446 CANAKTAN COLEOPTERA. 



asperatis ct irrcgulariter dispcrsis) ; antennis tarsisqiie sensim ob- 

 scurioribus. — Long. corp. lin. i^g-3. 



Habitat Lanzarotam et Fuerteventuram ; in hac hand infrequens, 

 una cum A. subcUiato in arenosis fodiens ; sed ab ilia exemplar unum 

 (a meipso captum) adhuc vidi. 



The A. costiffons is a Fuerteventuran species, and appears, like 

 the A. subciliatus (with which it is found in company), to be of sand- 

 burrowing propensities ; nevertheless it is not pilose at the edges of 

 its body. Although small, it is a little larger, as well as more oblong 

 and less convex, than that insect ; its surface is more opake ; its 

 frontal keel (which is equally elevated) is considerably curved, instead 

 of being straight ; its head and prothorax (the latter of which is 

 narrowly margined at the sides, but immarginatc in front) are much 

 more densely and finely punctured, wdiilst the punctules of its elytra 

 are excessively diminutive and distant (being, also, irregularly dis- 

 persed) ; and its epipleiu-al costa (instead of being obsolete) is de- 

 veloped, though not much incrassated. Its epistome appears at first 

 sight to be simply emarginated at the apex ; but when viewed 

 beneath a very powerful glass it will be seen to be most minutely 

 trisinuated, so as to shape out four points, the two inner ones of which 

 are barely traceable and sometimes quite obsolete. The A. eostifrons 

 seems to occur also in Lanzarote, a single example now before me 

 having been taken by myself in that island. 



681. Arthrodes malleatus, n. sp. 



Yl.pra3cedenti (A.costifronti) similis, sed pavilo major, oblongior; capite 

 prothoraceque \'ix profundius punctatis, hoc ad latera vix evdden- 

 tius marginato ; elytris multo magis malleatis punctidis(pie (irrc- 

 gulariter dispositis, i. e. in lacunis solis sitis) sensim majoribus ; 

 pedibus paulo minus graciUbus, tibiarum anticarum spinis duabus 

 magis obtusis, apicali minus curvata. — Long. corp. lin. 2-3^. 



Habitat Lanzarotam, sub lapidibus in intcrmediis degens. 



Although closely allied to the eostifrons, this Arthrodes is certainly 

 distinct from it ; occurring, apparently, in the intermediate districts 

 of Lanzarote, where it was taken by Mr. Gray and myself, during 

 the winter of 1858, in the extreme north of that island ; and by my- 

 self, during the spring of the following year, in the little adjacent 

 island of Graciosa. It difters from the eostifrons, mainly, in being a 

 little larger and more oblong ; in its elytra being considerably more 

 uneven, or much malleated, and in having their punctures (which are 

 collected into merely the depressions, leaving the more elevated parts 

 of the surface almost free from sculpture) a good deal lai'ger ; and 



