AM A RI ISLE 225 



nating methods of certain earlier auth6rs, although this was largely 

 contributive, but is principally due to very extensive fresh material 

 which has been rendered available through the kindness of many 

 friends, and particularly Mr. John D. Sherman, Jr., who secured 

 remarkable series of many species in the almost inexhaustible re- 

 gions about Lake Superior. Messrs. Shoemaker and Schott of 

 New York, Prof. Wickham and others, have also aided materially. 

 The Levette collection furnished a large and varied assortment of 

 western species and a goodly number were captured by myself 

 from time to time. 



I do not think there can be very serious doubt that the groups 

 of the subfamily denned and named by Zimmermann, should be 

 considered distinct genera and not in the nature of subgenera, for 

 each is characterized by its own peculiarities of facies, which be- 

 come more and more apparent through prolonged observation and 

 comparative study, and I therefore advocate their retention as 

 valid genera. These genera, so far at least as our own fauna is 

 concerned, may be outlined in few words as follows: 



Terminal spur of the anterior tibiae simple 2 



Terminal spur trifid equally in both sexes; posterior male tibiae pubescent 



within 12 



2 Prosternal process iinmargined, not setose; prothorax widest before 



the base; hind tibiae not pubescent internally in the male 3 



Prosternal process margined 7 



3- Body elongate, somewhat as in Pterostichns 4 



Body shorter and stouter; middle tibiae not internally dentate in the 



male 6 



4 Antennae thickest medially, tapering thence to base and apex; tarsi 

 thick; thoracic base transverse and straight; middle male tibiae not 

 or but vestigially dentate within; body less slender; habitat south- 

 ern Feronalius 



Antennae filiform; body much more slender. . . 5 



5 Antennae and tarsi slender; frontal sulci short, never prolonged upon 

 the epistoma; thoracic base sinuate either throughout or laterally; 

 middle male tibiae grooved or flattened internally and bi- or tridentate 

 on the inner edge distally; habitat arctic or subarctic. . .Curtonotus 

 Antennae notably thick, gradually flattened distally as usual, the tarsi 

 thicker than in Curtonotus; frontal sulci long, deep, sometimes in- 

 vading the epistoma; thoracic base not sinuate, rounded laterally; 

 middle male tibiae obsoletely bisinuate within; habitat as in the pre- 

 ceding Stereocerus 



6 Frontal sulci small; last palpal joint more swollen than usual, acumi- 

 nate distally; thoracic base truncate, becoming oblique laterally; 

 T. L. Casey, Mem. Col. VIII, Oct. 1918. 



