88 TERTIARY COLFOPTERA OF NORTH AMERICA. 



Sciitellum rather large, triangular, equiangular, the posterior angle well 

 rounded. Elytra at base of the extreme width of the thorax and suhpar- 

 allel, together a third longer than broad, and half as lon^ ai^aiu as head 

 and thorax together, truncate, with rounded apex, exposing two abdominal 

 segments, with faint and rather numerous stria', the interspaces exceed- 

 ingly finely and delicately punctulate. Abdomen faintly punctate. Xo 

 signs of any villosity in any part of the body, but this may be accidental, 

 as the tibia 1 appear to be as villous as in the modern species of Xitidula. 



The species does not appeal- to be at all nearly related to any of our 

 living native species, and the form of the head, the absence of any inde- 

 pendent prominence of the clypeus, with the rapidly narrowing thorax and 

 striate elytra, lead one to suspect that it will be found impossible to retain 

 it in this genus. The general aspect is that of Nitidula rather than of any 

 other genus of the family, and the legs have a similar structure. Unfortu- 

 nately the antennae are nol preserved. It is nearest X. nttipex Linn. 



Length, (i.5 mm.; breadth, l.S mm. 



Florissant, Colorado: one specimen, No. 135<!">. 



PKOMETOPIA Erichson. 



This is a genus of very wide range, but with exceedingly few species, 

 of which one is found in North America; those of the Old World occur in 

 the Tropics. One fossil species has been recorded from British Columbia. 



PROMETOPIA DEPILIS. 



Prometopia <///'//>< Scudd.. Rep. Proy. (rcol. Surv. Can.. ls7r>-7<!, i!78-:i79 (French 

 cd.. :-',os -:;n;i) (ls77): Tcrt. Ins. N. A., r.ou. pi. ~2, hV. :.". (ls<()). 



< ( >uesnel, llritish (.(lumbia. 



PIIKNOLIA Krit-lisnii. 



A monotyjiic genus, found in North America, where also a single fossil 

 is found, in the Tertiary of Wyoming. 



1'lIKXOI.IA INCAI'AX. 



I-IIJHI.,' Scudd.. Hull. I'. S. (icol. (irdo-r. Surv. Terr.. II. so (lS7li); Tort. 

 Ins. N. A.. I '.in. pi. 7. liij-. i':; (l.v.ni). 



( ireen Ifiver, \\' \ omiii"'. 



