80 CANAMAN COLEOPTERA. 



The present LaccophUus differs both from the minutus and Jiyalinus 

 of more northern latitudes in its larger size, as well as in its wider, 

 more elliptic, and convexer body. As regards its colouring, the head 

 and prothorax (the latter of which is but slightly produced in the 

 centre behind) are of a more or less diluted rufo -testaceous hue ; 

 whilst the elytra are of a dark olivaceous brown, with the ordinary 

 oblique patches arising out of the subpellucid margin but faintly ex- 

 pressed. It was taken by Mr. Gray and myself in the valley of San 

 Sebastian of Gomera, during February 1858 ; and by myself, during 

 the following April, at El Monte, Teror, and Arguiniguin, in Grand 

 Canary. I have also received it from Dr. Heer, taken by M. Hartung 

 in Teneriffe. 



Genus 42. COLYMBETES. 

 Clairville, Mit. Helv. ii. 198 (1806). 



126. Colymbetes coriaceus. 



Dytiscus coriaceus, Hoffm. in litt. 

 Meladema coriacea, Lcqwrte, Etucl. Ent. 98 (1834). 

 Colymbetes coriaceus, Auhe, Hydrocanth. 220 (1838). 

 Dyticus coriaceus, Bridle, in Webb et Berth. ( Col) 58 (1838). 



Habitat in aquis quietis Canaria) et TenerifFce, sat frequens. 



The C. coriaceus, found in the south of Europe and the north of 

 Africa (and which is represented at Madeira by the C. lanio), occurs 

 sparingly at the Canaries. I once however took it in tolerable abun- 

 dance at the head of the Barranco Santo, near S'" Cruz, of Teneriffe ; 

 as also in the large pools at El Charco, — the sandy region adjoining 

 Maspalomas, in the extreme south of Grand Canary. From Tene- 

 riffe it has likewise been communicated by the Barao do CasteUo de 

 Paiva ; in which island it was also captured by M. Hartung and 

 Dr. Crotch. 



Genus 43. AGABUS. 

 Leach, Zool Miscell. iii. 09, 72 (1817). 



127. Agabus nebulosus. 



Dytiscus nebulosus, Furst., Nov. Spec. Ins. 56 (1771). 



bipunctatus, Fab., Munt. Ins. 190 (1787). 



Agabus nebulosus, Aube, Hydrocanth. 328 (1838). 



Colymbetes bipunctatus, Bridle, in Webb et Berth, (Col.) 58 (1838). 



Agabus nebulosus, WolL, Ins. Mad. 84 (1854). 



, Id., Cat. Mad. Col. 25 (1857). 



Habitat Canariam et Teneriffam, in aquis, passim. 



The common European A. nebulosus appears to be local in these 

 islands, the only spots in which I have hitherto observed it being 

 near Tafira in Grand Canary and at Las Mercedes in Teneriffe, — in 



