34 APPENDIX. 



Taken by the Messrs. Crotch in Gomera and Hierro, during the 

 summer of 1864. The state, however, which I have regarded as the 

 typical one belongs to the former of those islands, the examples 

 from Hierro (var /3. rotundata) having their elytra just perceptibly 

 more rounded outwards (or less falling away) at the shoulders, their 

 prothorax still more densely but less coarsely scabrose (which how- 

 ever can only be perceived when the pubescence is removed) and 

 more evidently channelled behind, and their antennal joints a trifle 

 shorter and less developed. But in spite of these differences (which, 

 after all, are very slight), I do not believe that the Hierro insect can 

 be considered more than an insular phasis of the Gomeran one. 



Both the Gomeran and Hierro specimens of the Sphcericus are 

 abundantly distinct from all the other species of the Canarian group, 

 their rounded and coarsely striate-punctate elytra, which are ob- 

 scurely marbled transversely with cinereous scales (though seldom 

 much fasciated behind) being sufficient, even alone, to separate it 

 from its allies. 



Fam. ANOBIADJE. 



Genus XYLETINUS. 

 Latreille, Rtyn. An, (ed. 2) iv. 483 (1829). 



Xyletinus flavicollis, n. sp. 



X. rufo-brunneus prothorace flavescentiore, nitidus, minutissimc 

 (oculo fortissime armato) punctulatus ac pube demissa subcinerea 

 tectus ; antennis pallide brunneus, basi dilutioribus ; pedibus pal- 

 lide testaceis. Long. corp. lin. 1. 



Habitat Gomeram, in caulibus EwpTiorbice canariensis a DD. Crotch 

 lectus. 



The discovery of this very minute and interesting Xyletinus, which 

 is remarkable for its prothorax being of a more or less distinct yel- 

 lowish tint, is due to the researches of the Messrs. Crotch who met 

 with it rather commonly in Gomera, within the decayed stalks of the 

 Euphorbia canariensis. The last joint of its maxillary palpi is only 

 feebly securiform, and without any tendency to be excaved along its 

 inner apical edge ; and in this respect, therefore, it is more in ac- 

 cordance with the normal Xyletini than any of the following species. 

 Nevertheless, as stated in my observations under the genus Xyletinus., 

 the scooping- out of the terminal articulation is a character which 

 varies so much according to the species (and even, as I believe, 



