APPENDIX. 7 



basal joint of its antennae being almost (or entirely) of the same 

 colour as the remaining ones, and (above all) by the peculiarity of 

 its marginal rim both in the prothorax and elytra, it being con- 

 tinued (completely and coarsely) in the former to the actual basal 

 angles themselves, and in the latter to the humeral angles (where it 

 abruptly terminates, causing them to be comparatively acute and 

 thickened). Its habits would seem to be more in accordance with 

 those of the B. rutilans than of the B. glaber, the few specimens 

 from which the present diagnosis has been compiled, and which were 

 detected by the Messrs. Crotch, having been found in the sylvan 

 districts of Gomera " at the foot of the cataract above Hermigua." 



Genus ZARGTJS. 

 WoUaston ; Ins. Mad. 22 (1854). 



Zargus Crotchianus, n. sp. 



L. niger vel piceo-niger, obsoletissime submetallico-tinctus, nitidus ; 

 prothorace sat parvo, subrotundato-quadrato, ad latera subpellu- 

 cido-dilutiore et postice late recurvo, basi utrinque late profun- 

 deque impresso; elytris regulariter striatis (striis impunctatis), 

 in limbo interdum subdilutioribus ; antennis palpisque elongatis, 

 gracilibus, piceo-testaceis, illis in articulis 3 basalibus plus minus 

 picescentioribus ; pedibus elongatis, gracilibus, piceis vel testaceo- 

 piceis, tarsis clarioribus. Long. corp. lin. 5-5^. 



Habitat Gomeram, rarissimus; in lauretis humidis excelsis supra 

 "Hermigua" a DD. Crotch deprehensus. 



This noble Zargus constitutes one of the finest and most important 

 discoveries of the Messrs. Crotch, not merely from its specific dis- 

 tinctness, but as introducing the remarkable genus of which it is a 

 member (and which has hitherto been essentially Madeiran) into the 

 Canarian fauna. Three examples of it were taken by them at a high 

 elevation (above Hermigua) in the laurel-districts of Gomera, during 

 the summer of 1864 ; and they seem to possess all the structural 

 features of the normal Zargi, unless it be that the terminal joint of 

 their palpi is just perceptibly thicker (or less acute). Apart from 

 every other character, the Z. Crotchianus may be known from all the 

 (Madeiran) species as yet detected by its large size, obscure sub- 

 metallic tint, and the broadly recurved edges of its prothorax ; and 

 it may perhaps be considered, on the whole, nearer to the (compara- 

 tively small) Z. Monizii (found near the Cabo Garajao, in the east of 

 Madeira proper) than to any of the remainder. 



