246 INSECTA MADERENSIA. 



(et ab illis remotse) insertse, articulo primo leviter robusto clavato, reliquis (secundo breviusculo 

 et ultimo ovali exceptis) subsequalibus. Lubrum vix coriaceum, limbo merabranaceo, transverso- 

 subquadratum, antice rotundatum. Mandibulte magUK corncfe longiuscuhe, apicem versus 

 acutissimee bifida, intus membrana angusta tenuissim^ auctse. Maxilla (IV. 9 b) bilobse, apice 

 leviter pubescentes : lobo externa basi angusto subcoriacco, apice subito dilatato submembranaceo : 

 inferno breviorc, omnino submembranaceo. Paljji filiformes, breviuseuli vel elongati ; maxillares 

 articulo primo parvo, secundo et tertio crassioribus suba?qualibus (mode, ut in P. Maderensi, 

 brevibus; modo, ut in P. rostrato et i-ugoso, longiusculis), ultimo elongate fusifornii sub- 

 acuminato ad apicom ipsum vix truncato; labiahs (IV. 9 c) conici crassi, articulis primo et 

 secundo latitudine sub.-equalibus (illo brevi lato, hoc paulo longiore), ultimo augustiore longiusculo 

 subfusifomii-conico ad apicem ipsum truncato. Mentum (ut mihi vidctur) veluti e duplici parte 

 formatum, alia terminali magna (subquadratii ad latera rotundata) coriacea antice membranacea, 

 aliil basali (prioris stipite) cornea apice subcoriacea (transverso-subquadratu ad latera in angulum 

 medium producta pilisquc duobus longissiniis instructii). Ligula clongata membranacea pilosa, 

 apice truncata. Pedes elongati graciles : tibiis cylindricis : tarsis (IV. 9 d) articulis quatuor 

 baseos subtus leviter oblique productis (primo et secundo ajqualibus, tertio vix breviore, quarto 

 brevi), anticis in maribus (IV. 7 a, et 9e) articulo secundo in lobum elongatissimum concavum 

 subgaleiformcm apice subito incur\'um (introrsum plus minusve valde nigro-setoso-pectinatum) 

 supra-producto, quinto (in omnibus atque in utroque sexu) elongato valde clavato, apice mem- 

 bran^ tenuissima biloba unffuiculisque majoribus validis muuito. 



A TreKrrjp pectinator, et iroOv pes. (Tj-pus — P. Maderensis.) 



A very interesting and well-marked genus, being one moreover of the most truly 

 indigenous and characteristic throughout the Madeiran Coleoptera. Apart from 

 the metallic lustre of the insects which compose it, it may be readOy known from 

 the allied forms, as indeed from every other Avith which T am acquainted, by the 

 very peculiarly constructed second joint of its anterior male tarsi, which is oblique 

 in an opposite direction to the remainder, being produced on the upj^er side into 

 an extremely elongated, subgaleiform or concave process, Avhich is deflected, and 

 strongly pectinated within with dark and powerful bristles, which are more or less 

 numerous in each of the species hitherto discovered, — remaining constant, in one 

 case (P. 7'iigosus) to the extreme apex only, in another (P. rostratiis) to the apex 

 and a small portion of the sides, whilst in a third (the P. Maderensis, which I should 

 regard as the tj^ie) they fringe the terminal and lateral margins along very nearly 

 theii' entire distance. All three representatives moreover difi'er a little in the relative 

 proportions (the length especially) of then' head, cl}7)eus and palpi, — which, being 

 structural points, have rendered it convenient to arrange them under separate sec- 

 tions. Yet, retaining as they do all essential characters in common, and, more par- 

 ticularly, preserving unimpaired the feature which is so remarkable in theii- anterior 

 male feet (the modifications in the number of the inner bristles, and the breadth of 

 the lobe, being of course merely specific), it is impossible to regard them in any 

 other light than as members of a single (and perhaps geographical*) group. 



* Belonging evidently to the present genus (though I have not been able to procure a male specimen, 

 and therefore to examine the anterior tarsi of that sex) is a very interesting and distinct species, detected 



