40 BULLETIN 43, UNITED STATES NATIONAL MUSEUM. 



Dobson (/. c.) considers M. calif ornicus, Baird, to be the same as M. 

 waterhousH, Gray. Speciuieus of the latter are not avaihible for ex- 

 amination. Bats of the Antilh'S may range north and west throngh 

 the neotropical belts of the United States, but ilf. icaierliouni does 

 not appear to be an example of the tendency. By the measurements 

 taken by INIr. Dobson this species appears to possess a smaller tail and 

 a shorter api)endage to the nose than does M. caUfornicus. Among 

 other measurements (English scale) of West Indian species are the 

 following: head,!'"; body, 2.(50"'; tail, 1.50'"; ear, 1.10'"; tragus, 0.42"' ; 

 nose-leaf, 0.30'" ; wing from carpus, 0.3'"; forearm, 0.2'". 



On tlie whole, I have concluded not to make any change in the name 

 of the Califoruian species of Macrotus^ and shall rest content to quote 

 from the first edition of the INEonograph (pp 3, 4) the following pas- 

 sages : 



A comparison of the type with good specimens of the latter from Cuba, pieserved 

 in alcohol, and presented by Prof. Poey to the Smithsonian Institution, show un- 

 mistakable difterences, as do others from Jamaica, recently received from Mr. March. 



The chin plates are less acutely defined; the internal border of the tragus is much 

 thickened, and the revoluted portion at the base of the external border is slightly 

 swollen. The fur is bicolored; central portion dark-brown instead of fawn. The 

 nose-leaf is of about the same height as above species; the tail, however, is 0.25 of 

 an inch shorter. The dentation is similar. 



The M. mexicana, Saussure, is a species from Mexico described by M. Saussure in 

 Revue et Mag. de Zool., 2d series, XII, 1860, 13. 486. The author states that the de- 

 scription is taken from a specimen which was in poor condition. It is difficult to 

 tell from his description whether his species is the same as M. californicua or not. 



Measurements of an average of four individuals. 



Milli- 

 meter.s. 



Length of head and body (from crown of head to base of tail) 39 



Length of head 22 



Height of ear 23 



Height of tragus 10 



Length of arm 22 



Length of forearm 48 



First digit : 



Length of first metacarpal bone 4 



Length of first phalanx 4 



Second digit: 



Length of second metacarpal bone 28 



Length of first phalanx 4i 



Third digit: 



I^ength of tliird metacarpal bone 34 



Length of first phalanx 14 



Length of second ])halanx 16 



Length of third phalanx 9 



Fourth digit: 



Length ©f louvth metacarpal bone 32 



Length of first phalanx 13 



Length of second phalanx 11 



