68 INSECTA MADERENSIA. 



51. Trechus quadi-icollis, Woll. 



T. ovato-oblongus subdepressus rufo-ferrugineus, prothoracc subquadrato basi utrinque profunde im- 



presso angulis posticis rectis, elytris profunde striatis, antennis ferrugineis, pedibus pallidis. 

 Long. CGI-]), lin. 2g. 



Habitat Maderam australem, rarissimns; — ad Curral das Romeiras, autumno exeunte a.d. 1847, sub 

 cortice Lauri Indicte laxo semel tantum repcrtus. 



T. ovate-oblong, slightly depressed, shining, and pale rufo-testaceous. Prothorax subquadrate ; the 

 sides almost straight, and the posterior angles nearly right angles ; w-ith a distinct dorsal channel ; 

 and a deep fovea on either side at the base. Elytra somewhat parallel, deeply striated, the striae 

 being just perceptibly punctate; and with two very obscurely impressed points on the disk of 

 each near the third stria from the suture, which is behind just appreciably paler than the rest of 

 the surface. Antennce, palpi and leffs, especially the last, pale testaceous, — the tibiee being 

 scarcely more dusky than the femora and tarsi. 



The specimen from which the above description has been compiled is hitherto 

 unique ; nevertheless it presents so many distinctive features of its own that there 

 can be no doubt as to its true specific claims. Apart from its pale rufo-ferru- 

 ginous hue, which in the absence of further examples to judge from can scarcely 

 be pronounced for certain to be an invariable character, its somewhat oblong, sub- 

 parallel outUne, its rather large and square prothorax, which is scarcely at all 

 narrowed behind, and its deeply striated elytra, wUl at once serve, in conjxmction, 

 to remove it from the remainder of the Madeiran Trechi. It was captured by 

 myself, m the autumn of 18 i?, from beneath the loose bark of an old vinhatico at 

 the Ciu-ral das Romeiras, above Funchal. 



52. Trechus custos, TJ'oU. 



T. oblongo-ovatus subconvexus piceus, prothorace subquadrato basi Icviter angustato et utrinque 



impresso angulis posticis subrotundatis, elytris striatis, antennis pedibusque pallidis. 

 Long, coi-p. lin. lj-2. 



Habitat in iisdcm locis ac T. jlavoinarginatus, sed etiam paulo ultra regioncm sylvatieam hinc iudc 

 ascendens. 



T. oblong-ovate, a little convex, shining, and jjiceous ; rarely piceous-black. Prothorax subquadrate, 

 and narrowed behind ; the sides distinctly, and the posterior angles obscurely, rounded ; with a 

 dorsal channel ; and a rather obscure fovea on either side at the base. Elytra ovate, lightly 

 striated ; and with two rather distinctly impressed points on the disk of each near the third stria 

 from the suture, which, es{)ccially behind, is a little paler than the rest of the sui-face. Antemue 

 ferrugineous, and generally a little infuscate towards their apex; the palpi and the legs pale 

 testaceous, — the /e/nora at extreme base, and the tibia towards the apex, being a little dusky- 



Next to the T. Jlavomarginatus, this is vmquestionably the commonest of the 

 Madeiran Trec/i^, beiag found beneath stones and decaying logs of wood through- 



