INSECTA MADERENSIA. 601 



Habitat per IMaclerje partem sylvaticam, praesertim inter 3000' et 5000' s.m., aestate rarior : in 

 regione Fanalensi prsedominat, qua mense Julio a.d. 1850 plurima specimina cepi. 



Stenus valde distinctus, et in honorem amici el. Heer, qui in Helvetia per tot annos Entomologise 

 scientiam ornavit, citatus. 



S. black, subcylindrical, nearly opake, and densely clothed with a fulvescent pubescence (which is 

 both denser and of a yellon-er tint than that of the jS. undulatus). Head und prothorax very 

 closely and sufficiently roughly punctured ; the former excavated and bisulcate between the eyes 

 (the intermediate ridge being raised behind into a keel), — and with the palpi dull testaceous at 

 their base, but obscured towards their apex ; the latter obovate, very slightly uneven, and with 

 most obscure indications of an obsolete channel in front. Elytra exceedingly short, and about 

 as roughly and closely punctured as the head and prothorax. Abdomen subconical, and un- 

 margined. Antennce at base, and the legs, more or less brightly piceo-testaceous ; the former 

 dusky at their extremity ; the latter with the extreme apices of the femora usually darkened. 

 Tarsi with the fourth joint bilobed. 



Male, with the abdomen beneath simple, having neither additional pile nor any of the segments 

 notched, — though the faintest possible tendency to be apically sinuated is just traceable in 

 the sixth. 



Female, vrith the abdomen similar to that of the male, except that the sixth segment is slightly pro- 

 duced and rounded at its apex. 



Var. /3. rather larger ; and with the autennae, palpi and legs proportionably a little longer, and of 

 an altogether paler hue. 



The smallest of the Macleiran Steni, and (apart from its ■unmarginecl abdomen 

 and the bilobed penultimate joint of its tarsi, which remove it into an altogether 

 different section) it may be at once recognised by its exceedingly abbreviated elytra, 

 and by the y«foo2W pubescence with which it is densely clad. Like the ^S*. undulatus, 

 it is a remarkably indigenous insect, and principally attached to the upper portion 

 of the sylvan regions, — where however it wovild appear to be local, if not indeed 

 actually scarce. I have taken it beneath moist leaves, and at the edges of the 

 minute streams, at the Cruzinhas and Fanal (more than 5000 feet above the sea), 

 during July ; and at the Eeijaa de C6rte, in August. The var. (3. I have captui-ed, 

 likewise, at the Cruzinhas ; as also, from amongst wet fern, at the Lombo dos 

 Pecegueiros. 



(Subf. 6. OXYTELIDES.) 



Genus 208. PLATYSTHETUS. 



Mannerheim, Bracliel. 46 (1831). 



Corpus parvum, suboblongo-lineare, subdepressum et fere glabrum : capite porrecto, prothoraci 

 immisso (in maribus paulo majore necnon antice ssepe bispinoso) ; oculis sat parvis, rotundatis : 

 prothorace transverso, basi rotundato, in medio profunde canaliculato : elytris apice dehiscentibus : 

 alis amplis (interdum amplissimis) : abdomine marginato, sursum reflectendo, subtus secundum 

 sexum diverse. Antenna sub frontis margine laterali insertse, subrefractse, apicem versus sensim 



4 H 



