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North American Coleopterous Insects. 161 



cantonment of Major Long's party near Council Bluff on 

 the Missouri river. It occurs also in Indiana and Penn-" 



r 



sylvania. 



By the form of the tarsi, palpi and thorax, it approaches 

 the present genus ; but the extraordinary conformation of 



ation 



speciesj at least in a distinct subgenus. 



It varies in having the rufous thoracic margin very 

 narrow, and even interrupted on the lateral margin. 



Priocera, Kirby. 



P. inomdta. Black-piceous ; antennae and palpi yel- 

 lowish ; maxillary palpi with the last joint rather small. 

 . Inhab. Indiana. 



' Body elongated, blackish-piceous, with pale hairs, 

 punctured : heady punctures somewhat confluent, so as to 

 present a rather granulated appearance : antennce honey- 

 yellow, terminal joint hardly larger than the preceding • 

 one : labrum piceous, obtusely emarginate : mandibles 

 piceous at base : maxillary palpi with the terminal joint 

 small : thorax with an obtuse tubercle each side of the 

 middle, on which is an indentation ; an impressed, trans- 

 verse line before the middle and a contraction behind the 

 middle ; an indentation on the basal margin ; punctures 

 not profound, transversely confluent : elytra with deeply 

 punctured striae : cox(E and tarn honey-yellow. 



Length two fifths of an inch. 



This species agrees with all the characters of the pre- 

 sent genus, as laid down by Kirby, with the exception of 

 the magnitude of the terminal joint of the maxillary 

 palpi, which is much smaller than that of the type of the 

 genus. It is rare. 



