136 INSECTA MADERENSIA. 



sex) wrinkled transversely ; the suture and alternate interstices most obscurely raised. Antenna 



and tarsi ferruginous. 

 Male, with the basal joint of the two hinder tarsi produced beneath into a vei-y elongated, spiniform 



lobe, — which to the naked eye appears like an acute articulated spine, but under the microscope 



an elongated lobe, narrowed towards the apex though rouudcd, aud furnished with a pencil of 



minute hairs, at the extreme jioint. 

 Female, \\ itli the tarsi simple. 



Easily distinguished by its robust and somewhat cylindrical form, by its dark 

 subglabrous sui'face, and by the large, though somewhat shallow punctures of its 

 clj'lra. Apart from which, the males may be of course at once known by the 

 structure of their tarsi, — of which the four anterior ones are simple, whUst the 

 posterior 2»ir have their basal joint developed beneath into a long spiniform lobe. 

 It is apparently one of the rarer forms, or at any rate partial in its distribution. 

 My specimens were chiefly captured at the Ribeiro Frio and at the Peijaa de 

 C6rte, — during August. It is the only Tarph'ms which I have hitherto observed 

 in the Ribeiro de Santa Luzia, where, at the extreme head of the ravine, close to 

 the great waterfall, it is still tolerably abundant vmder the bark, and amongst the 

 remains of the old trees with wliich that gorge must have been once densely 

 clothed, — but which are now rapidly disappearing, as in so many other parts of 

 the island, before the woodman's axe. 



109. Tarphius spinipes, Woll. 



T. subovato-oblongus vix opacus nigro-piceus, prothoracc subquadrato, granulis crebris magnis obtu- 

 sissimis obsito, elytris concoloribus seriato-punctatis (punctis minus profundis), interstitiis 

 alternis leviter elevatis. 

 Mas, tarsis anticis et posticis articulo basilari in lobum (in posticis elongatissimum) spiniformeni 



subtus producto, intermcdiis vix simplicibus. 

 Fmm. adhuc latet. (Specimen unicum, sc. masculuui, tantum habeo.) 

 Long. corp. lin. If. 



Habitat in Madera sylvatiea, semel tantum repertus. 



T. rather smaller than the T. inornatus, also less parallel and rather more ovate, dark piceous, a good 

 deal obscured with scales, and but very slightly shining. Head and protfwrax closely beset with 

 large and very obtuse granules : the latter apparently unehannclcd, and subquadrate. Eli/tra 

 concolorous, lightly seriate-punctate, and a little wrinkled transversely, — the puuctiu'cs being less 

 distinct than those of the last species ; the sutui*e and alternate interstices most obscurely raised. 

 Antenna and leffs ferruginous : the latter with their femora and tibi?e only slightly darker than 

 the tai'si, — beiug merely a little more picescent. 

 Male, with basal joint of the fore-tarsi produced beneath into a robust, elongated, spiniform lobe, — 

 which appears under a high magnifying power to be obtusely roimded and furnished with a 

 pencil of hairs at the apex : the intermediate ones nearly simple, the basal joint being most 

 obsciu-ely produced beneath : the posterior pau- with the basal joint produced into a very long, 



