ECOLOGY OF ISLE ROY ALE. 191 



letter A. following the scientific name. On the basis of these two lists, 

 206 species are now recorded from the island. It is not improbable 

 that other species have been recorded in the scattered literature, but 

 no effort has been « made to search for them. Undoubtedly only a fair 

 start has been made in the study of the beetle fauna. Careful detailed 

 collecting, covering several years, would probably increase the number 

 about five times, or bring it up to about 1,000 or 1,100 species; that is, 

 judging from other northern localities. Pettit has recorded from 

 Grimsby, Ontario 1,14.3 species and Harrington ('84) from Ottawa 

 1,003 species. On the other hand it is not improbable that the present 

 known 206 species give a fair sample of the dominant features of the 

 beetle fauna. Wickham's ('97) Bayfield, Wisconsin list contains 691 

 species (six weeks collecting by an expert). Such statistics mean but 

 little, beyond showing the reduction in variety toward the north when 

 compared with southern localities. The two best local southern lists — 

 the best in America — are those by Ulke for Washington, D. C, with 

 2,975 species, and by Dury for the region about Cincinnati with 2,290 

 species. Two important intermediate locality lists between these north- 

 ern and southern ones are from the vicinity of Allegheny and Pittsburg 

 by Hamilton, in which 2,153 species are listed or 2,500 as given by 

 Klages ; and at Buffalo, where about 1,424 species are listed by K«ineck« 

 and Zesch. The variety in beetle life is thus seen to drop off about % 

 or more in passing from the latitude of Washington and Cincinnati to 

 that of Lake Superior and the St. Lawrence valley. 



2. Miscellaneous Notes on, the Fauna. In the present list there are 

 included 6 species which in the Hubbard and Schwarz list are indicated 

 as "Species found by Dr. LeConte, mostly catalogued in Agassiz' Lake 

 Superior, p. 203-239, which have not since occurred." These species 

 are as follows: Carahus seratus, Calthus gregarius, Blechrus wigrinus 

 {linearis Lee), Harpalus ruficollis, Pachyta litwata, Donacia proaeima. 

 All these and other rare species turned up in our collection. 



LeConte and Horn describe the following three new species from 

 Isle Koyale specimens in the Hubbard- and Schwarz paper: Hahroceras 

 magnus Lee, p. 598; Phymatodes inaculicollis Lee, p. 614 (from one 

 specimen) ; Orchestes camis Horn, p. 620. None of these species were 

 found in our collection. LeConte ('78, p. 463) described Magdalis 

 alutacea {armicollis Say) from Colorado and Isle Koyale specimens. 



As numbered in the accompanying list of species collected during 

 1905, the following are not to be found in the Bayfield list by Wickham ; 

 No's. 2, 6, 7, 10, 12, 15, 16, 17, 18, 20, 21, 22, 25, 27, 30, 34, 36, 41, 

 50, 52, 53, 55, 56, 59, 60, 62, 64, 73, 76, 77, 79, 81, 85, 86,-35 species. 



