344 INSECTA MADERENSIA. 



belong. The Ti/chii are generally densely clothed with scales, hut are not often 

 variegated, — and never nodulose, as is the case with the preceding genus. They 

 may he further recognised by their somewhat shortened prothorax, which is more 

 or less uniformly rounded at the sides, and (which however is characteristic of the 

 entii'C Erirh'mides, the subfamily to ^A'hich they belong) by their want of a pectoral 

 groove, and by their approximated anterior legs. In the Madeii'a Islands the 

 species have their rostra more or less sculptm'ed A\T.th longitudinal sulci. 



§ I. Carpus magnum crassum ; pedibus valde rohustis. 



266. Tychius robustus, Woll. 



T. ovatus fusco-piceus, squamis flavescenti-brunneis piliformibus dense tectus, prothorace transverse 

 profundc punctato ad latei-a rotundato, elyti-is profunda crenato-striatis, interstitiis miuutissime 

 punctulatis, rostro antennisque riifo-piceis, illo sulculis punctatis a basi usque ad apicem ductis 

 longitudinaliter instructo, oculis rcniformibus. 



Long. Corp. lin. 2i-3. 



HnbUat sub lapidibus in locis aridis Portus Sancti, necnon in insulis Deserta: Grandis et Deserta? 

 Horcalis, a vere novo usque ad a;statem, liinc indc nou infrequens : in Madera propria mihi 

 adliuc non obvius est. 



T. thick, ovate, robust, and broad ; browuish-piceous, and densely clothed with fine, hair-like, yellowish- 

 brown scales. liustrum very long and linear; rufo-piccous, and (except at the extreme base) 

 free from scales ; with several deeply-punctured longitudinal sulci, commencing just in front of 

 the base, and continuing to about the insertion of the antenme, — where they are slightly inter- 

 rui)ted, and afterwards resumed to the apex : eyes large, reniform, and extending a little beneath 

 the head. Pruthorax deeply punctured ; broad, and transverse, — the sides being considerably 

 and almost uniformly rounded. Elytra with the sides distinctly rounded, and widest about the 

 middle ; vciy deeply crenate-striated, and with the interstices very minutely punctulated. 

 Antenna; rufo-piccous, and almost free from scales. Legs exceedingly robust, and as densely 

 clothed as the rest of the surface with yellowish-brown hair-like scales. 



This beautiful and truly indigenous Ti/chliis, in its comparatively enormous size, 

 excessivclv robust limbs, and in the line, vellowish-brown, liair-like scales with 

 which it is densely clothed, recedes so much from the oilier Madeu'an S2)ecics as to 

 appear, at first sight, to be scarcely admissible into the same genus with them. 

 Still, in all essential resjiects it is a Tychius, — belonging in reality to a larger type 

 of form, which is by no means of uncommon occiu-rence in Mediterranean lati- 

 tudes. Apart from the above distinctions, its broad subovate outline, transverse 

 and laterally-rounded prothorax, and its coarsely crenate-striated elytra, in con- 

 junction with the sulci being invarial)ly continued throughout the entire length 

 (excepting a small space near to the insertion of the antennte) of its rostrum, will 

 more than suflice at once to separate it from the other two members of the grouj) 



