INSECTA MADERENSIA. 333 



254. Acalles pulverulentus, Woll. 



A. oblongTis, squamis fusco-brunneis dense tectus; pi-othorace breviusculo latiusculo, traiisversim vix 

 subtuberculato, ad apicem minus producto et vix setuloso ; elytris profunde punctato-striatis 

 (punctis maximis), ad latera subrectis, baud nodulosis sed interstitiis alternis post medium plus 

 minusve elevatis et postice abrupte terminatis, plaga sublunulata communi postmedia, (antice et 

 postice nigro-terminata) obscm-issima ornatis. 



Long. Corp. lin. 3^. 



Habitat ill locis submaritimis Maderse australis, a meipso sub lapide prope lu-bem Fuuchalensem 

 semel tantum lectus. 



A. oblong, densely clothed with dull, rusty-brown scales. Rostrum piceous, opake and coarsely 

 punctured in the males, and with a somewhat more e\'ident central hne, or keel, than in the 

 other species. Prothorax rather short and wide, especially before the middle, with a shallow 

 dorsal channel, and with exceedingly faint indications of tubercles across the central portion ; less 

 produced at the apex than in any of the other species, where moreover the setae are, apparently, 

 not more developed than in other parts of the surface. Elytra exceedingly deeply punctate- 

 striated (the punctures being larger than is the case in any of the other species) ; and somewhat 

 parallel at the sides ; scarcely nodulose, though with the alternate interstices just perceptiblv 

 raised at the base, and more evidently so behind the middle, where they are abruptly terminated 

 posteriorly ; and with a transverse, sublunulate, postniedial abbreviated fascia, or patch, common 

 to both (and terminated before and behind by an obscure blackish cloud), very indistinctly paler. 

 Antenna ferruginous. Femora and tibue (especially the latter) each encircled by a darker ring. 



Judging from the single specimen (a male) wldch I have hitherto captured of 

 this insect, it would seem to be the largest of the Madeu'an Acalles, and well 

 distinguished specifically from all the rest, — its oblong and comparatively parallel 

 outline, rather short and broad prothorax, which is nearly untubercled, and is less 

 acuminated and setose anteriorly than in any of the other species, added to the 

 enormous punctui'es of its elytra, its very obscure subluuvilate postmedia! band, 

 and its almost uniformly brown surface (which, from the denseness and the regu- 

 larity of the scales with which it is clothed, has a dull and somewhat dusty appear- 

 ance), at once combining to sej)arate it from the remainder. In its comparatively 

 unproduced pronotum it approaches the^. Neptumis, from the Salvages, wliilst its 

 general habit and aspect are eminently characteristic of the fii'st of the two 

 sections into which I have distributed the Madeiran representatives of the genus. 

 It appears to occur at a rather low elevation, — my unique example having been 

 taken by myself, from beneath a stone in the vicinity of Funchal, in a dry exposed 

 spot near the coast. 



255. Acalles obUtus, WoU. 



A. elongato-subovatus, squamis fusco-brunneis dense tectus ; prothorace subangusto transversini 

 setoso-subtuberculato, ad apicem parce bifasciculato-setoso ; elytris profunde punctato-striatis, ad 



