26 TERTIARY COLEOPTEKA OF XORTH AMERICA. 



joints. The head is not so broad in proportion to its length as in the other 

 Florissant species, but on the other hand the thorax is broader, being more 

 than twice as broad as long and exceptionally broad in front, where the front 

 angles are not produced forward; the front margin is scarcely concave, the 

 outer margin gently convex, with the height of the curve rather in advance 

 of the middle; there is the usual impressed median line. The elytra are no 

 broader than the thorax, with scarcely rounded humeral angles and stria' 

 as in the other species. 



Length of body, 5 mm.; of antenna?, l.f> mm.; breadth of elytra, 

 2.25 mm. 



Florissant, < 'olorado; four specimens, Xos. (i226, 6i70, 70(jO, and of 

 the Princeton collection. No. 1.511. 



AMAKA VETERATA sp. nov. 

 PL II. lijr. 3. 



A number of specimens, none of them very completely preserved, 

 represent a species intermediate in size between A. 2>oicclHi and A. daita- on 

 one side and .1. rmictit/i and A. sterilix on the other. It has a more regularly 

 oval shape than A. i/ai/n; to which it is on the whole the most nearly allied, 

 but the form of the head and thorax is almost exactly as there. The elytra 

 have fuller sides than even in A. jin/rrl/ii, with the humeral angle as in A. 

 /lini/c. None of the specimens show the elytra! strife with sufficient distinct- 

 ness for characterization, but they are evidently similar to those of the 

 other species. Fvcepting in one specimen there is no distinct sign of' a 

 median impressed line on the proiiotum, and in this case it is very slight. 



Length of body, 7.75mm.; width, 3.4mm. 



Florissant, (.'olorado; live specimens, Xos. 414, 10S11, 11271, 12055, 

 14135. 



A.MARA POWKLIJI Sp. llov. 

 1>1. II, liu-s. L>. 5. 



This species is represented by a number of tolerably good specimens 

 ivMMiibling A. iii//iin/(/ir<>//i* Say in size. The head is unusuallv broad 

 for its length, the portion back of the base of the mandibles being fullv 

 half as broad again as long; the eyes are small, placed well forward, and 

 jjobular, though not greatly protruding. The prothorax is about twice as 



