94 JOHN HAMILTON, M. D. 



20. B. undulatuni Sturm., dentellum Thimb. 



I take this species abundantly in swampy places, where there is 

 grass and rubbish. It also occurs in Alaska, Mann., 1853; Can. 

 Ent. XX, 61. Europe. Western Siberia. Mots., 269 ; Heyden, 51. 



21. B. assimile (ryll., frontale Lee. 



Taken abundantly with the pi-eceding. This species extends from 

 Florida to New Mexico, and northward to Lake Superior. Europe. 

 West Siberia. An. Lye. 462 ; Can. Ent. xx, 61 ; Mots., 263. 



22. B. quadrimaculatum Lin., oppositus Say. 



This species occurs abundantly nearly every place in the United 

 States and Canada. Europe. Arctic and all Siberia. Mots., 250. 



23. Tachys nanus Gyll., inornntus Say, Tachyta picipes Kirby. 



Found abundantly under the bark of dead trees throughout the 

 United States and Canada, likewise in Europe and Siberia. Mots., 

 238; Col. Am., 91. 



24. Patrobus septentrionis I)ej., tennis, rufipes Lee, hyperboreus Dej., lon- 

 giventris Mann., ? fossifrotis Esch., ? foveicoUis Esch. (Unalaschka), ? obtusiusculus 

 Chaud. (Hudson Bay), f stygicus Chd. (New Fouudland), lacustris Mots. 



This species inhabits Arctic America and southward to northern 

 Michigan and Mt. Washington, N. H. A certain amount of local 

 variation has caused much synonymy. Arctic and the mountains 

 of central Europe. W. and E. Siberia ; fosslfrons Esch. = cinduii 

 Mots., inhabits Kamtschatka and Ochotsk. T. v, 130 and 248 ; Mots., 

 130; Col. Am., 91 ; Heyden, 2-5. 



25. Trechus rubens Fab. 



Occurs in Nova Scotia and northern Europe T. v, 131. Ottowa, 

 Canada, Harrington in lit. 



26. Pterostichus punctatissimua Rand., cancellatns Mots., Schrenki Mora- 

 witz. 



This fine species occurs from Maine to Hudson Bay and westward 



(Massachusetts, New Hampshire, Lake Superior, Canada, Hudson 



Bay, LeConte Cat.). Arctic Siberia, the Amur, Dauria. Heyden, 36 ; 



Bull. B. V, 39 ; LeConte Cat. 



27. P. vitreus Dej., MaeMini Lee, oblongopiinctatus Geb. (nee F.) 

 Inhabits Alaska and California. Boreal Europe. W. and E. Siberia 



to Kamtschatka. Mots., 155 ; Heyden, 35 ; Bull. B. v, 40. 



28. P. mandibularis Kirby, ochoticiis Sahl., fnstidiosus Maun. 



This species is spread from Alaska to Hudson Bay, and southward 

 to Lake Superior, Vermont and Massachusetts. Arctic Siberia 



