﻿LASIURUS BOBEALIS MEXICA^s^US. 



Ill 



Fig. 29.— Side view of skull of 

 («) Lasiurus (cUotis and (b) 

 L. horcalis ( x2). 



these tLe color is uniformly slightly darker and redder than in ordinary 

 red specimens of true horeaUs. The difference is especially noticeable 

 on the interfemoral membrane, rump, and lumbar region. One skin 

 ( S ) from Dulzura, OaL, almost lacks the grayish tips to the hairs on 

 the back. Another (also S ) taken at the same place on the same day 

 (November 5, 1891) shows the gray tips very 

 distinctly on the neck and fore part of the back. 



SJmll. — The skull of Lasiurus horeaUs teliotis 

 (figs. 28b, 29 a) is distinguishable from that of typ- 

 ical horeaUs by its smaller size, narrower rostrum, 

 and less flaring zygomata. That of an adult 

 male from Dulzura, CaL, measures: Greatest 

 length, 12.4; zygomatic breadth, 9; breadth of 

 rostrum at posterior edae of large premolar, 5.2; 

 upper tooth row, 4.6. The mandible of this spec- 

 imen is lost. That of another adult male from 

 the same locality measures: Length, 9; lower 

 tooth row, 5.4. 



Teeth. — The teeth are smaller thau in the typ- 

 ical subspecies, the upper molars are narrower on the inner (lingual) 

 side, and the mandibular teeth are narrower in their transverse diam- 

 eter (fig. 30 o.) 



Measurements. — See table, page 115. 



Specimens examined. — Total number, 10, from the following localities: 



California: Exact locality unknown, 1 (type); Bakersfield, 1; Berryessa, 

 Santa Clara County,! (skin); Dulzura, 2 (skins, Miller coll.); Fresno, 1; 

 Santa Ysabel, San Diego County, 1; Tehama, 1; Three Kivers, 1. 



Lower California: Comondu, 1 (skin). 



General remarlxS. — Lasiurus hore- 

 aUs fe/io^is is readily distinguish able 

 from typical horeaUs by its smaller 

 ear, with less developed and entire 

 external basal lobe, smaller skull, 

 with narrower rostrum, and weaker 

 dentition. From L. horeaUs mexi- 

 canus it differs in completely furred 

 dorsum of interfemoral membrane and more hairy under side of wing. 



Fig. 30.— Teeth of (a) Lasiurus teliotis and (b) L 

 borcalis (X5). 



LASIURUS BOREALIS MEXICANUS (Saussure). 



1861. Atalapha mexicana Saussure, Revue et Mag. de Zool., 2e sdr., XIII, p. 97, Mars., 



1861 (southern Mexico). 

 1871. Atalcqjlia fmntzii Fetevs, Monatsber. K. Preuss. Akad. Wiss,, Berlin (1870), p 



908, 1871 (Costa Rica). 

 1878. Atalapha novehoracensis \a.T. - a {AtaJaplia frantzii) Dobsou, Catal. Chiroptera 



Brit. Mus., p. 271. 



Type locaUty. — ]S"ot stated, but without doubt iu some one of the 

 States of southern Mexico, probably Vera Cruz, Puebla, or Oaxaca. 



