38 AMERICAN COLEOPTERA. 



with the true pubescence observable iu exarata, in spite of the fact 

 that this is less dense in the last named species than in most Bradyti. 

 Specimens are known to me from Nova Scotia, New Brunswick, 

 Canada, all the New England States, New York, New Jersey, Penn- 

 sylvania, the mountains of southwestern Virginia, Michigan, Iowa, 

 Illinois, the north shore of Lake Superior, Manitoba and Colorado. 



Subgenus BRAI>YTUS Zimni. 



Prothorax wider in front of base. Prosternum margined at tip. 

 Anterior tibiie with the apical spur simple. Males with the middle 

 tibise not dentate on the inner side. Posterior tibiae distinctly, 

 usually densely pubescent on the inner side in the males. 

 ' Distinct from all the subgenera, except Amara s. s. and Trkenn, 

 by the posterior tibise distinctly pubescent on the inner side in the 

 males, while from the two latter it is at once distinguishable by the 

 form of the prothorax. From Cyrtonotus and Leironotus it differs in 

 having the prosternum margined at tip, while it resembles them in 

 having the thorax distinctly wider in front of base. With all but 

 Cyrtonotus it agrees in having the middle tibise not dentate within 

 in the males, and with all except TrUetia by the apical spur of the 

 anterior tibite not trifid. 



The inales of all our species in which that sex is known to me, 

 in addition to the secondary character above mentioned, have the 

 anterior tarsi dilated and one anal seta each side, two being present 

 in the females. A secondary sexual character of some importance 

 in classification is also to be observed on the prosternum of several 

 species. This consists of an impression varying from a deep fovea 

 to a shallow punctured area or groove. In at least one species it is 

 entirely wanting. 



Our species agree in having all the femora normally bisetose 

 along the inner margin. They may thus be separated : 



Scutellar stria long 2. 



Scutellar stria very sliort or obsolete ; form convex ; nietasternal epistenia punc- 

 tured ; males with a shallow oval space, with a few small punctures at 

 middle of prosternum. Length .30-.40 inch 22. exarata Dej. 



2. Prosternal side pieces impunctate 3. 



Prosternal side pieces punctate; nietasternal episterna jiunctured. 

 Viridi, or cupreo-teneous ; prothorax nearly twice as wide as long, punctate 

 at base, sides and apex, distinctly emarginate at ajiex ; basal impres- 

 sions feebly bifoveate; prosternum simj)le in both sexes. Length 

 .2o-.32 inch 23. glacialis Maun. 



