98 JOHN HAMILTON, M. D. 



50. Miscodera arctica Pm/k.. evythropns Mots. (Mots. 76: described and 

 figured) americnna Mann., Hnrdyi Chaud. 



This species occurs in the northern parts of America from Ahiska 

 to New Foundhmd. Northern Michigan, Schwdrz. Horn writes of 

 the various names (T. ix, 168) : " It is all one species varying in size 

 and brilliancy of surface in the different localities." Europe (the 

 mountains of Britain, the Alps, Boreal Europe). Eastern Siberia, 

 the Anuir. Heyden, 24; Col. Am. 91. 



51. Stenolophus ochropezus Say, limbatiis Mann., covvcticollis Lee, yrncilis 

 Casey. 



This species extends from Arizona to the Atlantic, and north to 

 Canada. I have specimens from New Mexico and Colorado. In 

 many places it is abundant. Lhnbatns occurs in Kamtschatka. Bull. 

 B. vi, 15; Heyden, 47. 



52. Bradycellus cognatus GylL, Deufschii Sahib., nifens Lee, axillaris, lon- 

 giusculus Mann. 



This insect occurs in North America in widely separated localities 

 (San Diego, Calif., LeConte; Mt. Washington, N. H., Austin; Nova 

 Scotia, Harrington, in lit. Northern Michigan and Lake Superior, 

 Sclmmrz ; Alaska, Sitka. Arctic Siberia. Arctic Europe, Britain, 

 Germany. Pr. 1868, 380; Heyden, 42. 



HALIPLID^. 



.53. Haliplus ruflcollis DeG., impressus J Kirby, immaculicoliis Harris. 



This species has a wide distribution. From the Southern and 

 ^Middle States, northwai-d through Canada to Hudson Bay and west- 

 ward to New Mexico and the Rocky Mountains. General in Europe, 

 passing over to Turkestan and western Siberia. T. iv, 385 ; Kirby, 

 ()Q ; Heyden, 53. 



DYTISCID^.. 



O/w.— Hydro vatus cuspidafcus Kniise. 



Dr. Sharp says that the species known by this name in our litera- 

 ture \ii pustuhttas Mels., and not the true cuspidatas. Sharp, 323. 



54. Coelambus insequalis Fab., punctdtus Say. 



This s})ecies is a little variable in color ornamentation. It occurs 

 here abundantly and generally throughout the Middle and Western 

 States (Buffalo, N. Y. ; Ottawa, Canada; Lake Superior, Michigan, 

 Ohio, Illinois, Kansas, Colorado). Abundant in northern and cen- 



