Mr. T. V. Wollaston on Additions to Madeiran Coleoptera. 255 



subsequalibus (illo subflexuoso, hoc paulo crassiore subclavato), 

 ultimo magno (ut in palpis maxillaribus). Mentum magnum trans- 

 verso-quadratum, antice vix angustatum. Ligula magna sat robusta 

 subquadrata, apice integra ciliata. Pedes validi subcontractiles, basi 

 vix distantes : femoribus apicem versus subclavatis : tibiis bicalcara- 

 tis, extus (prsesertim anticis) irregulariter erosis, aut potius subser- 

 ratis : tarsis 4-articulatis,'articulis tribus baseos inter se subsequalibus, 

 4 to valde elongate flexuoso subclavato, unguiculis simplicibus munito. 

 A Trpos et n'0/7ju<, [sc. faunae] accessio. 



The small insect from which the above characters have been 

 drawn is hitherto unique ; nevertheless, I have fortunately suc- 

 ceeded, in my dissection of it, in securing all the parts of its 

 mouth, so that I can have no hesitation as to its affinities. Its 

 entire structure and quadriarticulate feet leave no doubt what- 

 soever, on my mind, that it is rightly referred to the Colydiada ; 

 and I believe that its nearest allies are the European genera 

 Pycnomerus and Xylolamus. Indeed with the former of these it 

 has so much in common that I at first thought it might be almost 

 associated with it ; nevertheless, its more abruptly clavated an- 

 tennae and different mandibles (which are entire at the apex, and 

 without the deep incision towards their base behind), in con- 

 junction with its much squarer (or more angulated) labrum, 

 mentum, and ligula, will, apart from minor points, prevent its 

 fusion into Pycnomerus ; whilst from Xylolamus (which it much 

 resembles in its trapeziform, margined, and laterally crenulated 

 prothorax), its undentated mandibles, and the somewhat diffe- 

 rently proportioned joints of its antennae and palpi will (as I 

 judge from the description), inter alm y readily separate it. 



Prostheca aspera, n. sp. 



P. linearis, fusco-ferruginea subopaca ; capite prothoraceque rugosis, 

 tuberculatis et setuhs paucis valde distantibus obsitis ; hoc fere 

 sequali, postice angustiore, ad latera oblique recto, angulis anticis 

 porrectis paulo explanatis subrecurvis ; elytris obsoletissime sub- 

 seriatim punctatis, interstitiis subcrenato-costatis et setulis longi- 

 tudinaliter obsitis ; antennis pedibusque vix pallidioribus. 

 Long. corp. lin. 1. 

 Habitat Maderam, a Dom. Bewicke nuper communicata. 



P. narrow, linear, elongate, dull brownish-ferruginous, and 

 nearly opake. Head and prothorax much roughened, and beset 

 with large but not very elevated tubercles, sprinkled with short 

 remote setae: the former subquadrate; the latter elongated, 

 slightly narrowed behind, with the sides nearly straight (but 

 oblique) and margined, and with the anterior angles thickened, 

 porrected, and slightly recurved. Elytra with very shallow, and 

 almost obsolete, punctures arranged in longitudinal rows, and 



