CARABID.E. 27 



broad as long, with roundly excised anterior margin, truncate posterior 

 margin, and gently convex lateral margins, the broadest part just in front 

 of the middle, and the front angles hardly projecting more than required 

 by the different curves of the trout and lateral margins. Surface smooth, 

 the prothorax with a distinct impressed median line. Elytra with the 

 humeral angle well rounded off, the strisv distinct, but delicate and simple, 

 the interstitial spaces flat and smooth. 



Length of body, 8 mm.; of antenna?, 2.5 mm.; width of elytra, 3.2 mm. 



Florissant, Colorado; twelve specimens, No*. 472, 512, 5486, 7300, 

 7312, 77X4, 8496 and 9277, 9172, 13608, 1361S, 14195, 1433C. 



Named for Maj. J. W. Powell, Director of the United States Geological 

 Survey when this description was written. 



AMARA DAN.E sp. nov. 

 PI. II. tio's. 8, 10, 11. 



This largest and most abundant of the Florissant species of Amara 

 seems most to resemble A. califorulm Dej., and differs from A. powi'U'ii 

 mainly in its greater slenderness; its head is relatively smaller, and the 

 greatest width of its thorax appears to be in the middle rather than in front 

 of it; the elytra have more nearly parallel sides and the humeral angle is 

 less rounded off. Like it the head is broad and the eyes placed well for- 

 ward, and not protuberant; the elytra! stria? are delicately impressed, 

 the interstitial spaces flat and smooth, and the prothorax has a delicately 

 impressed median line. 



Length of body, 13 to 14 mm.; of antennae, 2.5 mm.: width of elytra, 

 3.5 mm. 



Florissant, Colorado; fifteen specimens, Nos. 419, 1(44, 5119, 7099, 

 7371, 8089, 8492, S517, s<;<)7 and 8X67, 1110S, 1120-2 and 141G6, 12019, 

 13020, and of the Princeton College collection Xos. 1.555, 1.614. 



In memory of the distinguished geologist J. D. Dana. 



CARABITES Heer. 



This term was employed by Heer to cover fossil Carabida? of uncertain 

 position, and under it I have placed the first of the following species, from 

 Utah, which is probably one of the Pterostichini. The second species was 



