1 J4 TERTIARY COLEOPTERA OF NORTH AMERICA. 



The species described below, from the Oligocene of Colorado, is the 

 only extinct form of this family yet known; but a recent species of Parnus 

 has been found in the Pleistocene of Galicia. 



PSEPHENUS Haldeman. 



This is a North American genus with only two species. A single fossil 

 species occurs in Colorado. 



PsEPHENUS LUTULENTUS sp. HOY. 



PL X, %. 8. 



Ovate. Head with perfectly regular semicircular front with a curve 

 that, apart from the eyes, would make the head longer than broad. Eyes 

 protuberant, globular, much more than half as long as the head. Antenna? 

 reaching fully to the base of the elytra, moderately slender, the somewhat 

 moniliform joints increasing slightly in size to the tip, the apical joint sub- 

 globular, slightly elongate. The pronotum broadens far less rapidly than 

 in the existing P. Iccotiti'i LeC., and is much shorter than there, being at the 

 greatest not much longer than the anterior breadth, but has the same 

 sinuate hind margin as in the modern species; the anterior lateral angles 

 are joined by a semicircular impression, and behind it, parallel to and so 

 concentric with it and lying midway between it and the hind margin, is a 

 second similar line. The surface both of head and thorax appears 1o have 

 had a similar sculpturing, which looks as if consisting of crowded shallow 

 depressions about as large as the facets of the eye. Scutellum slender, 

 moderate. Klytra with the same sculpturing as the head and thorax, more 

 than twice as long as thev, broadest, at end of basal third. 



Length, 6 mm.: breadth, .'$.(> mm. 



Florissant, Colorado; one specimen. No. '.(421. 



In this family, beginning the Serricornia, and in the succeeding families, 

 but \ cry few of the American fossil species known to me are described or 

 considered. It mav nevertheless be well to continue in each case the brief 



