DYTISCID^l. 



Genus 49. HYDROPORUS. 



Clairville, Ent. Helv. ii. 183 (1800). 



190. Hydroporus musicus. 



Hydroporus musicus, King, Symb. Phys. pi. 33. f. 12 (1829). 



, Aube, Hydrocanth. 475 (1838). 



1 Wott., Cat. Can. Col. 75 (1864). 



Habitat Canarienses (Can.}, in aquis rarissimus. 



Observed hitherto only in Grand Canary, where it appears to be 

 scarce. I possess examples from Egypt, which, however, differ a 

 little from the Canarian ones. 



191. Hydroporus confluens. 



Dytiscus confluens, Fab., Ent. Syst. i. 198 (1792). 

 Hydroporus confluens, Wott., Ins. Mad. 87 (1854). 



. Id. Cat. Mad. Col. 27 (1857). 



, Id., Cat. Can. Col. 75 (1864). 



Habitat Maderenses (in Bugio sola haud detectus) et Canarienses 

 f., Gom.), hinc inde vulgaris. 



The common European H. confluens is widely spread over these 

 Atlantic islands, in which it will most likely be found to be universal 

 wherever there are pools or streams. It is, however, far more abun- 

 dant at the Madeiran Group (where it has been taken in all the islands 

 except the Southern Deserta) than at the Canaries, in the latter of 

 which it has been found as yet only in Fuerteventura and Gomera. 



192. Hydroporus geminus. 



Dytiscus geminus, Fab., Ent. Syst. i. 199 (1792). 

 Hydroporus geminus, Steph., III. Brit. Ent. ii. 57 (1829). 



, Aube, Hydrocanth. 491 (1838). 



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



Habitat Canarienses (Fuert.), rarissimus. 



Captured by myself in Fuerteventura, of the Canarian Group, but 

 it has not yet been observed in any other of the islands. It is a 

 common species throughout Europe. 



193. Hydroporus minutissimus. 



Hydroporus minutissiinus, Germ., Ins. Spec. Nov. 31 (1824). 

 -, Aube, Hydrocanth. 493 (1838). 



trifasciatus, WolL, Ann. Nat. Hist, xviii. 453, pi. 9. f. 3 (1846). 

 minutissimus, Id., Cat. Can. Col. 76 (1864). 



Habitat Canarienses (Can., Ten., Gom., Palma), hinc inde vulgatis- 

 simus. 



