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Desa-iptwns of new Coleo2')tcra belonging to the families 

 PsEPHKNiD/E and CvrHONiD.E ; by Chas. O. Waterhouse. 



Recently I have met with a new s^^ecies o£ the genus 

 Psephenus, below described ; and as the question of the relation- 

 ship between the Parnidce and Cyphonidce through Psephemm 

 and Enhria is very interesting, I take the opportunity of 

 describing three new genera, which I consider undoubtedly 

 belong the Euhn'tna', but which have much in common 

 with Tychepseplms, placed by myself in the Psephenida^. 

 These three new genera, as well as most of the species of Scirtes 

 here described, were received by the British Museum from 

 Mr. Bowring. 



Psephenus Darwinii, u. sp. 



Fuscus, sat nitidus, subtilissime pilosus ; thoracis angulis 

 posticis acutis, pedibus sordide testaceis. Long. 2^ lin. 



Closely resembles P. Lecontei, but is at once distinguished l)y 

 the thorax being broadest at the posterior angles, which are 

 moreover very acute. The apical joint of the maxillary jialpi 

 much smaller than in P. Lecontei. Thorax gently convex, very 

 finely and very closely punctured, bisinuate at the base. Elytra 

 densely and finely punctured, with traces of three or four obtuse 

 costfB on each. 



liab. Eio Janeiro. 



A single example taken by Mr. Charles Darwin in May, 

 1832, during the voyage of H.M.S. Beagle; it has the following 

 note respecting it, " habits the same as Elmis, living under 

 stones in running water." 



SCHINOSTETHUS, n. gen. 



General form of Enhria. Lobes of the maxilla^ slender, 

 acuminate, the outer one twice as long as the iiiner ; the 

 inner lobe more penicillate ; maxillary palpi rather large, 

 penultimate joint cylindrical, one-third longer than broad; the 



