286 



CURCULIONID^E. 



central parts of the Canarian Group at low and intermediate ele- 

 vations. It has been captured in Lanzarote, Fuerteventura, Grand 

 Canary, and Teneriffe. 



Genus 247. TYCHIUS. 

 (Germar) Schon., Cure. Disp. Meth. 245 (1826). 



791. Tychius robustus. 



Tychius robustus, WolL, Ins. Mad. 344 (1854). 

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



Habitat Maderenses (ins. omnes), sub lapidibus in aridis pra3cipue in 

 apricis inferioribus occurrens. 



This large Tychius is universal throughout the Madeiran Group 

 in the whole five islands of which I have myself taken it except in 

 Madeira proper, where, however, it was found (011 the Sao Lourengo 

 promontory) by the late Mr. Bewicke. It occurs principally in low 

 and arid spots, whether sandy or calcareous, and is more abundant 

 in Porto Santo and on the northern Deserta than elsewhere. 



792. Tychius aridicola. 

 Tychius aridicola, WoU., Cat. Can. Col. 302 (1864). 



Habitat Canarienses (Lanz., Fuert., Can.) ; sub lapidibus in aridis, 

 vel calcariis vel arenosis, parce degens. 



It is difficult to believe that this immense Tychius is more than a 

 Canarian modification of the preceding one being found in pre- 

 cisely the same sort of places, and being so like it at first sight that 

 it might well be mistaken for it. It seems to differ from the robustus, 

 principally, in its elytra being less inflated and convex (or straighter 

 and more cylindrical), in its feet being a little narrower (the bilobed 

 third joint being appreciably less expanded), and in its scales being 

 whiter or more cinereous. 



The T. aridicola I have taken in Lanzarote, Fuerteventura, and 

 Grand Canary, namely, on the dry mountain -slopes between San 

 Miguel de Teguise and Los Valles de S ta Catalina, of the first ; near 

 S ta Maria Betancuria, of the second ; and between Las Palmas and 

 the Isleta, of the third. 



793. Tychius decoratus. 



Tychius decoratus, Rosenh., Die Thier. Andalus. 271 (1856). 

 1 Woll, Cat. Can. Col. 302 (1864). 



Habitat C&nanQnses (CVin.),foliis Ononis mrim,L.,pra3cipuegaudens. 



