1894.] NATURAL SCIENCES OF PHIL,ADEL,PHIA. 159 



12. Sciurus carolinensis Ginel. Gray Siiuiircl. 



Abundant and presenting but slight variability. No niclanistic 

 examples reported. 



13. Sciuropterus volucella (Pallas). Flying Squirrel. 



Five specimens of this species are of special interest as they ap- 

 pear to be the tirst to go on record from Florida. They present no 

 characters in either old or young which are not nearly duplicated by 

 specimens from the Middle States. 



14. Geomys tuza Ord. Florida Gopher. 



Thirty specimens of all ages do not present the plumbeous color 

 variations so strongly marked in G. bursarius (Shaw). They are not 

 as variable as a like series of Sltomy.'i americaniis, such differences as 

 appear being due to ordinary results of age and season. One very 

 large, old male is uniform bright rusty above and hoary fulvous be- 

 neath. The rest are darker, the rusty mainly confined to sides, with 

 a duskier dorsal stripe and hoary plumbeous belly. The naked yel- 

 lowish tail invariably has a mahogany- colored tip and averages half 

 the length of head and body. Some females, apparently only half 

 grown, were nursing young. 



15. Mus decumanus Pallas. Norway Eat. 



16. Mus alexandrinus Geoft". Eoof Eat. 



17. Mus musculus Linn. House Mouse. 



With exception of the Norway Rat these old-world species are 

 very abundant. 



18. Sitomys americanus gossypinus (Le Conte). Pine-woods Deer Mouse. 



A series of thirty Tarpon Springs specimens show no mentionable 

 differences from those of northern Florida. Two skins have a pre- 

 vailing dark sooty suffusion of the under parts which at first sight 

 would indicate a specific difference, but it is probably due to their 

 residence in a recently burnt clearing. In young specimens the gray 

 is more hoary above than in typical americanus and the underparts 

 are more plumbeous, lacking almost entirely the pure white of lower 

 head and neck seen in young americanus. 



19. Sitomys niveiventris subgriseus (?) Chapman. Pigmy Deer ]\[ouse. 

 *Bull. Am. Mus. N. Hist., II, 1889, 117 ; ibid, 1893, Art. XX 



