4 Myron Harmon Szvenk 



the other localities, and are quite probably referable to P. sabrinus 

 macrotis Mearns/ which they approximate in measurements. 

 Moreover Bangs^ does not record P. volans volans from Maine 

 at all, and states that it reaches only southern New Hampshire, 

 where it overlaps the range of P. s. macrotis. If we include all 

 thirty-two specimens the average length is 248.9 mm., the average 

 length of the tail vertebrae is 102.18 mm., and the average length 

 of the tail to end of hairs is 119.33 mm. But if we eliminate the 

 thirteen northern specimens, we find the average length of the 

 other nineteen specimens drops to 236.62 mm., the average length 

 of their tail vertebrae to 94.18 mm., and the average length of 

 the tail to end of hairs to 106.33 i™^^- The average measure- 

 ment of seven adults of P. v. volans from Connecticut, as given 

 by Bangs, is total length, 234.5 mm., tail vertebrae, 99.6; and of 

 three adults of P. v. querceti from Florida, total length 237.66, 

 tail vertebrae 102.66. It is thus seen that the average of the 

 five adult or subadult Nebraska animals is over 50 mm. more in 

 total length to end of tail hairs (289.5:236.6) and about 20 mm. 

 more in length of tail to end of hairs (129: 106) than the average 

 of nineteen adult or subadult flying squirrels of the eastern 

 United States. 



Summarizing, P. v. nehrascensis is larger and longer-tailed 

 than either P. v. volans or P. v. querceti; it seems to agree with 

 P. V. querceti in its dark toes and to approach it in its some- 

 what enlarged audital bullae, but differs in its less russet dorsal 

 coloration and the merely slight pinkish or russet wash on the 

 under parts, and it has darker feet and toes than P. v. volans. 

 No information is at hand as to the extent of its geographical 

 distribution. 



"^ Mearns gives for P. s. macrotis the following measurements : Length 

 280 mm.; tail, 125 mm.; hind foot, 38 mm. 

 ^ Proc. Biol. Soc. Wash., X, pp. 162-166 (1896). 



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