NO. 1537. NOTES ON MAMMALS OF INDIANA— IIAHN. -401 



broader rostrum and incisors ; colors darker, especially on the under- 

 side, which is more plumbeous or slaty (less hoary)." The average 

 measurements of nine adults are: "Total length, 125 mm.; tail 

 vertebrae, 20; hind foot, 20; greatest length of skull, 27.8." 



I have seen no specimens of t^^iical Syna'ptomys cooperi, excepting 

 the skull of the type, nor have I seen specimens of S. c. stonei from 

 near the tyjje locality. However, a comparison of skulls from 

 Indiana wdth the tyj:)e of cooperi and with the type of gossi shows 

 that they do not closely resemble either one, and that they difl'er 

 from the former to about the same degree and in the same manner 

 as given by Rhoads for stonei. The latter name being older than 

 helaletes, it is here adopted for the form of lemming mouse from the 

 Kankakee Valley, the status of the Dismal Swamp form being left 

 an open question. 



The skin of an adult male from Aylesworth measured as follows: 

 Total length, 123 mm.; tail vertebrae, 18; hind foot 18. Average of 

 two skulls, Cat. Nos. 141741, 141767, U.S.N.M., from Bluegrass Land- 

 ing and Aylesworth: Greatest length, 28 mm.; palatilar length, 12.7; 

 upper molar series, 7; width of rostrum, 5; greatest length of man- 

 dible, 16.2. Same measurements, in order for the type of Synaptomys 

 gossi: 30; 14; 7; 5.5; 16.5. Same for the ty]^e of ;S'. cooperi (the 

 greatest length not being obtainable). 12; 6.5; 4; 15. 



In the Atlantic Coast States Synaptomys is always found associated 

 with sphagnum bogs and marshes. In Indiana it has been found 

 only in dry, grassy fields. The two I obtained in the Kankakee region 

 were both taken in dense bluegrass by the side of the road, and it 

 did not seem to live in the marshy places where Microtus penn- 

 sylvanicus was most abundant. 



GEOMYS BURSARIUS (Shaw). 

 POCKET GOPHER. 



The pocket gopher is known to occur in Newton County, but it is 

 rare, and I did not obtain any specimens. 



ZAPUS HUDSONIUS ( Zimmerman j. 

 JTTMPING MOUSE. 



The only representative of this species that I obtained was taken 

 from the stomach of a bull snake, Pituophis saiji (Schlegel). 



ERETHIZON DORSATUM (LinnEeus). 

 PORCUPINE. 



I did not hear of this species, but there is a i)air of i)orcupines in 

 the State museum in Indianapolis, which were taken in Laporte 

 County a few years ago. 



