct from it) it may be regarded as the representative 

 in that island of the 0. marinus of more northern latitudes. 



224. Ochthebius rugulosus. 



Ochthebius rugulosus, Woll., Cat. Mad. Col 28 (1857). 



Habitat Maderenses (P to S to ), una cum specie pr&cedente in aq 

 occurrens. 



Likewise Porto-Santan, and found in company with the subpictus, 

 both species having been detected by myself during April 1855. 



225. Ochthebius lapidicola. 



Ochthebius lapidicola, WolL, Cat. Can. Col. 87 (1864). 



Habitat Canarienses (Ten., Gom., Palma, Hierro), in aquis et aquosis 

 late sed parce diffusus. 



Widely spread over the Canarian archipelago, to which (so far as 

 observed hitherto) it is peculiar. I have taken it in Palma ; and it 

 has been met with sparingly by the Messrs. Crotch in Teneriffe (at 

 Souzal and Ycod el Alto), Gomera, and Hierro. The examples from 

 the last-mentioned island were found about the wet rocks at the 

 Fountain (on the descent from the Cumbre) in the upper part of 

 the sylvan region of El Golfo. 



Genus 61. HYDR-ffiNA. 



Kugelann, in Schmid. Mag. i. 578 (1794). 



