CANARIAN COLEOPTERA. 445 



Mr. Gray and myself about a mile to the south of Puerto de Cabras, 

 in January 1858 ; and by myself, during the spring of the following 

 year, in the arid district of Corralejo, at the extreme north of that 

 island. 



679. Arthrodes subcostatus. 



A. praecedenti similis, sed plerumque paulo minor et scnsim minus 

 convexus, punctura omnino densioro et snbfortiore sed elytris sin- 

 gulis in lineis duabus vel tribus valde irrcgularibus indistinctis lon- 

 gitudinalibus lajvioribns sensim minus punctatis ; capite vix angus- 

 tiore ; prothorace immarginato, angulis anticis paulo magis por- 

 rcctis. — Long. corp. lin. 2-2|. 



Erodius (Arthrodeis) subcostatus, BrulU, in Webb et Berth. (Col.) 04 

 (1838). 



Habitat Canariam Grandem, in locis similibus ac prascedens, in ari- 

 dis arenosis juxta urbem Las Palmas deprehensus. 



The present Arthrodes is very closely allied to the preceding one, 

 and is apparently peculiar to Grand Canary, residing in much the 

 same sort of localities — at the roots of sand -plants, where it burrows 

 into the loose drifting sand. In such situations I took it, between 

 Las Palmas and the Puerto da Luz, during the spring of 1 858. It 

 agrees with the A. suhciliatus in its general outline and structure, as 

 well as in its laterally-pilose body, rather slender, elongate limbs, 

 and the greatly produced spines of its anterior tibiae ; but differs from 

 it in being, on the average, a trifle smaller and less convex, in its 

 punctation being altogether a little denser and perhaps somewhat 

 coarser, but with two or three obscure ill-dejined lines (or spaces) 

 down each of its elytra, which are comparatively glabrous (or free 

 from sculpture), by its head being perceptibly narrower, and by its 

 prothorax being destitute of even an obscure margin along its ante- 

 rior edge, and with its front angles a little more porrect. Having ex- 

 amined M. Brulle's types, I am enabled to state for certain that the 

 species is correctly identified. 



b. Epijpleuroe plica humeralis distincta (sed vix ad medium ducta). 

 680. Arthrodes costifrons, n. sp. 



A. afRnis A. subciliato, sed paulo major, oblongior, minus convexus, 

 minus nitidus et in limbo calvus (nee ciliatus) ; carina frontali ut 

 in hoc valde elevata sed curvata (nee recta) ; epistomate antice fere 

 simpliciter emarginato sed sub lente fortissima minutissime trisi- 

 nuato (quasi dentes 4, internos obsoletissimos, efficiente) ; protho- 

 race ad latera sensim (sed antice baud) marginato, una cum capite 

 densius (sc. dcnsissime) et subtilius punctato ; elytris subgrossius 

 maUeatis sed multo subtilius parciusque punctulatis (punctulis baud 



