r.VRABIIXE. 25 



shorter than tin- penultimate, indeed scarcely more than half as long, 

 squarely truncate. Only about half a dozen joints of the antennas are pre- 

 served, of which the basal is not more than half as long- as in I'], gravidus, 

 while the other joints are as there. 



Breadth of head at the eyes, 3.lT) mm. 



Florissant, Colorado; one specimen, No. 1899. 



AMARA Bonelli. 



This is a genus numerous in species, mostly confined to the north tem- 

 perate zone, and of which over sixty are found in North America. Three 

 existing species have been found in the Pleistocene of Germany and Bavaria, 

 and two extinct species in that of Gralicia. Besides these, two undescribed 

 species are recognized by Forster in the older Tertiaries of Alsatia, and 

 three are described bv Heer from Oeninaren; to these are to be added the 



>/ 



five Florissant species. 



The Florissant species referred here differ from existing forms in several 

 particulars, but I can not find that they agree better with any other types. 

 They are remarkable for the shortness of the thorax, the breadth of the 

 head, and the small size and anterior position of the eyes, which are next 

 the antenna? and removed as far as possible from the border of the thorax. 



AMARA REVOCATA sp. nov. 

 PI. II. tig. 6. 



Agrees well in general appearance, in size, and in form with A. angustnta 

 Say of the Northern States. It is smooth throughout, the thorax nearly 

 twice as broad as long, with well-rounded slightly produced front angles, 

 gently convex lateral margins, and a slight median impressed line. Elytra 

 smooth, with gently impressed simple stria 1 and flat interstitial spaces. 



Length of body, 6.5 mm.; breadth of elytra, 2.4 mm. 



Florissant, Colorado; one specimen, No. 10404. 



AMARA STERILIS sp. nov. 

 PI. II, figs. 1, ;. 



Another species, most nearly resembling A. diirata Dej., but much 

 smaller, occurs at Florissant. It is the smallest species found there and is 

 remarkable for its short and broad thorax and the shortness of the antennal 



