FEB 21 i9o? 



Hoice: Microtus pennsilvanicus. 201 



A NEW RACE OF MICROTUS PENNSILVANICUS. 

 By REGINALD HEBER HOWE, Junior. 



(Communicated to the Society, Dec. 5, 1901.) 



In July, 1900, with Mr. George C. Shattuck I collected a series 

 of Field Mice on Tumble Down Dick Island, near Long Island, 

 Penobscot Bay, Maine : later, in September Mr. Shattuck secured 

 two more on Long Island near Dark Harbour, and again last sum- 

 mer (1901), he collected five more specimens, one on Tumble 

 Down Dick, and the other four on Long Island. On taking the first 

 specimen out of the trap in 1900, I at once noticed its peculiarity 

 compared with specimens from the mainland, and the series I 

 now have before me leaves no doubt of it being distinct sub- 

 specifically from the mainland form. 



I take pleasure therefore in naming this new race for my 

 esteemed friend and fellow collector, Mr. George Cheever Shat- 

 tuck of Boston, Massachusetts. 



Microtus pennsilvanicus shattucki subsp. nov. 

 Penobscot Field Mouse. 



Type from Tumble Down Dick Island, near Long Island, Penob- 

 scot Bay, Maine. No. 10,011, adult female, Collection of the Mus- 

 eum of Comparative Zoology, Cambridge, Mass. Taken July 10, 

 1900, by Reginald Heber Howe, Junior and George C. Shattuck. 



Geographical Range: Tumble Down Dick, Long Island, and 

 probably other Islands in Penobscot Bay, Maine. 



