4. MACK0TTJ8. -t65 



The face is thinly covered with short hairs. Above, yellowisli 

 white at the base of the hairs, then dark reddish brown ; beneath 

 paler reddish brown ; females always darker. 



Upper middle incisors narrow, close together, moderately long 

 and unicuspidate ; outer incisors very short, scarcely raised above 

 the gum, occupying the space between the middle incisors and the 

 canines ; first upper premolar narrow and long (in antero-posterior 

 diameter at the base), with an oblique cusp directed forwards and 

 downwards towards the canine, against which it is closely approxi- 

 mated ; second premolar with a single conical cusp directed down- 

 wards and slightly backwards, so that a considerable space exists 

 between the cusps of the first and second premolars, though their 

 bases are close together ; molars with W-shaped cusps much broader 

 than the internal flat projecting base ; last molar scarcely one third 

 the antero-posterior diameter of the antepenultimate molar ; lower 

 incisors very smaU and equal, forming a semicircle across the 

 narrow space in front of the canines ; lower premolars nearly equal 

 in vertical extent, but the first jpremolar is greatest in cross section, 

 and the third is nearly equal to the second. 



The space between the last molars is less than half the length of 

 the bony palate, which does not extend as far backwards as the 

 middle of the zygomas ; roof of the mesopterygoid fossa divided by a 

 prominent longitudinal bony ridge, which is traversed by a canal ; 

 basisphenoid not excavated between the auditory bullae, no post- 

 orbital processes of the frontals. 



Length, head and body 2"-55, taU l"-4, tail free from membrane 

 0""2, head 1", ear 1"*2, tragus 0"-45, nose-leaf 0"-35, forearm 

 2"-] 5, thumb 0"'5; third finger — metacarp. 1"'5, 1st ph. 0"'68, 

 2nd ph. 0"-7, 3rd ph. 0""55 ; fourth finger — metacarp. l"-45, 1st 

 ph. 0"-6, 2nd ph. 0"-6 ; fifth finger— metacarp. l"-6, 1st ph. 0"-55, 

 2nd ph. 0""5 ; tibia 0"-85, calcaneum 0"-5, foot 0"'5. 



Hah. California ; Mexico ; Jamaica ; Cuba ; Hayti. 



I have not seen the types of M. californims and M. meooicanus, 

 but, judging from the descriptions, they appear to be quite identical 

 with this species. Of M. californicus Mr. Allen remarks (I. c. p. 4) 

 that, compared with M. waterhousii, " 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 bicoloured ; central portion dark 

 brown instead of fawn. The nose is about the same height ; the 

 tail, however, is 0-25 inch shorter. The dentition is similar." 



M. minor, Gundlach, Peters (subspecies), appears to be a small 

 variety, or perhaps a small example only of this species, with the 

 forearm l"-85 long, the ear 1", and the nose-leaf 0"-2. 



This species in external form resembles Megaderma lyra of India, 

 agreeing with that species and with the other species of the sub- 

 genus Megaderma in the long conical muzzle, in the deep groove in 

 the front of the lower lip bounded by raised naked cushions, in the 

 large rounded ears, in the large eyes, and in the great development 

 of the volar membranes. So great, indeed, is the general resem- 



2h 



