10 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 66 



Green Kiver Eocene; head of East Alkali Creek, about 8 miles 

 south of DeBeque, Colorado (John P. Byram, 1922). 



Holotype.—Q^X. No. 69614, U.S.N.M. 



The broad thorax, with convex sides and the elytra without evi- 

 dent punctures at once separate this from C . hraxinii Heer, from the 

 Miocene of Oeningen. Among the Florissant (Miocene) species, it 

 is perhaps nearest to C. lithogra/phus Wicldiam, but the hind coxal 

 plates are differently shaped. This is much the oldest known 

 Cardiophorus. 



Family SCARABAEIDAE 



MELOLONTHITES AVUS Cockerell 



A sj)ecimen about 11.5 mm. long was found by John P. Byram at 

 our Station 10, which is a large excavation a short distance up the 

 Ute trail from Station 1, in the Roan Mountains, Colorado. The 

 clypeus is emarginate but not at all bidentate; the eyes are deeply 

 emarginate, the elytra are strongly convex outwardly, and the hind 

 spurs are very strongly curved. The insect is quite modern in ap- 

 pearance and may, I think, be termed Phyllophaga avus, though the 

 protuberance on the outer side of the hind tibiae is very indistinct. 



HEMIPTERA 

 Family CIXIIDAE 



EOLIARUS, new genus 



Resembling the modern genus Oliarus Stal, both in form and the 

 spotting of the wings, but the radius branches at an acute angle a 

 considerable distance before the large stigmatic spot, the upper divi- 

 sion (R) proceeding very obliquely to the margin, traversing the 

 upper part of the spot; the lower division (radial sector) emitting 

 four very oblique branches above (as in the Mesozoic Mesocixoides 

 of Tillyard), the first traversing the stigmatic spot, the second 

 arising at its outer lower corner, the fourth traversing the upper 

 part of the apical spot; media branching beyond level of forking 

 of radius, its fork more open, the upper branch soon connected with 

 the radial sector by a vertical cross- vein, and later forking at an 

 acute angle, its ujoper division again forking at the level of the last 

 branch of radial sector; cubitus forking at same vertical level as 

 radius; hind wings with cross- veins beyond the bases of apical forks; 

 body very stout, brown, pallid in scutellar region, abdomen distinctly 

 branded. 



Type of the genus. — Eoliarus quadristictus, new species. 



