66 CANARIAN COLEOPTERA. 



(Subfam. XIV. BEMBIDIADES.) 



Genus 37. TACHYS. 

 (Ziegler) Steph,, ///. Brit. Ent. ii. 4 (1829). 

 Following Schaum and others, I have retained Tachys as distinct 

 from Bemhld'mm, since it appears to possess characters which render 

 its isolation therefrom more desirable than is the case with the various 

 other groups which are now usually treated as component parts of 

 the Bemhklia. Thus, apart from minor distinctions of proportions 

 and outline, whilst in Bemhidium and its subdivisions the short scu- 

 tellary stria of the elytra is more or less traceable and the sutural 

 one is simple, in Tacliys, on the contrary, the scutellarj' stria is 

 absent and the sutural one is recurved at its apex. The anterior 

 tibia3, also, in the latter are slightly more dilated, and are lopped-off 

 obhquely towards their outer extremity, — a structure which gives 

 them the appearance of being somewhat curved *. 



100. Tachys bistriatus. 



Elaphrus bistriatus (3%.), Dnfts., Fna Amtr. ii. 205 (1812). 

 Bembidium bistriatum, Wall., Ins. 3fad. 73 (1854). 



, Id., Cat. Mad. Col. 22 (1857). 



Tachys bistriatus, Schaiim, Nat. der Ins. Deutsch. i. 746 (1860). 



Habitat Gomeram, a cl. "W. D. Crotch nuperrime detectus. 



Two specimens which I cannot separate from the European T. 

 bistriatus (though at the same time, instead of being piceous -brown, 

 they are testaceous with the head alone dark — thus agreeing, appa- 

 rently, with the 2xde variety recorded by M. Duval and by Schaum) 

 were taken by Dr. Crotch, during the spring of 1862, in Gomera. 

 One of these he has presented to the collection at the British Museum. 

 The species (though in its normal state, as regards colour) occurs also 

 in the intermediate elevations of Madeira. 



101. Tachys scutellaris. 



Trechiis scutellaris, Germ., Thon, Ent. Archiv, ii. fasc. i. 11 (1829). 

 Tachys scutellaris, Steph., III. Brit. Ent. ii. 5 (1829). 

 Bembidium scutellare, Dej., Spec. Gen. des Col. v. 39 (1831). 

 Tachys scutellaris, Scliaum, Nat. der Ins. Deutscli. i. 745 (1860). 



Habitat in salinis Lanzarotse, vulgaris. 



The European T. sctitellaris appears to be common in one or two 

 salt spots in Lanzarote. On the muddy surface of the Salinas, or 



* In my ' Ins. Mad.' I had noticed tliis in a particular species and regarded 

 it as a specific character (calling the insect by the trivial name of curvimanus) ; 

 but in reality it is a generic one. 



