64 CANARIAN COLEOPTEEA. 



funde subcrenato-striatis ; antennis nigro-fuscescentibus, ad basin, 

 palpis pedibusque testaceis. — Long. corp. lin. l^-lf. 



Habitat in Tcneriffa sylvatica excelsa, sub ligno corticeque putrido 

 in montibus humidis supra Tagananam mense Maio a.d, 1859 eaptus. 



Closely allied to the Madeiran T. custos, but unquestionably distinct. 

 It may be known from that species by its frontal sulci being deeper 

 and much more curved ; by its pro thorax being more cordate (or 

 narrower behind), -with the extreme angles however much more pro- 

 minent ; "bj its elytra being flatter, more coarsely subcrenate-striated, 

 more thickly margined at the sides, and o6ovate (their widest portion 

 being towards the base) ; and by its antennae being rather longer and 

 darker. Like that insect it is apparently confined to the sylvan dis- 

 tricts of a high elevation, but is excessively rare, — the only locality 

 in which I have taken it being in the forest above Taganana, of 

 TenerifFe, immediately below the Cumbre. Like the T. custos of 

 Madeira, it is found in the dampest spots, — beneath rotting wood 

 and leaves, and under the moist decaying bark of trees. 



Genus 35. THALASSOPHILUS *. 

 WoU., Lis. 3Iad. 71 (1854). 



98. ThalassopMlus Whitaei. 



Trechus littoralis?, Bndle[necDeJ.\ in Webb et Berth. (Col.) 58 (1838). 

 Thalassophilus Whitei, IVoH., Lts. Mad. 71. tab. ii. f. 5 (1851). 

 , Id., Cat. Mad. Col. 21 (1857). 



Habitat ad rupes aquosas et per margines ri\'nlorum in Canaria, 

 Teneriffa, Gomera et Palma, rarissimus. 



The T. Whitcei, which is of the greatest rarity in Madeira and 

 Porto Santo, seems to be widely spread over the islands of the Cana- 

 rian Group, — where, however, it is exceedingly scarce. I have cap- 

 tured it in Grand Canary (amongst wet stones and rocks at the edges 

 of a small trickling stream on the southern side of, and within, the 

 great crater of the Bandama) ; in Teneriffe (near S'^ Cxniz and at 

 Las Mercedes) ; as also in Palma ; and it was likewise taken by Dr. 

 Crotch at Tcod el Alto in Tcnerifte, as well as in Gomera. Although 

 usually quite as pale as the Porto-Santan type from which I origi- 



* Having established it in the ' Inseeta Maderensia,' I retain this genus liere ; 

 nevertheless it seems doubtful whether it can be strictly upheld as more than a 

 Division of Trechus. "Your Thalaasvphilus" writes Dr. Schaum, ''is only a 

 Section of Trechus, to which tiie T. long team is belongs. The true distinction of 

 the Section Thalassophilus is, that tlie recurved first stria, of the elytra, empties 

 itself into the third one ; whereas in Trcchns proper it empties itself into the 

 fifth." 



