Netv Subspecies of Flying Squirrel from Nebraska 3 



but flattish as is typical for forms of P. volans. Measurements 

 of the type in millimeters : Total length, 29.75 ! occipitonasal 

 length, 35.25; zygomatic width, 21.5; interorbital width, 7.75; 

 greatest height of skull above palate, 12.75 ; audital bullae. 9X9- 



In 1888 Mr. W. Edgar Taylor,^ then of the State Normal 

 School at Peru, Nebraska, gave the measurements of the five 

 specimens of flying squirrels from Nebraska City, Nebraska, 

 previously referred to, and remarked : " It might be well to 

 notice that the average measurements given in this article are 

 about the same as given by Coues and Allen for 5. volncella var. 

 hudsonius {=P. sabrinus et subspp.), which is stated to exist 

 ' mostly north of the parallel of 49° ' ; average measurements of 

 var. volucella (='P. volans et subspp.), the southern variety, 

 being much less." 



A study of the measurements referred to seems to establish 

 the correctness of Mr. Taylor's statement. Eliminating a speci- 

 men without definite locality (996), two with incomplete meas- 

 urements (763 and 3597), and an obviously young animal (2510), 

 we find the measurements given by Allen'' of the remaining" thirty- 

 two specimens, translated into millimeters, may be summarized 

 as follows, giving extremes followed by averages in parentheses : 



Length from Nose to End 

 of Tail Hairs 



Tail to End of Hairs 



Tail Vertebrae 



[0 Maine specimens. . 255.50-292.50 (275.75) 

 3 New Hampshire 



specimens 246.25-296.25 (275.75) 



9 Massachusetts 



specimens 215.00-293.75 (237.50) 



2 IlUnois specimens. . 226.50-232.50 (229.50) 

 2 Georgia specimens. I 218.25—224.00 (222.50) 



2 Mississippi speci- 



mens 217.50-227.50 (222.50) 



3 Louisiana speci- 



mens 217.50-227.50 (221.75) 



I Maryland specimen (230.00) 



127.50-150.00 (138.75) 



116. 25-150. 00 (137.00) 



97.50-137-50 (112.75) 



103-73-122.50 (115.00) 



102. 50-118. 75 (112.75) 



80.00-112.50 ( 90.75) 



107. 50-117. 50 (112.50) 90.00-100.00 ( 95.00) 



104.50-105.00 (104.75) 87.50- 90.00 ( 88.75) 



97.50-102.50 (100.00) I 85.00- 90.00 ( 87.50) 



97.50-102.50 ( 99-50) 1 72-50- 91-75 ( 86.00) 



(102.50) 1 ( 87.50) 



Of these, the Maine and New Hampshire specimens are obvi- 

 ously considerably and abruptly larger than the specimens from 



^ Amcr. Nat., XXII, pp. 744-745 (i 

 " Monog. N. A. Rodentia, p. 663. 



153 



