PTINID^E— SCARAB^EID^E. 103 



AnOBIUM ? DECEPTUM. 



AnoUum deceptmn Scudd.. Bull. U. S. Geol. Geogr. Surv. Terr., IV. 763 (1878); Tert. 

 Ins. N. A., 492. pi. 8, fig. 18 (1890). 



Green River, Wyoming. 



Anobium lignitum. 



Anobium lignitum Scudd., Bull. U. S. Geol. Geogr. Surv. Terr., IV, 763 (1878); Tert. 

 Ins. N. A., -192-1:93, pi. 8, fig. 24 (1890). 



Grreen River, Wyoming. 



Anobium durescens. 

 Anobium cbtrescens Scudd., Tert. rhynch. Col. U. S.. pi. 1. fig. 19 (1892). 



Head, as usual in Anobium, bent downward, the front poorly preserved 

 in the single specimen, the surface rather coarsely and rather distantly 

 punctate, the eyes moderately lai-ge, circular, lying next the edge of the 

 emarginate prothorax. Prothorax bullate and hood-like, the front border 

 with strongly emai-ginate sides, the surface punctate exactly as that of the 

 head. Elytra very regularly arched, elongate, with heavily and sharply 

 impressed, deeply punctured strife, the puncta longitudinal and usually 

 separated by about half the length of one of them. 



Length, 3.5 mm.; breadth, 1.25 mm. 



Florissant, Colorado; one specimen, No. 13627. 



Seventy-seven species of fossil Scarabajidse have bfen discovered, of 

 which sixteen are from the Pleistocene, and of the latter, half are regarded 

 as identical with li\aug forms. Thirty-two genera are represented, seven of 

 them in the Pleistocene, though onh" two of them in the Pleistocene only. 

 Three genera from the older Tertiaries are extinct types. 



CHCERIDIUM Lepelletier. 



An American genus with only two s^Decies in the United States, but 

 manv in the Tropics. A single fossil species is known from the Pleistocene 

 of Pennsylvania. 



