INSECTA MADERENSIA. 285 



cornese validse latje subtriangulares, apice acutse bidentatse. Maxilla bilobse, lobis submem- 

 branaceis apice pubescentibus ; externa magno lato, apice truncato ; intemo brevissimo minuto. 

 Palpi subclavati; maxillares articulo primo longiusculo subgracili, secundo leviter elougato 

 subclavato, tertio breviore (primi longitudine), ultimo elongato robusto fusiformi apice aciiminato ; 

 labiales longissimi, articulo prinio parvo, secundo longissimo subflexuoso clavato, ultimo vix 

 breviore robusto fusiformi apice subacuminato. Mentum corneum transversum, antice bilobuni. 

 Ligula membranacea cordata, apice pilosa. Pedes breviusculi graciles : tibiis anterioribus {anticis 

 prsecipue) extus minutissime subserratis necnon ad apicem externum in angulum leviter exstantem 

 subdentiformem productis : tarsis articulis primo et secundo elongatis, tertio, quarto et quinto 

 brevibus (tertio et quarto subtus leviter oblique productis, quinto crasso paulo longiore clavato). 



Ptllimts may be readily known botli by external and structural characters, — 

 the narrow cylindi-ical bodies and globose prothoraces of the species which com- 

 pose it, in conjunction with the two elongated basal, and the three abbreviated 

 remaining, joints of theu* feet, and the singular flabeUated antennae of the male 

 sex, being at once suflS.cient to distinguish it from its allies. Although easily 

 recognised however as a genus, it is one of rather doubtful position in a general 

 arrangement, since in the modification of its antennae and tarsi it altogether 

 recedes from the present family, and has more in common with the Ptinidce. 

 Still, in its apically bidentate mandibles, in the excessive minuteness of the inner 

 lobe of its maxillae, and in its almost simple tibia? it agrees unquestionably with 

 Cis ; and since in some respects it is suggestive of groups even beyond it (pecu- 

 liarities moreover which are supposed to be of greater importance than those by 

 which it is attracted to the Ft in Idee, — and which its very cylindi"ic form and its 

 anteriorly rugulose pronotum would especially represent), I believe it is more 

 natural to keep it nearer to this extremity of the Cissldce than to the other, — its 

 tendency (as just stated) being rather in the dh-ection of the departments in 

 advance of us than of those which we have left behind. The Ptilini reside abnost 

 exclusively in rotten wood, and are most frequently to be found about houses, — in 

 the timber of which their rounded perforations are often but too conspicuous. 



218. Ptilinus cylindripennis, Woll. 



P. cylindricus rufescenti- vel fuscescenti-brunneus et dense subtiliter pubescens, prothorace sub- 

 globoso convexo granulato necnon antice mucronibus dispersis asperato, elytris vix punctulatis, 

 antennis pedibusque pallidioribus. 

 Mas, paulo minor, antennis valde flabellatis. 



Long. Corp. lin. 1^-31. 



Habitat Maderam, ab ord maritima usque ad 3500' s. m. ascendens : in vinetis circa urbem Funchalen- 

 sem sitis, ad Sanctam Annam, necnon etiam in aperto bine inde observavi. 



P. elongated and cylindrical, varying from a dark fuscous hue into a bright reddish-brown, and 

 densely, though very minutely pubescent. Prvthorax exceedingly convex and globose ; minutely 



