CUllCUL10^'ID.E — CUIU'ULIOXIN.K— I i V LOBIIXI. 89 



troin AixaiulCorent; and Pissodes, two sjR-cics Inmi Siclilns imd Brunstatt. 

 Ill tlic American Tertiarit's we liiive found seven species, iin.stly eonlined 

 to the Gosiute fauna : Paehylobius witli three species from White river, 

 Green Uiver, and Roan mountains; Ilyhiliius witli three species, two fmm 

 Gi'een River and one from Florissant ; and an extinct jienus, Laccopy^nis, 

 with a single species from the Lacustrine fauna at Florissant. 



PACHYLOBIUS LeConte. 



A North American genus of only one or two species, confined to th«' 

 Southern states. Three species have been found in our Western 'I'ertiaries, 

 and lu'ing apparentlv peculiar to the Go.siute fauna, may be regarded as 

 one of its tvjjical forms. 



The three species from the Rocky mountain Tertiaries here entered 

 imder Pacliylobius are so placed from the close resemblance of their elytra 

 :ui<l from the structure of the body of the first of them, wliiili aicor<ls well 

 w ifli that of this genus. Here the head, forced beneath the thorax, can 

 mil v l)e seen to have rather large, oval, low-placed eyes, a relatively hmg, 

 moderately stout beak with scrobes running with little obli(|uity to the eyes, 

 a somewhat tumid prothorax hardly if at all longer than broad; the middle 

 coxa; are slightly sejjarated, the hind cox» much further removed from each 

 other, the first abdominal segment sending a triangular process between 

 them; the metasternura has a slight blunt median carina barely flanked by 

 slight carime; the suture separating the first and second abdominal segments 

 is considerably arcuate iu its middle half; the third and fourth abdominal 

 segments are together considerably longer than the mass of the second, and 

 the fifth is relatively .short. Not all of these characters distinguish Pacliy- 

 lobius, so that it is questionable whether the reference can be strictly made. 



Table of the species of Pachylohius. 



Elytral .strhp hardly impressed; ninth stria distinctly punctured deleticim. 



Klytral strise deeply impressed; ninth stria impunctured, or nearly so. 



Elytra less or not more than two and a half times longer than broad; piuictures 



delicate comprcssiis. 



Elytra nearly three times longer than broad; jmnctures coarse, esiiecially at 

 base depradatiis. 



