CANARIAN COLEOPTERA. 41 



Crotch and S. T. Nicholls, Esq., who, during an expedition to these 

 islands in the spring of 1862, obtained a few examples of it, at a 

 high elevation, both in Teneriffe and Gomera, — namely, above Ycod 

 el Alto of the former, and " on the slope below the laurel-region 

 above Hermigua" of the latter. It is one of the most interesting 

 and important of their discoveries ; and I have much pleasure in 

 dedicating the species to S. T. Nicholls, Esq., as an acknowledgment 

 of his services in the cause of entomology, in conjunction with those 

 of his indefatigable companion Dr. Crotch. 



67. Anchomenus debilis, n. sp. 

 A. praecedenti similis sed vix minor, obscurior ; prothorace paulo 

 breviore, utrinque versus angulos posticos sensim minus recto, 

 basi fere impunctato ; elytris magis ovatis (nee ovalibus), i. e. 

 utrinque in medio parum subito ampliatis, vix opacioribus et 

 levius (sc. levissime) striatis, in limbo subconcoloribus, Knea ba- 

 sali minus curvata et minus clevata ; antennis pedibusque sensim 

 brevioribus, obscurioribus, illarum articulis basalibus (sed pra3-- 

 sertim subbasalibus) conspicue obscurioribus. — Long. corp. lin. 



Habitat Canariam Grandem, inter lapOlos per marginem cujusdam 

 rivuli juxta oppidum Teror mense Aprili a.d. 1858 parce captus. 



It is barely possible that the present Ancliomenus may be an 

 insular modification of the preceding one ; but I do not think that 

 such is the case, and certainly it would be very unsafe to treat it as 

 such, — seeing that the A. Nichollsii occurs in tiuo different islands, 

 without any appreciable variation. The A, debilis is a trifle smaller 

 than its ally, and has its limbs a little obseiu'er and more abbreviated, 

 — the antennae moreover having their basal (though more especially 

 their subbasal) joints conspicuously darkened ; its prothorax is some- 

 what shorter, having its sides less rectangular (or more oblique) 

 posteriorly, and is nearly impunctate at the base ; and its elytra are 

 more ovate (or less regularly oval), being rather suddenly rounded 

 about the middle, just perceptibly opaker, still more lightly striated, 

 mth their margin scarcely paler than the rest of the surface, and 

 with their basal rim (between either shoulder and the scutellum) 

 both less elevated and less curved. 



The A. debilis appears to be of the greatest rarity, — the only spe- 

 cimens which I have seen (twelve in number) having been captured 

 by myself from under small stones at the edges of a little stream 

 immediately outside the town of Teror, in Grand Canary, diuing 

 April 1858. 



