DISTRIBU'J'ION OF COLEOPTKRA. 359 



(Fadjiinovvsk). "Excessively near semiiiiger Lee, imeqnalis Horn;" 

 Horn in litt. Saskatchewan River, B. C. Snsanville, Cal. 

 C. obncnratus Mann, is possibly identical, the chief difference being that the 

 transverse striolse of tlie elytra are somewhat finer and denser (com- 

 parison by jMannerheim, 185;{), quite a secondary character. 



97. Colymbetes dolobratus Payk., Cat. iv.— Occurs in the island of Kadiak 



and the Peninsula of Kenai, Mann. 1853; Hudson Bay, Lapland, islands 

 at the mouth of the Jeuisei and its Arctic tributaries, Kamtschatka. 

 Heydeii, 58. 



98. C. groenlandicus Aube, Thomsoni Sharp, Cat. iv.— Dr. Eeginibart (Ann. 



Soc. Ent. France, 1889, 12, xviiij uniting this and the preceding species 

 gives the following distribution : 

 C dolobratus Payk., Hudson Bay, Lapland, Finland, Sweden, Norway. 

 Var. groenlandicus Aube, Labrador, Greenland, Iceland. Var. Drewseui 

 LeConte. Greenland. Var. Thomsoni Sharp, Iceland, Lapland. 



99. Eretes (Eunectes), sticticus I^inn., griseus Fab.— More extensively dis- 



tributed than any known Dytiscide. Sharp gives its distribution as 

 follows: " Fra!jce, Corsica, Sardinia, Spain, Africa, Siberia, Japan, For- 

 mosa, China, Philippines, Timor, Sumatra, Java. Pulo Peuang, Siani, 

 India, Arabia, Mesopotamia, Canary Islands, Madeira, Cape Verd Is- 

 lands, U. S. N. A., Mexico, Peru, Giiadaloupe, Galapagos. Australia may, 

 perhaps, bo added. It is not known at many places in the IJ. S. A., but 

 occurs in Kansas (Snow), Texas, New Mexico, and at Vallecitas, Cal. 

 T. iv, 386; Sharp, 699; Turcomania. Heyden, 58. 



100. Hydaticus stag-nalis Fab., cinctipennis Aube, modestus Sharp, americamis 



Sharp (T. x. 280).— As thus constructed this species varies in color or- 

 namentation. It occurs in New York. Michigan, Illinois. My speci- 

 mens (modestus) are from Wisconsin ; Red River, Sharp. Northern Eu- 

 rope ; western Siberia. T. iv, 404; Sharp, 650-52. Heyden, 50. 



101. H. Isevipenis Thom.— Red River [Manitoba], Sweden, Finland to 60° 30'. 



Dr. Sliarp, 1. c. doubts the distinciness of this and H. stagnalis, while 

 Mr. A. Fauvel atBrms their validity as species. Rev. Ent. viii, 104. 



102. Dytiscus marg'inalis Linn.— CJanada and northern Michigan. Dr. Sharp 



has a specimen labeled by Castelnau " Am. Bor. int. mont. rocheuses," 

 and found another in Murray's collection said to be from North America 

 Widely distributed in Europe to 68°. W. and E. Siberia. Japan. Shf.rp . 

 641 ; H;-yden, 58. 



103. D. clrcumcinctus Ahr., circumscriptus Lac. — Dr. Sharp had specimens 



from Red River, [Manitoba]. Europe to 61° 51' north, in Finland. 

 Northern Siberia. Sharp, 642; Heyden, 58. D. awa;ws Maun, is possibly 

 synonymous. It occurs in Oregon and Sitka. T. iv,408; also in Canada 

 and Hudson Bay region. Horn, in litt. 



104. D. dauricus Gebl., confluens Ssiy , Franklinii Kirby. Ooli gbukii Kiihy, dif 



finis Lee— From Maine to Alaska (Maine, Hudson Bay (LeConte Cat.), 

 Great Bear Lake River, Lake Superior, Michigan, Wisconsin, Kansas, 

 Colorado (Pagosa), Una'.aschka, Kadjak, Kenai. Kamtschatka; Dauria. 

 T. iv, 407; P. 1868, 370-72; Sharp. 643; Heyden. 58. 



105. D. lapponicus Gyll., var. borealis Mots. — This species was taken by Dr. 



P.oll in the Oba and Kaibaraca Rivers near lat. 49°, long. 84°; Lee. Cat. 

 Lapland, northern Europe, southward to northern Italy. Scotland, 



TRANS. AM. ENT. soc. XXI. OCTOBER 1894. 



