INSECTA MADERENSIA. 475 



Madeiran specimens are more deeply punctured than their representatives from 

 higher latitudes, — with which in all other respects however they exactly coincide. 



Genus 157. ARTHROLIPS, Woll. (Tab. X. fig. 6.) 



Corpus minutissimum, ovatum antice subacuminatum, pubescens, subconvexum : prothorace minore 

 (vix semf-ovato), ad basin elytrorum latitudine, angulis posticis subrectis, ad latera et (prsesertim) 

 antice valde subrecui-vo-producto (caput omnino tegeute) : elytris apice truncatis (angulis sutu- 

 ralibus rotundatis) : alis (X. 6^) amplissimis ciliatis. Antenna (X. 6 «) protborace breviores, 

 lO-articulatae, clavatfe, articulis primo et secundo (illo prfecipue) elongatis robustis, inde ad 

 sextum gracilibus latitudine sequalibus (tertio elongate, reliquis brevissimis transversis), septimo 

 paulo majore, reliquis clavam magnam elongatam laxam perfoliatam triarticulatani efficientibus 

 (octavo subovato apice tnmcato, nono vix breviore transverso, decimo paulo longiore ovali). 

 Instrument a cibaria fere ut in genere prpecedenti, sei labritm (X. 6 b) antice integrum; mandibuhe 

 (X. 6 c) et maxillce (X. 6 d) ad apicem fortius denticulatse {illis intus profunde sinuatis et mem- 

 brana ampliore instructis) ; palpi labiaJes articulo secundo majore crassiore ; et ligula ampla, 

 ad apicem recte truncata et minus robusta. Pedes (X. 6/) paulo breviores : tibiis apice (nisi 

 fallor) ecalcaratis : tarsis articulo tertio minutiore, quarto fortius clavato et unguiculis majoribus 

 munito. 



Ab apdpov artus, et XeiTTo) relinquo. 



The insect for which I have proposed the name of Arthrolips is referred by 

 M. Redtenbacher to Gryphimis (i. e. Sericodenis of Stephens, — the correct title as 

 regards priority) ; but it appears to me to constitute an exceedingly well-marked 

 genus between it and Clypeaster, partaking ahnost equally of the structiu-al 

 characteristics of them both, though in general affinity approaching the second 

 more than the first. It is true that its 10-articulated antennse might of them- 

 selves incline us to associate it with Sericodenis ; yet it entirely wants the largely- 

 developed prothorax, with the greatly-produced hinder angles, which are there so 

 conspicuous, — whilst in its habits, contour, coloviring and texture it approximates 

 so much nearer to Clypeaster, that I cannot but believe it to be unnatural to force 

 its union, on account of the reduction of its antennal joints, with the former (from 

 which in so many of its primary featui-es it altogether recedes) : and hence, if it 

 must be appended to either, I would rather widen the definitions of the latter, 

 so as to allow of its admission there, than consent to the other alternative. In real 

 fact however it seems to offer discrepancies abundantly sufficient to warrant its 

 isolation from them both, — since the modifications of its antennse and mouth as 

 much forbid its junction with. Clypeaster as its outward structure and aspect do 

 with Sericoderns. 



The trophi of most of the Corylopliidce are moulded on nearly the same plan ; 

 and indeed, were this not so, their microscopic dimensions would entkely preclude 

 the employment of them for practical purposes, — and hence it becomes doubly 

 necessary that the external characters at any rate should be so far apparent as to 

 be at once appreciable for ordinary investigation. Tortunately this is the case 



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