C^NARIAN COLEOPTERA. 107 



however it may be known by being, on the average, slightly larger, 

 relatively broader in outline (it being very distinctly wider at the 

 junction of its prothorax and elytra), by the disc of its pronotum 

 being darker (the edges alone being testaceous), by its suture also 

 being conspicuously darkened, and by its striae being more evident. 

 I have taken it in Grand Canary, Teneriffe, Palma, and Hierro ; and 

 there can be Kttle doubt that it must occur in Gomera also : but in 

 Lanzarote and Fuerteventura I believe that it does not exist. In- 

 deed it becomes gradually more abundant as we approach the western 

 portion of the archipelago, being (so far as I have observed hitherto) 

 rare in Grand Canary, sparingly distributed in Teneriife (where it 

 was found likewise by Dr. Crotch), tolerably common in Palma, and 

 absolutely teeming in Hierro, — where, during February 1858, I 

 captured it on various flowers (particularly those of a large and pale 

 Cineraria) in several parts of the island, though especially aroimd 

 Valverde. In this last locality it was found likewise by Mr. Gray. 



177. Olibrus congener, n. sp. 



0. ovalis, subsenescenti-piceo-niger, nitidissimus ; elytris fere simpli- 

 cibus (postice versus suturam striis obsoletissimis vix impressis) ; 

 antennis pedibusque longiusculis, testaceis. — Long. corp. lin. |-1. 



Habitat Lanzarotam, circa oppidum Haria ad flores baud infrequens. 



The present Olibrus may be known from the following one by its 

 rather larger size, less shortened outline, just perceptibly subpicescent 

 hue, by its elytra being (if possible) even still more obsoletely stri- 

 ated, and by its limbs being longer and paler. It has a good deal 

 the appearance, at first sight, of the 0. liqiiidus of Erichson, which 

 abounds in Madeira ; but is less acuminated and almost concolorous 

 (instead of being rufescent) posteriorly, its outline is relatively some- 

 what broader, its elytral striae are still more faint (being scarcely 

 traceable), and its entire surface is a little more brassy. Hitherto 

 I have observed it only in Lanzarote, towards the north of which 

 island, however, it is far from uncommon ; Avhere, moreover, it was 

 likewise taken by Mr. Gray and M. Hartung. 



178. Olibrus subaereus, n. sp. 



0. breviter ovalis, senescenti-niger, nitidissimus ; elytris obsolete sub- 

 striatis ; antennis pedibusque breviusculis, plus minus clarc piceo- 

 testaceis. — Long. corp. lin. f-vix -|. 



Habitat in Canaria et Hierro, super flores varios, rarior. 



The small size and short-oval outline of this Olibrus, combined 



