78 



HYDROPHILID^. 



it has been detected in Lanzarote, Fuerteventura, Grand Canary, 

 Teneriffe, and Gomera. 



Genus 65. BEROSUS. 

 Leach, Zool Miscell iii. 92 (1817). 



233. Berosus spinosus. 



Hydrophilus spinosus (Stev.), Scho'n., Syn. Ins. ii. 8 (1808). 

 Berosus spinosus, Ahr., Fna Ins. Eur. iii. f. 5 (1816). 



, Brulle, in Webb et Berth. (Col.) 59 (1838). 



, Woll, Cat. Can. Col. 91 (1864). 



Habitat Canarienses (sec. MM. Webb et Berthelot), mihi non obvius. 



I have not myself met with this European Berosus in any of these 

 Atlantic islands ; but since it was included in the Canarian list of 

 M. Brulle, on the evidence of specimens (which I have carefully 

 examined) supposed to have been captured by MM. Webb and Ber- 

 thelot, and since there seems no reason why it should not occur in 

 (for instance) some of the brackish streams and pools of Lanzarote 

 or Fuerte ventura, I think perhaps that it should scarcely be refused 

 admission into our Catalogue. At the same time I cannot but call 

 attention to the unsatisfactory nature of the evidence for its occur- 

 rence, M. Brulle (as in the case of every single species which his 

 meagre list includes) giving us no word of information concerning 

 either its habitat or anything else. 





Genus 66. HYDROBIUS. 

 Leach, Zool. Miscell. iii. 93 (1817). 



234. Hydrobius haemorrhous. 



Hydrobius hseniorrhous, Wott., Cat. Can. Col. 92 (1864). 



Habitat Canarienses (Can., Gom.\ ad rupes aquosas in locis editiori- 

 bus hinc inde vulgaris. 



A Canarian species, which occurs about damp rocks and small 

 trickling streams at high and intermediate altitudes. In such situ- 

 ations I met with it sparingly in Grand Canary, and it has been 

 found subsequently in Gomera (much more abundantly) by the 



Messrs. Crotch*. 



* The H. hcsmorrhous differs from the Madeiran H. marchantia in its more 

 oval and much less convex body, in the more rounded edges of its prothorax, in 

 its very much coarser punctation, its considerably deeper and longer sutural 

 stria, and in the extreme tip of its palpi being black. 



