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Descriptions of new Coleoptera belonging to the families 

 PsEPHENiD/E and CvPHONiD.E ; by Chas. O. Waterhouse, 



Recently I have met with a new species of the genus 

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

 ship between the Parnidce and CijphonidcE through Psephenus 

 and Euhria is very interesting, I take the opportunity of 

 describing three new genera, which I consider undoubtedly 

 belong the Eubriina% liut -which have much in common 

 with Ti/rhepsephus, placed by myself in the Psephenidce. 

 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. "1^ 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 palpi 

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

 finely and very closely punctiu-ed, bisinuate at the base. Elytra 

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

 costfc on each. 



Hab. Rio Janeiro. 



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

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

 note respecting it, " habits the same as Elinis, liviug under 

 stones in running water." 



SCIIIXOSTETHUS, U. geu. 



General form of Euhria. Lobes of the maxilUu slcndei", 

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

 inner lobe more pcnicillate ; maxillary palpi rather large, 

 penultimate joint cylindrical, one-third longer than bx'oad; the 



