2 Myron Harmon Szvenk 



differing from P. v. goldmani Nelson,* of southern Mexico and 

 Guatemala, in the dusky instead of whitish nose and the merely 

 very slight pinkish wash of the under parts. 



Color. — Upper parts yellowish drab to dusky brown, more or 

 less tinged with fulvous or russet, usually but slightly so but 

 occasionally rather strongly so, the hairs usually black basally ; 

 under parts pure white to the bases of the hairs, with a very 

 slight wash of pinkish buff on the sides, this deeping on the under 

 side of the wing membrane; wing membrane above mostly black, 

 sparingly mixed with yellowish drab internally but broadly nearly 

 pure black marginally, very narrowly edged with white ; tail 

 above yellowish drab more or less intermixed with dusky, espe- 

 cially terminally, and washed with vinaceous basally, usually as 

 dark or darker than the back, below grayish with a median white 

 line, sometimes more or less washed with buffy or pinkish 

 laterally, occasionally quite strongly so, always darker and more 

 reddish than the under parts of the body ; eye usually encircled 

 with a narrow blackish ring enlarged into a small spot before the 

 eye, this sometimes obsolete, sometimes a well-marked white 

 spot at the base of each ear, these spots usually obsolete ; fore 

 feet above dusky gray, hind feet above sooty, the toes dark gray. 



Measurements. — Extremes and averages of 4 adult specimens 

 from the type locality as given by Taylor and translated into 

 millimeters: Length (to end of tail hairs), 276.25-315.00 

 (297.81); tail (to end of hairs), 125-133.75 (127.18); of an 

 immature specimen from the type locality; length (to end of tail 

 hairs), 236.25, tail (to end of hairs), 106.25. 



Measurements of Type. — Length to end of vertebrae, 240.5 ; 

 length to end of tail hairs, 256.5; tail vertebrae, 115; tail to end 

 of hairs, 131; hind foot, 30.5; ear from crown, 18; ear inside. 

 21.5. 



Skull. — Very similar to that of P. v. volans, but the audital 

 bullae slightly larger and more rounded, though not so inflated 

 as in P. V. querceti, and not at all flattened as in P. sahrinus et 

 subspp., nor with the nasals elevated at the end as in that species, 



^Proc. Biol. Soc. Wash., XVII, p. 148 (1904). 



152 



