.CARABID.E. 53 



nevertheless I believe that it is really a distinct, though closely 

 allied, species. It occurs, rather sparingly, in much the same spots 

 as the nigrocrudatus within the sylvan districts of Madeira proper, 

 at a high elevation. 



155. Trechus flavomarginatus. 



Trechus flavomarginatus, WoU., Ins. Mad. 65, tab. ii. f. 2 (1854). 

 , Id., Cat. Mad. Col. 19 (1857). 



Habitat Maderenses (Mad.), in sylvaticis et subsylvaticis ubique 

 vulgatissimus. 



The present Trechus is the universal one in the sylvan and sub- 

 sylvan districts of Madeira proper, occurring in profusion from about 

 2000 to 5000 feet above the sea ; but it has not yet been observed 

 in any of the other islands of the Group. 



156. Trechus flavolimbatus. 



Trechus flavolimbatus (Schauni), Wott., Ann. Nat. Hist. xi. 216 (1863). 

 , Id,, Cat. Can. Col 63 (1864). 



Habitat Canarienses (Can., Ten., Gom., Palma, Hierro), in sylvaticis 

 et subsylvaticis vulgatissimus. 



This is strictly the Canarian representative of the Madeiran 

 T. jlavomarginatus ; indeed I am far from satisfied that it is more 

 than a topographical modification of that insect. Nevertheless 

 as the slight features which characterize it remain quite constant 

 throughout the whole Jive islands of the Canarian archipelago in 

 which it has been observed, it is difficult to regard its small pecu- 

 liarities as the result of any combination of local influences ; and it 

 was on this account that, at the instigation of Schaum, I described 

 it as a distinct species. It abounds, in sylvan and subsylvan spots, 

 throughout every portion of the Canarian Group except Lanzarote 

 and Fuerteventura where it has not yet been detected, and where 

 I suspect that it does not exist. 



157. Trechus signatus. 



Trechus signatus, Woll, Cat. Mad. Col. 19 (1857). 

 Habitat Maderenses (Mad.), in sylvaticis parce occurrens. 



Occurs sparingly within the sylvan districts of Madeira proper, 

 the few examples which I have yet seen having been captured by 

 myself (during June 1855) from beneath fallen leaves at the extreme 

 head of the S 18 Cruz ravine. 



