INSECTA MADERENSIA. 331 



separate tliemselves into two tolerably well-defined sections ; in one of wliicli the 

 size is comparatively large, the sciitellmii is obsolete, and the colours are obscure, 

 — whilst in the other they descend to a much smaller bulk, have visually their 

 scutellum quite perceptible, and their bodies adorned with more lively tints. The 

 representatives of the first of these divisions, moreover, are attached generally to 

 lower districts, scarcely ever ranging above the altitude of 2000 feet, and delighting 

 in dry and rocky localities in the vicinity of the coast ; whereas those of the 

 second attain their maximum at a far higher elevation, l)eing more particularly 

 numerous in the moist sylvan tracts between the limits of from 4000 to 5000 feet 



posticis subreetis, distiucte canaliciilato seel transversini vix siibtuberculato, ad apicein minus producto 

 et le^ater setuloso ; scutello baud observaudo ; elytris profunde punctato-striatis, ad latera suli- 

 rotundatis, carinis subinterniptis vix noduHformibus obsciiris iustriictis, plaga hastata eommuni 

 postmedia (autice et postice atro-variegata) phis mimisve obsciira, et fascicado miuuto commiuii 

 doi'sali atro ornatis ; antemiis obscure ferrugineis. 

 Long. Corp. liu. 31-5. 



Habitat iu insulis desolatis remotis "Salvages" dictis, super insulam minorem sub uomiue "Great 

 Pitou" Anglice coguitam, a Dom. Leacock nuper collectiis. 



A. oblong-ovate, densely variegated with large asby-white scales. Rostriim dark piceous, opake, exceed- 

 ingly roughly puuctiu-ed, and with a distinct abbreviated central keel, in the males ; — a little slenderer, 

 very shining, and lightly piinctm-ed iu the females. Prothorax broad before the middle, and with 

 the hinder angles almost right angles, causing the sides behind to appear comparatively straight ; 

 with a distinct dorsal channel, but with scarcely any indication of tubercles across the central portion ; 

 less produced in front than iu any of the Madeiran species except the A. pulverulenfus, and but very 

 sUghtly setose at the apex. JSlytra deeply pimctate-striated, and not much rounded at the sides ; 

 the alternate interstices slightly raised, and sometimes a Httle interrujited, though hardly sufficientlj^ 

 80 as to form nodules anywhere ; with a transverse, hastate, postmedia! abbreviated fascia, or patch, 

 common to both (and terminated before and behind by a more clouded portion of the siu'face, — and 

 variegated, especially behind, with irregidar spots, or broken lines, of a deep black), as hkevdse 

 indications, towards the sides of each, of an oblique, extremely obscure, antemedial fascia, more or 

 less distinctly paler ; and with a minute, usually distinct, fasciculated dorsal spot (Uljewise common 

 to both), and sometimes also the entire portion of the suture between the hinder point of the pale 

 hastate patch and the apex of the elytra, deep black. Antennce brownish-ferruginous, being much 

 darker than in any of the Madeiran species. TibicB encircled by a dusky ring, that on the femora 

 being usually obsolete. 



In its habits and general aspect, as weU as in its want of a scutellum, the A. Neptimus agrees with 

 those Madeiran forms which are included in the first of the two sections into which I have distributed the 

 entire number ; whilst its pale ashy-coloured scales, imtubercled prothorax, the regidarly hastate shape of 

 its elytral fascia, and the very rugosely pimctiu-ed rostrum of its male sex, would, as just stated, betoken 

 a nearer relation to the A. saxicola than to any of the remainder. Specifically, however, it is scarcely 

 necessary to add, it is of course altogether separate from that insect, even though it possesses thus 

 much in common with it ; since its comparatively enormous size, the peculiar construction of its (distinctly 

 channeled) prothorax, which has the posterior angles so nearly right angles as to cause the sides behmd 

 to appear almost straight (its anterior portion moreover being less produced than is the case with any of 

 the Madeiran species, — the A.pulverulentus excepted, which coincides with it in that respect), in conjunc- 

 tion with the accessions and modifications in the minutiae of its patches and spots (abeady pointed out), 

 are more than suificient to discriminate it from its Dezertan analogue. 



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