64 INSECTA MADERENSIA. 



perhaps be regarded as the representative of the common European T. minntus in 

 these islands ; which indeed in general aspect it somewhat resembles, though at 

 the same time with abundant distinctive characters of its otvti. Thus, for instance, 

 it is always very much smaller than that insect, and its colour is invariably pale 

 lurid-testaceous (instead of rufo-piceous), whilst its head is of a deep black ; its 

 prothorax is subcordate (instead of transverse), and proportionably much longer 

 than in that species ; its cl;v'tra are almost impercejitibly striated, and its antennae 

 are extremely short and robust, being scarcely more than half the length of those 

 of the T. mvmiUis. It is apparently extremely rare, the only spot in which I have 

 observed it being at Santa Anna, in the north of the island, where, at the end of 

 June 1850, I captured many specimens, on several occasions, beneath the chestnut- 

 trees in the vineyard of Senhor Louiz Acciaioly, and invariably in the perforations 

 of di'ied cow-dung, — a somewhat singular liabitat for a Trechiis ; nevertheless I was 

 not able to procui-e it under any other circumstances. 



§ II. Apterus : mentwm dente medio bifida instruct urn : palpi articulo ultimo subfusiformi-conico. 



(Subgenus CALOTEECHUS, WoU.) 

 A. Elytra phis minusve varier/afa. 



47. Trechus nigrocruciatus, n^oll. (Tab. II. fig. l.) 



T. ovatus nigro-piceus, prothorace subquadrato basi lato et utrinque impresso angulis posticis sub- 

 acuminato-rectis, eljrtris mox pone basin convexis leviter striatis rufo-testaceis cruce maxima 

 nigro-picea ornatis, antennis infuscatis, pedibus pallidis. 

 Var. fi. omnino pallidior, prothorace ad latera testaceo, elji:ris pallidis fascia subapicali dentata 

 nigrescenti ornatis. 



Long. Corp. lin. 2j-2j. 



Habitat in Madcnl sylvatica excelsa, sub lapidibus foliisque arborum dejectis, circa 5000' s. m., raris- 

 simiis : in locis humidiusculis prope Cruzinhas, nccnon ad summam originem convallis Ribeiro 

 Fundo dicta>, quai in regione Fanalensi sita est, mense Julio a.d. 1850 primus inveni. 



T. ovate, shining, and piceous-black. Prothorax subquadrate, wide behind and narrowed in front ; 

 the posterior angles somewhat acuminated and nearly right angles ; with a deep dorsal channel ; 

 and a wide, somewhat wrinkled fovea on either side at the base ; the lateral margins a little 

 rcflexc'd, and in most instances vciy obscurely rufcscent. Elytra convex just behind the base, 

 rather lightly striated, and with two minutely impressed points on the disk of each near the 

 third stria from the suture; rufo-testaceous, with a broad, immensely developed black cross in 

 the centre, occupying the greater portion of the entire surface, and leaving only an elongated 

 patch about the shoulders, the apex, and a narrow ill-defined marginal line (connecting the two), 

 pale. Antenna infuscatcj their basal joints, the pulp i and the legs pale testaceous, — the tarsi at 

 base and the tibia at apex being usually a little obscurer. 

 Var. /3. altogether paler ; the lateral margins of the prothorax being dull testaceous ; and the 

 elytra, with the exception of a zigzag postmedial fascia which is more or less black, entirely pale. 



