156 PROCEEDINGS OF THE ACADEMY OF [1894. 



triangular, in lotor the molars are quite symmetrically rounded. 

 The premolars in the former are large, strongly rooted and always 

 present, in Joior they are relatively smaller and the first premolar 

 often crowded out. Auditory meatus of hernandezii produced like 

 the neck of a flask, making transverse diameter of bullte much greater 

 than the longitudinal, in lotor these diameters are equal. In lotor the 

 median attenuation of the zygomatic arch is decided, narrow and semi- 

 cylindrical ; in hernandezii it is slight, the malar being broad and 

 strap- like. A strong and constant difference between Pacific and At- 

 lantic Coast specimens is the much greater relative size of the brain 

 and bi'ain-case in the former, especially in the anterior breadth and 

 greater depth. This feature causes a specific difference in the upper 

 cranial profile; in hernandezii there is a gentle continuous rise from 

 nasals to the fronto- parietal suture or even farther back, in lotor this 

 ascent is more abrupt to the interorbital region, which is tumid, fol 

 lowed by a depression and rising again, giving the skull an undulat- 

 ing profile. 



The characters given by Prof Cope (Amer. Nat., Feb., 1889, pp. 

 141-142), as distinguishing lotor from hernandezii I do not find of as 

 constant value as those above given, except those relating to the latter 

 species near the bottom of page 142, notably the greater prominence 

 of the post-orbital processes of the malar and frontal bones. 



4. ? Atalapha borealis - pfeifFeri (Gundlach). Florida Red Bat. 



All the specimens of this bat sent from Tarpon Springs, as well as 

 those whif'h I have examined from other parts of the State, are uni- 

 formly of the " deep chei'ry red" spoken of by Dr. J. A. Allen 

 (ji'up. eit, p. 173). Dr. Harrison Allen (Mon. Bats. N. Amer., 

 1893, p. 146) notices the same peculiarity and refers them question- 

 ably to A. pfeifferi Gundlach, (Monatsb. K. B. Akad., Berlin., 

 1861, p. 152). ' 



Dr. Guudlach's description, which is full, seems to answer for this 

 form very well, except that he states the roots of the hairs are gray, 

 whereas in Florida specimens the roots are black. The color of 

 pfeifferi is said to be cinnamon red in the male and cinnamon brown 

 in the female. I have been unable to secure specimens of the Cuban 

 form for comparison, so refer the Floridian variety to it for the pres- 



2 Vespertilio borealis Miiller, Natursyst., Snppl., 1776, p. 20, antedates V. nove- 

 boraceiisis Erxl., Syst. Reg. Anim., 1777, p. l.'j.'j. 



