48 TERTIARY COLEOPTERA OF NORTH AMERICA. 



pointed tip of the abdomen. The abdomen is black with long black haix-s, 

 sparsely scattered, and most conspicuous as edging the hind borders of the 

 segments. Terminal appendages rather short, blunt, and very hairy. 



Length of body, 5.5 mm.; width of same, 1.2 mm.; length of pro- 

 thorax, 0.65 mm. ; breadth of same, 0.85 mm. ; length of middle tibia, 0.5 mm. 



Florissant, Colorado; one specimen, No. 3291. 



HETEROTHOPS Stephens. 



A small genus, most of whose species are found in the north temperate 

 regions of the Old World, but four or five in North America. A single 

 species has been found fossil in Colorado. 



Heterothops conticens sp. nov. 



PI. V, figs. 8, 9. 



A single specimen is referred here with some doubt, as it is not very 

 well preserved, but it seems to bear a closer resemblance to the species of 

 this genus than to any other. It is the smallest of the Florissant Staphy- 

 linidse unless the shorter but stouter Platystethus archetypus be looked upon 

 as smaller. It is very compact, is broadest at the elytra, narrows rapidly in 

 front and less rapidly behind, so as to be somewhat fusiform, the extremity 

 of the abdomen bluntly rounded. The head is short, subtriangular, and 

 rounded, the antennae (fig. 9) closely resemble those of H. pusio LeC, 

 excepting that the last joint is only a little longer and considerably lai'ger 

 than the penultimate, instead of being twice as long and scarcely any 

 broader ; they scarcely reach the posterior border of the pronotum. The 

 latter is smooth, considerably broader than long, tapers anteriorly a good 

 deal, but its surface is too broken to show what jDunctures are present. 

 The elytra are hairy, as are the sides of the abdomen, and the whole body 

 is of a nearly uniform very dark castaneous. 



Length of body, 3.45 mm.; breadth, 1 mm. 



Florissant, Colorado ; one specimen. No. 120. 



QUEDIUS Stephens. 



A genus with numerous species, widespread in both worlds. The 

 older Tertiaries possess five species, two each at Aix and Florissant, and 

 one in amber. 



