INSECTA MADERENSIA. 327 



(which, during the short period of its colonization, were once sparingly cultivated 

 towards the southern extremity of the island) from Madcu'a. 



250. Ceutorhynchus nigroterminatus, WoU. 



C. niger, parce albo-squamosus, subrugulosus, protliorace canaliculato, elytris obtriangulari-quaclratis 

 abbreviatis obscure albo-iiToratis, macula subscutellari et margine postico albidioribus, pedibus 

 albo-irroratis, tarsis rufo-testaceis articulo ultimo nigro-terminato, antennis nigricantibus. 



Long. Corp. lin.'ll-li. 



Habitat Maderam borealem, in castanetis Sanctse Annse mense Maio a.d. 1850 a mcipso i-epertus. 



C. black, densely clothed beneath with yellowish-white, and above sparingly besprinkled with white, 

 scales ; somewhat rugulose. Head slightly keeled behind. Pruthorax with a wide and deep 

 dorsal channel behind, which is almost obsolete anteriorly, with a rather small but prominent 

 tubercle on either side of its disk, and with its front margin very slightly elevated. Elytra 

 obtriangular-quadrate, somewhat short, and very much abbreviated at the apex; with a very 

 obscure patch at the base of the suture (immediately behind the scutellum), together with the 

 extreme hinder margin, more densely clothed than the rest of the surface with white scales. 

 Legs sparingly clothed with white scales or hairs : femora with a tolerably distinct spine beneath, 

 that on the anterior pair however being the smallest : tibice straight, just perceptibly rufescent at 

 their extreme base : tarsi rufo-testaceous, with the extreme tip of their terminal joint black. 

 Antennce dark piceous, with their club nearly black. 



A very distinct and interesting Ceutorhynchus, readily known by its somewhat 

 shortened outline, suhrugulose surface, considerably abbreviated elytra (which 

 have not only an obscure patch about the scutellum, but likewise then- hinder 

 margm more or less densely clothed with white scales), by its comparatively dark 

 antenniB, and by the apical joint of all its tarsi being tipped with black. It is 

 exceedingly rare, and confined, so far as I have hitherto observed, to the north of 

 the island, — the only two examples which I have seen having been captured by 

 myself, during May 1850, in the chestnut- woods of Santa Anna. 



251. Ceutorhynchus lineatotesseUatus, Woll. 

 C. fusco-niger convexus fusco-squamosus, prothorace profunde canaliculato, elytris rotundato-qua- 



dratis subventricosis fere integris, longitudinahter lineato-tessellatis, pedibus fusco-ferrugineis et 



obscure albo-annulatis. 

 Long. Corp. lin. If -2. 



Habitat in graminosis IMaderse sylvaticse, rarissimus : duo specimina hactenus vidi, unum sc. prope 

 summam originem convallis Ribeiro de Santa Luzia dictfe tempore vernali a.d. 1849, et alteram 

 ad Ribeiro Frio mense Augusto ineunte a.d. 1850, a meipso detecta. 



C. brownish-black, clothed beneath with yellowish-white, and above with dark fuscous, scales ; convex. 

 Head not perceptibly keeled. Prothurax with a very wide and deep dorsal channel, extending to 



