302 CANAPvIAN COLEOPTERA. 



sprinkled with a few very obscurely whiter ones. Its elytra have a 

 tencUnaj to be marked with a very obsolete oblique line, or patch, 

 extenduig from about the disc of each to (and becoming gradually 

 wider at) the hinder portion of the suture — an arrangement which 

 causes the scutellary region which it encloses to apjicar as though 

 formed of somewhat paler scales. The species is decidedly rare, 

 though widely spread over the group. I have taken it at Haria, in 

 Lanzarote ; in Grand Canary ; and near S''' Cruz, in TenerifFe : and 

 it was captured by Mr. Gray in Fuerteventura. 



Genus 195. TYCHIUS. 

 (Germar) Schcin., Cure. Disj). Meth. 245 (182G). 



480. TycMus aridicola, n. sp. 



T. fusco-piceus, squamis subflavescenti-cinereis dense nebulosus; pro- 

 thorace transverse, densissime 2)unctato, ad latera rotundato ; ely- 

 tris cylindrico-oblongis, profunde crenato-striatis, interstitiis mi- 

 nutissime punctulatis ; rostro antennisque rufo-piceis, illo lineari, 

 tereti, arcuato, longitudinahter punctato-sulcato ; pedibus robustis ; 

 ocuHs magnis, reniformibus. — Long. corp. liu. 2-2|. 



Habitat in calcariis Lanzarotte, Fuerteventurae et Canaria^, rarissi- 

 mus. 



Although the present gigantic Ti/chius is so nearly allied to the 

 Madeiran T. robustus that, prima facie, I had regarded it as actually 

 identical with that insect, nevertheless a closer inspection has dis- 

 closed so many small differences (one of them even structural) that 

 I believe it must be treated as specifically distinct. It differs mainly 

 in its elytra being less inflated and convex, or more cylindric (the 

 sides being considerably straigliter), and in its feet being rather nar- 

 rower — the bilobed third joint being perceptibly less dilated. Its 

 scales, also, are whiter and more cinereous, or with less of a yellowish 

 tinge. It appears to be exceedingly rare, and confined (so far as I 

 have observed hitherto) to calcareoixs spots in Lanzarote, Fuerteven- 

 tura, and Grand Canary. In the first of these I have taken it, from 

 beneath stones, on the arid mountain-slopes between Los Valles (de 

 S'''' Catalina) and San Miguel deTeguise ; in the second, in a similar 

 locality, close to the little town of S''^ Maria Betaneuria ; and, in the 

 third, on the low sandy isthmus between Las Palmas and Puerto da 

 Luz. 



481. Tychius decoratus. 

 T. niger ; rostro (antice, pra}sertim in fa3mineis, sensim attenuate) ad 



apiccm riifo-piceo nitido calvo, pone antennas densissime punctu- 



lato et nigro-squamoso, in fronte albido-squamoso; prothorace den- 



