52 AMERICAN COLEOPTERA. 



able elsewhere iu the present subgeuus only in fallax and littorulis. 

 From the former it is recognizable by the non-carinate third joint 

 of the antennae, and the prosternum is more attenuate at tip and 

 less broadly rounded. From the latter it is distinguishable only by 

 the slightly longer thorax, which is more deeply emarginate at 

 apex, and by the somewhat paler legs ; all characters of rather 

 doubtful value. 



The basal joint of both the middle and posterior tarsi is grooved 

 on the outer side, and a shorter groove is usually also to be seen on 

 the second joint of both pairs. 



It is very widely distributed, being known to me from Prince 

 Edward Island, Canada, Michigan and the Lake Superior region, 

 Florida, Louisiana, Wyoming, Colorado and from nearly all the 

 States east of the Rocky Mountains, as well as from Oregon, 

 Washington and British Columbia. Mannerheim records it from 

 Alaska. 



37. A. liftoralis Maun. 



Separated fi-om A. imjnincticollis by slight and j)robably insuffi- 

 cient charactei's. In littoralis the thorax is somewhat broader and 

 less deeply emarginate at the apex, and the legs are darker than iu 

 impundicollu. 



In size A. impuncticollis ranges from .28-.40 inch; 7-10 mm.; 

 littoralis from .29-.33 inch ; 7.25-8.25 mm. Amara iinjmncticoilis, 

 as noted above, is widely distributed ; its occurrence in Alaska, 

 however, needs verification. The type of littoralis is from Sitkha 

 and all the specimens known to me are from Alaska. 



38. A. I'allax Lee. — Nearly oval, muderately convex, above feneoiis or 

 iiigro-aineous, surface shining in the males, alutaceoiis in the females. Head 

 slightly uarrovrer than the thorax at apex; anteume shorter than the head and 

 thorax, piceous or rufopiceous, the three basal joints rufous, joints 2-3 carinate 

 above; palpi piceous. Prothorax snbquadrate, impunctate, more than one-half 

 wider than long, widest at base, narrowed from sliglitly in front of the base to 

 apex; apex emarginate; sides rounded from slightly in front of base, margin 

 narrovply reflexed, the posterior puncture about equidistant from the lateral and 

 basal margins; base feebly bisinuous; transverse ini])ressions obsolete; median 

 line fine, abbreviated in front; basal impressions feeble; hind angles rectangu- 

 lar, not carinate. Elytra slightly wider than the thorax, striate; striaj entire, 

 impunctate, the scutellar stria terminating in an ocellate puncture at base, the 

 eiglith witii the row of ocellate punctures rather narrowly interrupted at 

 middle; intervals flat. Body beneath black, impunctate; prosternum broadly 

 rounded at tip. Legs dark piceous or nearly black, the tibite and tarsi usually 



