536 TERTIARY INSECTS OF NORTH AMERICA. 



rather shallow, and with scarcely the slightest sign of any uncertainty of 

 direction or waviness of course such as is common in the Carabini; nor do 

 they combine and divide, but are equidistant and parallel throughout, the 

 interspaces smooth and not imbricated. 



Length of body to tip of mandibles, 1 l mm ; length of head from posterior 

 edge of eyes to front of clypeus, 1.25 mm ; of prothorax, 2.15 mm ; of elytra, 

 7 mm ; width of head between the eyes, 1.7 mm ; of prothorax in front, 2.75 mm ; 

 at widest, 3.5 mm ; at base, 2.5 mm ; of elytra, 4.8 mm . 



Green River, Wyoming. Two specimens, Nos. 24 (L. A. Lee), 4059 

 and 4100 (S. H. Scudder). 



CYCHRUS Fabricius. 



CYCHRUS WHEATLEYI. 

 PL 1, Fig. 1. 



Cychrtis wheatleyi Horn, Trans. Amer. Ent. Soc., V, 242 (1876). 



" Of this species I have before me a flattened thorax, all the actual sub- 

 stance of the upper surface being present in moderately good preservation, 

 and the large portion of a left elytron of which but a small portion of the 

 substance remains. 



" The thorax although flattened bears evidence of having the disk 

 moderately convex, the median line distinct, the transverse basal impression 

 rather deep and the lateral margins broad, wider at base and reflexed. The 

 hind angles are obtuse and not prolonged, the base being moderately eniar- 

 ginate. The sides are moderately arcuate and gradually narrowed toward 

 the base, the widest portion of the thorax being slightly in front of the mid- 

 dle. A species is thus indicated resembling viduus but smaller, not exceed- 

 ing in size the average specimens of andrewsii. 



" The elytra are finely striate, the intervals moderately convex and 

 apparently smooth, the striae with moderate punctures not as closely placed 

 as in any species on this side of the continent. The striae are as numerous 

 as in viduus or andrewsii. 



"Thorax. Width, .24 inch, .6 mm ; length, .16 inch; 4 mm . 



"Elytra (restored). Width, .48 inch; 12 mm . Length, .66 inch; 16.5 mm . 



Bone caves of Port Kennedy, Pennsylvania. 



"I think there is very little doubt of the distinctness of this species 



