INSECTA MADERENSIA. 593 



with a central unpunctured polished line, — which is slightly raised into a keel. Elytra shining, 

 very finely and sparingly puuetulated, and with the hinder margin of each testaceous. Antenna 

 ferruginous, or piceo-ferruginous, and rather short. Legs testaceous, — with their tibia and the 

 apices of the /owr hinder femora more or less infuscated. 



Rather a common insect, beneath stones in clamp spots (particularly near the 

 edges of the streams), in most parts of Madeu'a at intermediate elevations. I have 

 taken it in the Ribeiro de Santa Luzia, during the spring ; and (in the north of 

 the island) at Santa Anna and the Lombo dos Pecegueiros, in June and July. It 

 occurs throu.ghout the greater portion of central Europe, being recorded in Ger- 

 manv, France, Switzerland and Austria. 



Genus 205. SUNIUS. 



(Leach) Steph. lU. Brit. Ent. v. 274 (1832). 



Corpus parviim, elongato-linearc vel elongatum, fere opacum et dense punctatum : capite magno, plus 

 minusve oblongo, ad basin truncate; oculis\e\ parvis vel mediocribus, subrotundatis : prothorace 

 subovato : alis plerumque sat amplis : abdomine marginato, lineari vel basin versus leviter 

 angustato ; segmento sexto in maribus subtus triangulariter inciso, in foeminis integro rotundato. 

 Antenna ut in Eugilo, sed paulo longiores graciliores, articulo ultimo oblongo. Instrumenta 

 cibaria fere ut in Rugilo, sed palporum maxillarium articulus ultimxis subtilissimus (fegre obser- 

 vandus). Pe(/es plerumque breviusculi : tarsis 5-articulatis, articulis quatuor baseos longitudine 

 decrescentibus (quarto brevissimo, lobo membraneo subtus aucto), quinto parvo (quartum parum 

 excedente). 



The Sunii may be easily recognised from the Rngili by their generally narrower 

 outline and more opake surface (the latter having the elytra usually somewhat 

 shining and only lightly sculptured), by their more basally-truncated heads and 

 less anteriorly-attenuated (unkeeled) prothoraces, by the scarcely distinguishable 

 terminal joint of their maxillary palpi, and by their shorter legs and perceptibly 

 longer and slenderer antennae, — the first of which have the penultimate articula- 

 tion of their tarsi bilobed (or rather, increased by a membrane beneath), and the 

 ultimate one much more abbre\dated than is the case in that genus ; whilst the 

 second have their final joint oblong, instead of ovate and acuminated. In their 

 habits they diCFer but slightly from either the members of that group or from the 

 Steni, — occurring in damp spots, though more commonly perhaps in grassy places 

 beneath stones (or under vegetable refuse) than by the edges of streams. 



464. Svinius angustatus. 

 •S. niger, capite rotundato-oblongo latiusculo, elytro singulo ad apicem sinuatim testaceo, antennis 



pedibusque pallido-testaceis. 

 Long. corp. lin. \\-\i. 



4g 



