518 TERTIARY INSECTS OF NORTH AMERICA. 



Besides a sliort humeral stria there are nine others, finely but sharply 

 impressed, with frequent punctures at irregular distances as if they were 

 only a part of those which cover profusely the whole surface. The inter- 

 spaces are 0.375'""' broad in the middle of the elytra, nearly flat, and 

 besides the abundant punctuation are very delicately and sharply rugulose, 

 much as in Cymindis aurora from the same beds. 



Bone caves of Port Kennedy, Pennsylvania. 



CYMINDIS Latreille. 



Cymindis aurora. 

 PI. 1, Fig. 6. 



Cymindis aurora Horn, Trans. Amer. Ent. Soc, V, 243 (1676). 



" Elytra Striae moderately deep, indistinctly punctui'ed, intervals 

 irregularly, biseriately punctulate, and very finely alutaceous. Length, 

 .30 inch; 7.5'"''\ 



"The greater portion of both elytra remain, somewhat distorted by 

 pressure and retaining much of tlie chitinous substance A species is indi- 

 cated closely related to C americana, but somewhat larger. The punctua- 

 tion of the intervals and the arrangement of the striae near the tip, resemble 

 so closely those of Cymindis, that I place the species in that genus." Horn, 

 loc. cit. 



The striae, although very distinct, are really shallow, and are ver}^ 

 indistinctly and somewhat irregularly punctured; the interspaces are 0.25""'" 

 broad in the middle of the elytra, and the surface is very regularly and 

 most delicately and sharply rugulose and furnished abundantly with irreg- 

 ularly scattered, somewhat faint, circular punctures, which can scarcely be 

 said to be arranged biseriately, although they are more frequent along lines 

 which are slightly nearer the striae than the middle of the interspaces, and 

 also to a less extent along the middle line of the interspaces. The length 

 of the chitinous portion of the fragment is G.S"""". The breadth of the 

 elytron and the number of striae can not be determined. 



Bone caves of Port. Kennedy, Pennsylvania. 



PLATYNUS Bonelli. 



The several species of Platynus here described from the interglacial 

 clay beds belong to one type, somewhat distantly represented to-day by 



