94 INSECTA MADERENSIA. 



fusiformi-cyliiidrico ; maxillares longissimi ; labiales mediocres. Mentum amplum, transverso- 

 qnadratum. Lii/ula brevis lata, a])ice fissa. Pedes subuatatorii, robusti, antici brc\'iusculi : 

 femuribus iihiisqiw corapressis : his curvatis; anticis extus soriato-spinulosis, apicem versus 

 dilatatis ; posterioribus leviter spinosis, vix ciliatis : tarsis articulo primo brevissimo, secundo 

 arete connate ; posterioribus ciliatis. 



The minute size and somewhat elliptical outline of the Limuebil (which, unlike 

 Ochtheh'ms and Calob'ms, have their prothorax broadest behind), added to their 

 8-jointed antennae and their entire freedom from metallic lustre, wdll be sufficient, 

 — a])art from the distinctive peculiarities of their oral organs, which, although 

 considerable, are, necessarily, in insects thus small, less easy of observation, — at 

 once to separate them from the members of the neighbouring groups. In theu- 

 habits, they prefer stagnant water to streams, residing in shallow pools and ponds, 

 especially towards the margins, and attaching themselves to stones and decaying 

 leaves, or whatever other sul)stances chance may place in their way, — the form of 

 theu' bodies, which are flattened beneath, and arched and polished aboAC, being 

 eminently adapted for the kind of adhesion which is characteristic of the greater 

 portion of this department of the Fh'dhydnda. 



74. Linmebius grandicoUis, Woll. 



L. subclliptico-obovatus niger, minutissime et parce pubescens, subtiliter punctulatus, prothorace 



elytrisque obscure pallido-marginatis, antenuis, palpis pedibusque ferrugineis. 

 Long. Corp. lin. t. 



Habitat in aquis Madei"se, vol stagnantibus vel lente fluentibus, — ad Cruzinhas (5000' s. m.), foliis 

 arborum madidis adhferens, Julio ineunte a.d. 1850 repertus. 



Ij. somewhat ovate or elliptical, and rather acuminated posteriorly, black, slightly shining, minutely 

 and sparingly pubescent, and most delicately but rather closely punctulated. Prothorax large 

 and broad, being widest behind ; the lateral margins, especially about the hinder angles, dull 

 rufo-ferruginous ; without any appearance of a dorsal channel. Scutellum rounded and very 

 minute. Elytra acuminated behind, with the extreme margins very obscui-ely ferruginous. 

 Legs, antenna and palpi pale ferruginous. 



The present insect differs a little from all the European Limncbii which have 

 hitherto come beneath my notice, and cannot, I think, be consistently referred to 

 any of them ; its comparatively pubescent and distinctly punctulated upper surface, 

 its large prothorax, its very minute scutellum, and its much posteriorly-acumi- 

 nated clvtra combining to indicate what I have but Httlc doubt is an additional 

 species, — though one Avhich is evidently closely allied to some of the more northern 

 members of the group. It is extremely rare, — or, at any rate, local, — being appa- 

 rently confined to lofty altitudes, and to spots more or less diilicult of access. 

 The only district in fact in which I have observed it is the region of the Cruzinlias 

 (about 5000 feet above the sea), — where, during July 1850, I captm'ed many 



