434 TERTIARY INSECTS OF NORTH AMERICA. 



which considerably surpasses the apex of the front ; the second and third 

 joints of antenna? of equal diameter and very slender, the last joint a little 

 incrassated ; surface of head densely and finely punctate. Thorax trape- 

 zoidal, narrowing rapidly, punctate like the head. Hemelytra more coarsely 

 punctate along the veins of the .corium, which reaches barely beyond the 

 middle of the abdomen and is infuscated, while the membrane is nearly 

 clear. Abdomen oval, the sides slightly ampliated. The figure on Plate 26 

 poorly represents the species. 



Length, 7.3 mm ; antenna?, 4.1"""; breadth of thorax, 2 mm ; abdomen, 

 2.65"' m 



Florissant. Four specimens, Nos. 3247, 5715, 8544, 14207. 



3. CORIZUS SOMNURNUS. 



Body very slender, being nearly four times as long as broad, the sides 

 parallel. Head rounded, subtriangular, scarcely broader than the apex of 

 the thorax, fully as long as broad, the surface punctate. The antennae 

 very long and slender, the first joint clearly surpassing the apex of the 

 front. Thorax nearly twice as broad as long, tapering gently, with 

 scarcely ampliated sides, the front margin broadly, roundly, and deeply 

 emarginate, the apex fully two-thirds as long as the base ; surface punctate. 

 Hemelytra as in the preceding species, but the membrane distinctly infu- 

 mated. Legs long and slender, the hind femora with a very slight posterior 

 fringe of minute short denticulations, on which account one would be 

 inclined to place it in Harmostes, but the denticulations do not take on the 

 form of spines, but are more like serrations. 



Length, including the closed hemelytra, 5.5 mm ; antenna?, 4 mm ; hind 

 femora, 2.4 mm ; breadth of body, 1.8 mm . 



Florissant. One specimen, No. 14193. 



4. CORIZUS GUTTATUS. 



PI. 7, Fig. 11. 



Redurius? gxttatiis Scudd., Bull. U. S. Geol. Geogr. Surv. Terr., IV, 771 (1878). 



Two specimens of this species have been found, one with reverse, by 

 Mr. Richardson, the other by myself. Mr. Richardson's specimen is very 

 obscure and distorted, and without the aid of the other could not have been 

 determined. The insect probably belongs to Corizus, or at all events falls 

 in its immediate vicinity. All parts are rather obscure, but the head evi- 



