360 JOHN HAMILTON, M. D. 



Ireland, western Siher:a; var. borealis occurs iu the Amur rejrion. Hey- 

 deu. 58. 



106. Graphoderes cinereus Linn., fasciatocoUis Harris, elatiis, perplezits Sharp 



(T. X, 280). — Inhabits Pennsylvania (here), New York, Massachusetts, 

 Michigan, Missouri, northern California, Washington Territory, Eed 

 River. [Manitoba]. Europe. West Siberia. Turkestan. T. iv, 403; 

 Can. Ent. xx, 62; Sharp, 693-94; Heyden, 59. 



GYRINID^. 



107. Gyrinus minutus Fab. — Square Island, Labrador, Packard; Hudson Bay 



region, Kirby ; Lake Superior, Michigan, Vermont, Washington, Oregon. 

 Central and northern Europe. Arctic, west and east Siberia (Spiriua, 

 the Chantaika River, Omsk). Pr. 1868, 372; Heyden, 60. 

 Obs. — G. Rockinghamensis Zimm. seems to ditfer only by having the under- 

 side entir.ly pallid, but is approached in this respect so closely by indi- 

 viduals o( viinutus as to render the separation opinionative. It is abun- 

 dant from New York to Florida. 



108. Gyrinus marinus Gyll. var. dorsaZis Gyll. — United States, without locality. 



Regimbart. Europe, Siberia generally ; va.r. dorsalis. Europe, Irkutsk 

 (eastern Siberia). Heyden, 60. 



109. G. opacus Sahib. — Greenland. Finland, Denmark, England, Dudinka, 



Tol.sloinos and Saostrov, in Arctic Siberia. Heyden, 60. 



HYDROPHILID-S]. 

 Obs. — Helophorus g-ranularis Linn, is to be expunged from our lists hav- 

 ing only a catalogue ret^ord iu our literature. 



110. Helophorus tuberculatus Gyll., scaber Lee. — Very abundant at Lake 



Superior, LeCoute. New York, Canada, Michigan, Wisconsin, Missouri, 

 Washington, Wickham. Germany, northern Europe. Siberia (the Obi 

 and Jenisei). Mongolia. P. vii, 358; Heyden, 61. 

 Obs. — Tropisternus apicipalpis Chev. is to be expunged, the record of 

 its occurrence in Eui'ope having been an error. 



111. Hydrobius fuscipes Linn., seriatus, insculptus, regularis Lee. (P. vii. 372). 



— Very variable and widely distributed in temperate and boreal America. 

 Alaska to Hudson Bay, southward to California; through the Rocky 

 Mountains to New Mexico. Oti the Atlantic slope it extends south to 

 Maryland and West Virginia, from which I have specimens. General 

 in Hlurope. Kamtschatka, east and west Siberia, Turkestan. P. Am. P. 

 xiii, 135; Heyden, 62. 

 Obs. — The Sphjeridiini of North America have recently been exhaustively 

 studied by Dr. Geo. H. Horn, and the American distribution of the spe- 

 cies tabulated is largely from his monograph, his synonymy being like- 

 wise followed. 



112. Sphseridium scarabeeoides Linn. — Common about Montreal, Canada; 



Ent. News iv, 76. It is quite common in several varieties throughout 

 Europe, and is found in many pla(;es in ea.^t and west Siberia, and in 

 Tiircomania. Heyden, 93; Heyden. 1885. 



113. Dactylosternum abdominale Fab., lioussetti WoU. , insulare Ci\st. (Lapl.), 



( /}. hisulare Lap., aMomhiale WoU. not Fab., Cat. ivj.—" Florida, North 

 Carolina. Native to Brazil, whence it has spread to the Antilles and 



