358 JOHN HAMILTON, M. D. 



Kansas, Alaska. Germany. Sweden. Finland to 69°. Kanitscliatka, 

 the northern tributaries of Jenisei, southwestern part of western Siberia. 

 Kirby, 72; T. iv, 411; T. x, 279; Sharp, 556; Heydeu, 57. 



87. I. fulig-inosus Fab. —North America {fide Sharp). Central and northern 



Europe to 64° in Finland. Southeastern west Siberia. Sharp, 556; 

 Heyden, 57. 



88. Agabus (Gaurodytes) cong-ener Payk., amhiguus Say, discolor Harris (T. 



X. 278), var. lapponicus Sahib. — Thus constructed the range of this spe- 

 cies is Missouri, Pennsylvania, Massachusetts, Labrador (Caribou Island, 

 Packard), Greenland, Hudson Bay, White Mountains, N. H. Central 

 and northern Europe. Arctic and western Siberia. Sharp, 512; Hey- 

 den, 56. " A variable species," Sharp. 



89. A. nigripalpis Sahib. (1880), dissimiUs \\ Sahib., borealis Sharp. — Alaska, 



Wickham; Greenland, Labrador, Stupart's Bay and Cape Digges, Hud- 

 son's Strait (Horn Cat.), Lake Superior. Europe, Jenisseisk, Dudinka. 

 various places at the mouth of the Jenisei. Heyden, 56. Doubtfully 

 distinct from congener. Sharp, p. 513. 



90. A. conflnis Gyll., bicolor, phseopterus Kirby, ovoideus Crotch (T. x, 278). — 



Kansas, Lake Superior (LeCoute), Michigan (Schwarz), Canada (Pettit), 

 Vermont, Hudson Bay (Kirby). Alaska. Sweden; Finland to 68°. 

 West Siberia. T. iv, 418; Sharp, 520; Heyden. 56. 



91. A. arcticus Payk., reticulatus Kirby, var. sibiricus Sahib. — Taken at 65° 



north latitude (Kirby), Labrador (LeConte), northern Europe to 69° in 

 Finland. Arctic Siberia (the Dudinka). T. v, 422: Sharp, 526; Hey- 

 den, 56. 



92. A. nigroseneus Er., Erichsoni Harold, lutosus Cr. (T. x, 279). — California, 



Kansas, Slave Lake, Lake Superior, Canada, Hudson Bay, central and 

 northern Europe. Siberia (the islands and affluents of the Jenisei). 

 T. v, 419; Sharp, 529; Heyden, 56. 



93. A. tristis Aube, var. dnbius Mann., ? ntratns Mann. — Occurs in New Mexico 



(Snow); Colorado (Schwarz) ; Lake Tahoe, California; Alaska; Caiiada 

 (Quebec), Arctic Siberia (the Dudinka). T. iv, 422; Sharp, 531; Hey- 

 den. "This species varies a good deal in color," Sharp. 



94. Khantus notatus Fab., suturalis Lac, sericans Sharp (T. x, 279). This 



species has been found in Kansas (Snow, LeConte), Montana (LeC!onte), 

 British Columbia. Europe; western Siberia. Pr. 1866, 366; Sharp, 

 619; Heyden, 57; Nord., 22. 



95. R. bistriatus Berg., agilis Payk., suturellus Harr. — Massachusetts, Illinois, 



Kansas, Lake Superior. Slave Lake, Hudson Bay. Central and northein 

 Europe; eastern and western Siberia. T. iv, 409; Sharp, 620; Heyden, 

 57 (suturellus Harris). Adspersus Fab., is not a synonym of bistriatus 

 Berg., Sharp. 

 The synonymy of this and the preceding species gives the Europeans trouble ; 

 suturalis is given precedence in the former, and suturellus in the latter 

 bj' Mr. Fauvel, Rev. 103. Some other American and Eastern forms if 

 not identical seem very close, viz., sinuatus Lee. and Grapii Gyll. scarcely 

 differ, except that the latter is a little larger (Sharp, 617). 



96. Colymbetes Paykulli Er. — No reference to this species has been observed 



in our literature. Dr. Sharp (625) gives as its habitat "western North 

 America," north Geru)any, Sweden, Finland to 68° 30', Arctic Siberia 



