3o2 JOHN HAMILTON, M. D. 



30. B. quadrimaculatum Liim., uppositum Say. — All tbe United States and 



Canada; Europe, Algeria, all Siberia. Mots. 2i50. 



31. Tachysnanus Uyll., inornatus Say, picipes Kirby, rivularis Mots. — Abun- 



dant under the bark of dead trees. The United States to Canada and 

 Alaska; Europe, Algeria, the Orient, Siberia. Mots., 238; Col. Am., 

 91; Mann., 1853. 



32. Patrobus septentrionis Dej., hyperboreus Dej., tenuis Lee, longiventris 



Maun., rufipes Lee— To tiiis synonymy Dr. Horn adds, as probable. /os- 

 sifrons Esch. from Unalaschka, Ochotsch and Kanitsehatka; foveocollis 

 Esch. from Unalascbka, Wrangel and ? Barnaul (Gebler) ; obtusiusculus 

 Chaud. from Hudson Bay, and stygicus Chaud. from New Foundland. 

 Heydeu, 25, adds lacusttis Mols., var. rubripennis Thorns, and var. aus- 

 trails Sahib, from Siberia, retaining as a species fossifrons Esch., cinctus 

 Mots. There is likewise some European synonymy: Boreal America 

 from Alaska to Labrador southward to the mountains of New Hamp- 

 shire and to nortlieru Michigan; all Siberia to Kamtschatka, northern 

 and the mountains of central Europe. 



33. Trechus rubens Fab. — Nova Scotia, Ottawa (Canada), Harrington. Siberia, 



northei-n and central Europe. 



34. Pterosticbus panctatissimus Eand., cancellatus Mots., SchrenM Moraw. — 



Maine, Vermont, Massachusetts, New' Hampshire, Lake Superior, 

 Canada, Hudson Bay, LeConte Cat. Arctic Siberia, the Amur, Dauria. 

 Heydeu, 36; Bull. B. v, 39; LeConte Cat. 



35. P. vitreus Dej., MaeMini Lee, oblongopunctatus Geb. (nee F.), orinomum 



Leach, not Kirby.- -Alaska, California, Boreal Europe, western and 

 eastern Siberia to Kamtschatka. Mots., 155; Heyd.:n,35; Bull. B. v. 40. 

 30. P. mandibularis Kirby, brevicornis Kirby, ochoticus Sahl., fastidiosus Kirby. 

 — Alaska to Hudson Bay, and southward to Lake Superior, Vermont 

 and Massachusetts; Arctic Siberia (Ochotsk, the islands at the mouth 

 of the Jenisei and some of its tributaries). Col. Am., 93; Heyden, 35; 

 LeConte Cat. ; Pr. 1873, 315. 



37. P. empetricola Dej., var. fngidus Dej. — Sitka; Keuai ; Hudson Bay Terri- 



tory; var. frigidus occurs on the American side of Behriug Strait, 

 Kamtschatka and the islands at the mouth of the Jenisei. Pr. 1873, 

 315; Heyden, 35; Vega Exp. p. 48. 



38. P. arcticola Chaud., arcticus Sahib., infimus Maek., nou Chaud. — An example 



was taken on the American side of Behring Strait, and several at various 

 places on tlie Asiatic side. Previous occurrence — all northern Siberia 

 and Arctic Europe to Russian Lapland ; Vega Exp. 21 and 48. Heyden, 

 35. 



39. P. confusus Mots., Coleoj). Amur, p. 93 (I860).— ? [Alaska, Menetries].— 



Abundant in the Kurile Islands, Asia, Col. Am. 93. This species first 

 appears on our lists in a synopsis of the genus by Dr. LeConte, Pr. 1873, 

 310; and in the subsequent remarks, p. 315, is the statement, "P. con- 

 fusus, 2 spec. Menetries." Motschulsky described the species from ex- 

 amples from Menetries. If American, the species is as above. 



40. P. quadricoUis Mann., 1 similis Mann. — A single example was taken on the 



Asiatic side of Behring Strait. Previous occurrence— Island of St. 

 George, Alaska; Vega Exp. 17; Mann., 1852 and 1853. 



