Vol. XXII, pp. 23-34 March 23, 191 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



NOTES ON MAMMALS OF THE MIDDLE MISSISSIPPI 

 VALLEY, WITH DESCPJPTION OF [ 



A NEW WOODRAT. V^ 



BY ARTHUR H. HOWELL. 



The field work of the Biological Survey in IDOl) included a 

 i^urvey of southeastern Missouri, southern Illinois and Indiana, 

 and parts of Kentucky. This trip, accomplished between April 

 20 and July 15, resulted in the accumulation of much new 

 information on the distribution of the mammals of the region, 

 and since very little has been published concerning the mam- 

 mals of any of the States visited, excepting Indiana,* it is con- 

 sidered desirable to place on record the more important results 

 of the season's work. 



Missouri was the first State visited, and after a few days spent 

 near St. Louis — at Horseshoe Lake, St. Charles County (April 

 21, 22) — I proceeded to the interesting "sunken lands" of 

 southeastern Missouri. Collections were made principally on 

 the St. Francis River, west of Senath (April 25-30) and at 

 Kennett (May 1, 2), Portageville (May 3, 4), and Cushion Lake 

 (May 5-7). Short stops at Marble Hill (May 8-10) and at 

 Cape Girardeau (May 11, 12) resulted in determining the upper 

 limits of Lower Austral Zone in the State. 



After crossing the Mississippi at Cape Girardeau, investiga- 

 tions were continued in Illinois at the following localities : 

 McClure (May 13), Olive Branch (May 14-21), Cobden and 

 Lick Creek (May 22), ^Volf Lake (May 23-25), Riehl Station, 

 near Alton (May 29, 30), Odin (June 4, 5), Olney (June 6-9), 

 Kansas (June 10, 11), St. Francisville (June 12), Shawnee- 



* See a valuable contribution by W. L. Hahn, on "The Mammals of Indiana," 

 < 33cl Ann. Rep. Dcpt. Geol. ct Nat. Resources of In<liana, I'.iO'.t, pp. -in-dOa. 



G— Pkoc. Biol. Soc. Wash., Vol. XXIII, 1910. (23) 



