(Page 4 PI) 



sely shagreened, dull (or opaque), and that they, except for a smooth 



middle-line, are densely punctated. Otherwise same as Caf ius . 



To this jenus only 1 European species, widely distributed at the 



European coasts, where it lives under rotting seaweeds; also found 



in Denmark. 



1. R. sericeus Holme. 



(Holme Trans. Ent. Soc. Lond. 1337, 64; Thorns. Skand. Col. II 

 (Gafius), 153; Muls. et Rey Bre'vip. 1877, 433; -Janglb. Kaf. K. 11, 462). 



Narrow and of e-^ual breadth, in appearance somewhat like a Xantho - 

 linus , especially identifiable by the above stated characteristics; 

 but as a whole otherwise very variable. 



(Pa^e 422) 

 Iviulsant et Pey divides it into 3 species: sericeus , pruinosus . and 

 f ilua. . of which however the latter two are most reasonably included 

 as varieties of the typical form. 



The typical form is black, dull; head and pronotum with very fine 

 and scattered, elytra and abdomen with dense, prostrate and short, 

 silky, grayish-jjlistenlnj hair; antennae toward tiie tip, or entirely^ 

 brownish, le^s or at least their knees and tarsi brov.nish-red , more rarely 

 reddish-yellow. 



The head as broad as pronotum, fully as long as broad, with small 

 eyes and longer temples with rounded off rectangular corners; anten- 

 nae rather slender, their next-last Joints hardly transverse; pro- 

 notum narrower than elytra, longer then broad, with almost part^llel 

 sides or posteriorly feebly narrowing, pronotum and head with densely 



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