146 Mr. T. Veinon Wollaston on ilie Eziphorhia-infesting 



tliat it must exist there also. Perhaps the main reason why I 

 did not observe it during our short stay in that island is, that I 

 had merely an opportunity of examining the rotten branches of 

 the E. canariensis ; whereas it is principally in the decayed wood 

 of the other Euphorbias that it subsists : nevertheless I took a 

 nearly-allied species (described below) out of the E. canariensis in 

 Gomera. It does not often attach itself to the E. canariensis ; 

 though in most of the other Euphorbias it is extremely common, 

 occurring (independently of elevation) wherever the plants pre- 

 sent themselves. It may be readily known from the E. duplicatus 

 hy (inter alia) its slightly narrower, less shining, and longiiudinally- 

 imjyressed prothorax (which has its large punctures scattered 

 irregularly about, instead of being gathered into a double series 

 on the disc), by its rather less deeply striated and posteriorly- 

 subattenuated elytra, and by its usually broader and darker 

 pygidium. 



5. Europs duplicatus * n. sp. 



E. angustus, subcylindrico-linearis, nitidus et parcissime pu- 

 bescens ; capite prothoraceque pallide rufo-ferrugineis, pro- 

 funde et remote punctatis, hoc subquadrato, convexo, integro, 

 nitidissimo, punctis discalibus in seriebus duabus dispositis ; 

 elytris subparallelis, sat profunde punctato-striatis, pallido- 

 testaceis, sed ad apicem nigro-infuscatis ; pygidio triangulari, 

 rufescente ; pedibus testaceis. 



Long. corp. lin. 1 — vix 1^. 



Habitat ins. Gomera, in ramis putridis Euphorbice canariensis 

 in montibus supra San Sebastian crescentis, Februario ineunte 

 A.B. 1858 a meipso detectus. 



The distinctions between the E. duplicatus and impressicollis 

 may be gathered readily both from the diagnosis and the obser- 

 vations given above. I may however just add, that its more 

 shining, entire, and slightly broader prothorax (which has its 

 discal punctures gathered into a double longitudinal-row), in con- 

 junction with its somewhat more glabrous surface, more deeply 

 punctured and more parallel elytra (the posterior portion only of 

 wliich is generally dark, — the suture and scutellary region being 

 almost invariably pale), and its slightly narrower and more rufous 

 pygidium, will at once abundantly characterize it. The only 

 spot in which I have hitherto observed it is in the island of 

 Gomera, — where, during my short sojourn there, with Mr. Gray 

 and the Rev. R. T. Lowe, at the beginning of February, 1858, 



