The Squirrels of Eastern North America. 157 



Cranial characters. Skull about the size of that of leucotis, showing no 

 characters by which it can be separated from any of the carolinensis series. 

 Size of an average adult skull : basilar length, 54.6; occipitonasal length, 

 63.2; zygoraatic breadth, 34.6; greatest height of cranium above palate, 

 19; greatest length of single half of mandible, 35.4. 



Size. Average measurements of nine adult specimens from Elk River, 

 Minn. : total length, 496.3; tail vertebrae, 220.4; hind foot, 67.2. 



General remarks. Little is known of this fine squirrel. My knowledge 

 of it comes wholly from Dr. Merriam's description and from four speci 

 mens from the type locality, Elk River, Minn., kindly lent me by him, 

 and ten topotypes in the Bangs collection. 



One point of some interest is that the northern gray squirrel (Sciurus 

 carolinensis leucotis) occasionally occurs at Elk River in considerable num 

 bers with hypophseus, but has not been known to breed there, appearing 

 only in migrations. This fact suggests the possibility of hypophseus prov 

 ing to be a distinct species when more is known of it. 



Specimens examined. Total number, 14, from Elk River, Minn. 



Sciurus carolinensis fuliginosus (Bachman). Bayou Gray Squirrel. 



1838. Sciurus fuliginosus Bach. , Proc. Zool. Soc. London, 1838, p. 96 ; Aud. 



and Bach., Quad. N. Am., Ill, 1853, p. 240, pi. CXLIX. 

 1895. Sciurus carolinensis fuliginosus Bangs, Proc. Bost. Soc. Nat. Hist., 



XXVI, p. 543, 1895 ; Rhoads, Proc. Acad. Nat. Sciences, Phila., 



1896, p. 196. 



Type locality. Near New Orleans, -La. 



Geographic distribution. The bayou region of the coast of Louisiana. 



General characters. Size larger than true carolinensis; colors rich and 

 dark ; under parts never pure white and often clear ferruginous ; tail long 

 and bushy, the hairs but slightly tipped with white ; feet large, soles 

 naked ; ears with often a woolly tuft at base in winter. 



Color. Upper parts deep yellowish ferruginous, varied with black ; the 

 hairs banded, many of them having the black band extending to the tip ; 

 tail dark, the hairs yellowish ferruginous at base, then black and tipped 

 with white, the black subapical band very broad and the white tips short ; 

 under parts varying from clear buffy ferruginous, the chin only gray, to 

 smoky gray ; line of demarkation between colors of upper and under parts 

 always low down and irregular ; ear tufts well developed, ferruginous in 

 the examples with ferruginous under parts, grayish white in the exam 

 ples with gray under parts. 



Cranial characters. Skull a little larger than that of true carolinensis, 

 otherwise similar. Size of an average adult skull: basilar length, 50.6; 

 occipitonasal length, 60; zygomatic breadth, 33.4; greatest height of cra 

 nium, above palate, 19.8 ; greatest length of single half of mandible, 36. 



Size. Average measurements of ten adult specimens from Gibson, La. : 

 total length, 467 ; tail vertebra, 219.5; hind foot, 67. 



General remarks. Sciurus carolinensis fuliginosus is confined in its ex 

 treme form to the heavy swamps of the bayou region of the coast of 

 Louisiana. Farther north in the ' prairie ' regions of the same State it 



