OZ GARABID^E. 



' 



from being accompanied by various undoubted Madeiran insects, 

 there could be no question as to its habitat (which indeed its near 

 affinity with the T. fimicola would have made sufficiently evident)*. 



Genus 42. TRECHUS. 

 Clairville, Ent. Ifelv. ii. 23 (1806). 



151. Trechus detersus. 



Trechus detersus, WolL, Cat. Can. Col. 62 (1864). 

 Habitat Canarienses (Lanz., Fuert.), sub lapidibus, passim. 



Occurs in Lanzarote and Fuerteventura, of the Canarian Group, 

 where it may be regarded as the representative of the common 

 European T. minutus (which at first sight it greatly resembles). As 

 stated elsewhere, however, I believe it to be truly distinct from that 

 species. 



152. Trechus umbricola. 



Trechus umbricola, WolL, Ins. Mad. 67, tab. ii. f. 3 (1854). 

 , Id., Cat. Mad. Col. 20 (1857). 



Habitat Maderenses (Mad.), in sylvaticis humidis editioribus hand 

 infrequens. 



Peculiar to the higher elevations of Madeira proper, occurring in 

 the moist sylvan districts, but by no means abundantly. 



153. Trechus nigrocruciatus. 



Trechus nigro-cmciatus, WolL, Ins. Mad. 64. tab. ii. f. 1 (1854). 

 1 Id., Cat. Mad. Col. 18 (1857). 



Habitat Maderenses (Mad.), in humidis editioribus sylvaticis rarus. 



This fine Trechus is peculiar to Madeira proper, where it occurs 

 (for the most part sparingly) in the damp sylvan -districts of a high 

 elevation. 



154. Trechus laevis. 



Trechus Isevis, WolL, Cat. Mad. Col. 18 (1857). 

 Habitat Maderenses (Mad.), in locis similibus ac praecedens. 



4-1 



It is just possible that this Trechus may be but a large, polished, 

 somewhat flattened, and lightly striated form of thejlavomarginatm ; 



* The T. Jansonianus seems to differ from the fimicola, principally, in having 

 its prothorax and elytra darker (though never black like the head), and the latter 

 shorter behind so as to expose more of the pygidium. Its head and prothorax 

 also are just perceptibly narrower ; and the former has a minute, rounded, punc- 

 tiform fovea in the centre of the forehead. 



