600 INSECTA MADERENSIA. 



impresso (impressione impunctata politissima, nccnon ad latera pilis paulatini valde elongatis 

 introrsum vergentibus ciliatA). 

 Ficm., abdominis segmento sexto subtus leviter producto rotundato. 

 Long. Corp. lin. 1^. 



Habitat in Madera sylvatica excels^, rarissimus : per marginem rivuli cujusdam parvT ad Cruzinhas 

 (circa 5000' s. m.) mense Julio a.d. 1850 sub foliis arborum dnjcctis duo specimina inveni. 



S. black, shining, and comparatively densely clothed with long and fulvescent pile. Head and pro- 

 thorax remotely and finely punctured ; the former large, excavated and bisulcate between the 

 eyes (the intermediate ridge being raised behind iuto a keel), — and with the palpi testaceous; 

 the latter obovate, exceedingly uneven, and obsoletely channeled posteriorly. Elytra as lightly 

 and distantly punctured as the prothorax; and, likewise, exceedingly undulating or uneven. 

 Antenna and legs dilutcd-testaceous ; the former just perceptibly dusky towards their extremity ; 

 the latter with their cuxx dark piceous, and with their femora at the apex broadly (though very 

 slightly) infuscated. 



Male, with the fifth and sixth segments of the abdomen beneath obsoletely sinuated (or subemargi- 

 nate) ; Xhe, former broadly, but very lightly, impressed (the impression glabrous, highly polished 

 and unpunrtured ; and fringed on either side with a longitudinal row of veiy long, stiff and 

 darkly-fulvesccnt hairs, — which become gradually longer, and more and more inwardly conver- 

 gent, from the base). 



Female, with the abdomen beneath free from additional longer pile, but with the sixth segment 

 slightly produced and rounded at its apex. 



A most peculiar and distinct species, — its sliining, extremely uneven, and com- 

 paratively lightly and remotely punctiu'cd surface, in conjunction -with its large 

 head, and the long and somewhat fulvescent pile with which it is clothed, giving 

 it a character wluch it is impossihle to mistake. It is apparently one of the rai-est 

 of the Madeu-an Coleoptera, and confined to the iipper limits of the sylvan 

 districts, — the only two specimens wliich I have seen having been captm-ed by 

 myself, from imder moist decaying leaves, at the edges of a minute trickling 

 stream in the lofty region of the Cruzinhas (about 5000 feet above the sea), during 

 July of 1850. It is an insect of a very peculiar appearance, — being rather sug- 

 gestive at first sight of a larva of one of the smaller ForJicnlcB. 



§ IT. Abdomen immarginatum ; tarsi articulo quarto bilobo. 



470. Stenus Heeri, Wall. 

 S. niger subcylindricus, creberrime et sat rugose punctatus, densius fulvo-pubescens, prothorace 

 obovato vix insequali, elytris brevibus, antennarum et palporum basi pedibusque piceo-testaceis. 

 Mas, abdomine simplice (aut potius segmento sexto subtus obsoletissime subsinuato). 

 Foem., abdominis segmento sexto subtns leviter producto rotundato. 

 Var. /3. vix major, antennis, palpis pedibusque paulo longioribus et pallidioribus. 

 Long. Corp. lin. Ij-lj- 



