116 MANDIBULATA. — COLEOPTERA. 



plicatus of Gyllenhal, may form a natural transition from the 

 Scydmsenidse to the Pselophidse ; to the former of which families I 

 should have referred it, were it not that the engraving of the 

 species was in too far advanced a state to permit its omission in 

 the present volume. 



Sp. 1. Scydmaenoides. Plate xviii. f. 2.—Piceo-nigra, pubescens, thorace pul- 

 vinato, postice lined punctorum impressorum, elytris basi plicatis, antennis 

 pedibusque rufo-ferrugineis. (Long. corp. ^ — f lin.) 



Eu. Scydmaenoides mihi. 



Pitchy or castaneous-black, slightly glossy, clothed with a golden pubescence : 

 head punctured : thorax punctured, with five impressed foveas placed trans- 

 versely near the base : elytra very finely and faintly punctured, the base with 

 two abbreviated impressed lines, giving that part a plicate appearance ; the 

 apex sometimes castaneous : legs and antenna? rufo-ferruginous, the club of 

 the latter sometimes fuscous. 



Of this remarkable insect I found a single specimen in June, 

 1827, flying in a garden at Ripley. " Pettyward-wood, near 

 Wimbledon." — Mr. Waterhouse, to whom I am indebted for the 

 drawing, whence the accompanying figure was engraved. " Moss, 

 Highgate.'" — A. Cooper, Esq. 



Genus CLXVII. — Xylotrogus * mihi. 



Antennae about as long as the thorax, with the two basal joints more robust than 

 the following ; the first being cylindric, the second subglobose, the third to the 

 ninth slightly increasing in diameter, the third being longest and the ninth 

 shortest and subglobose ; the eighth shorter than the seventh, and the two 

 apical joints forming an abrupt Particulate club, the first joint of which is 

 subquadrate, the terminal ovate obtuse. Palpi very short : mandibles exserted : 

 head broad: eyes large, prominent: thorax cordate; the anterior margins 

 produced in front, the lateral margins entire, produced anteriorly into an 

 obtuse angular projection, and rounded from a little beyond the middle to 

 the base, producing a waved outline; the base truncate: elytra elongate, 

 entire: body elongate-cylindric : legs short: femora robust: tibice slender, 

 simple: tarsi slender, abbreviated, quadriarticulate. 



The distinctly cordate thorax of this genus, of which the anterior 

 angles are produced into an obtuse projection, while the posterior 

 ones are gradually rounded off, and the margins not crenate, 

 united to the elongate-cylindric body, dissimilarity in the structure 



* SiiXcw, lignum; T^yoi, rode. 



