INSECTA MADERENSIA. 569 



apice recte truncata in medio fissa. Pedes breviusculi fragiles : tibiis omnibus plus minusve 

 parce et leviter spinulosis : tarsis 5-articulatis simplicibus; posterioribus articulo primo elongate. 



Habrocerus is so easily recognised by its anomalous antennge, that it is needless 

 to point out its distinctions from any genus except Tricliophi/a (in which the same 

 structiu'e obtains). In general contour and habits it possesses nearly all the cha- 

 racters of Tachijporus, but the singularity of its antennae (the form of which may 

 be best understood by a reference to that of Trichophya, in Plate XIII. fig. 6 a), 

 in conjunction with the obliquely-truncated external angle of its elytra, will at 

 once suffice to separate it from the species of that group. According to Erichson, 

 it constitutes a connecting liulc between Tachijporus and Tachimis : the terminal 

 joint of its maxillary palpi partaking, he remarks, of the peculiarities of both 

 genera, — being acuminated at the apex as in Tachi/poriis ; though not small and 

 subulated, but of equal breadth at its base (as in Tachimis) to the previous one. 

 The only representative known occurs sparingly in many parts of Europe, being 

 recorded in England, Germany, Erance and Sarduiia ; so that, with the addition 

 of Madeira, it would seem to possess a rather "siide geographical range. 



442. Habrocerus capUlaricomis. 

 H. nigro-piceus convexus nitidus, antennis pedibusque testaceis, illis paulo obscurioribus. 

 Long. Corp. lin. 1\. 



Tachyporus capUlaricomis, G-rav. Mon. 10 (1806). 



nodicornis (Kby), Stepli. III. Brit. Ent. v. 186 (1832). 



Habrocerus capillaricornis, Erich. Kdf. der Marie Brand, i. 401 (1839). 



Habitat Maderam sylvaticam, sub lapidibus bumidis truncisque arborum prolapsis, prsesertim inter 

 2500' et 4000' s. m., sestate sat frequens. 



H. rather broad and convex, attenuated both before and behind (especially the latter), shining, and 

 piceous-black (though sometimes altogether piceous, and occasionally, when not quite matm-e, 

 almost ferruginous). Head and prothorax very highly polished. Elytra not quite so bright. 

 Abdomen sparingly clothed with long setae, and with the hinder margin of each of the segments 

 more or less perceptibly diluted in colouring. Antenna and legs testaceous ; the former more or 

 less infuscated, or obscured. 



By no means uncommon within the sylvan districts of Madeira, — though from 

 2500 to 4000 feet above the sea may perhaps be regarded as its normal range. 

 Occurring almost exclusively during the stimmer months, and yet deHghting as it 

 does in positions where the moisture is excessive, it would seem (as we shoidd 

 naturally have expected) to attain its maximum in the dense ravines of inter- 

 mediate altitudes (around which the clouds, at that season, more especially cling). 

 It runs with the utmost velocity, and is found principally beneath stones and 

 decaying logs of wood in the vicinity of the water-coiu'ses and streams. I have 



4 D 



