598 INSECTA MADERENSIA. 



and fringed on either side with a longitudinal row of fulvescent hau's, — which become gradually 

 longer, and more and more convergent, 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. 



The slender form, and the bright orange spot on each of the elytra of the pre- 

 sent species will at once distinguish it from the other Steni here described. It is a 

 common Eurojiean insect, and universal throughout the intermediate altitudes of 

 Madeira, — occiu'ring beneath stones and shingle at the margins of the streams, as 

 well as amongst wet mud on the moist ledges of the rocks. I have taken it in 

 the Riljeiro de Santa Luzia and at the Curral das Romeiras (above Funchal), 

 during the autumn and sprmg ; and, in August of 1850, at the Feijaa de C6rte. 



468. Stenus providus. 

 S. iiigcr robustus, creberriine et i-ugose punctatus, parcissime subargenteo-pubescens, prothorace 

 obovato in disco canaliculate, palpis pedibusquc testaceis, femoribus ad apicem late, tibiis (vcl 

 omnino vel ad basin solam) tarsisquc obscurioribus. 

 Mas, pectore impresso, densius longiusque subfulvescenti-pubescente ; abdominis segmentis quinque 

 baseos subtus longitudinaliter leviter impressis (impressione densius pubescente sed postice 

 glabra, politissimd impunctata, ad latera a segmento secundo pilis paulatim longioribus introrsum 

 vergentibus ciliata., necuon in segmento quinto carinA denticuliformi utrinque terminata), seg- 

 mento quinto inter denticulos acutos late emarginato, sexto profunde subtriungulariter exciso : 

 femoribus posterioribus subincrassatis, posticis intus longius pubescentibus. 

 Fcem., pectore vix impresso; abdominis segmento sexto subtus produeto rotundato, sed ad apicem 

 ipsum summum minutissime emarginato : femoribus posticis baud densius pubescentibus. 

 Long. Corp. lin. 2-2^. 



Stenus prmidus, Erieh. Ktif. der Mark Brand, i. 54G (1837). 



, Erich. Gen. et Spec. Staph. 707 (1839). 



, Hear, Fna Col. Helv. i. 217 (18il). 



, Eedt. Fna Ausir. 726 (1849). 



Habitat Maderam, in locis similibus ac prsecedens, sed illo rarior. 



S. l)lack, robust, nearly opake, and almost free from pubescence above, except on the abdomen (where 

 it is sparingly besprinkled with short and somewhat silvery pile). Head and prothorax very 

 closely and roughly punctured; the former slightly excavated, and deeply bisulcate, between the 

 eyes, — and with they;o//)! pale testaceous ; the latter obovate (being widest before the middle), and 

 with a tolerably apparent channel in the centre of its disk (which has a tendency to be evanescent 

 both behind and in front). Elytra as closely and coarsely punctured as the head and prothorax. 

 Antenna nearly black, the intermediate joints having scarcely any tendency to be picescent. Leffs 

 diluted-testaceous, — with the coxa and trochanters black, and with the femora at their apex 

 broadly and distinctly (and sometimes the tibice, especially towards their extremity, and the tarsi, 

 more obscurely) darkened. 



