1902.] NATURAL SCIENCES OF PHILADELPHIA. 167 



1879. Mormops megalophylla Alston, Biol Ceut.-Amer., Mamra., p. 

 37. (Part.) (Mexico [form?]; Tehuantepec.) 



1893. Mormops megalophylla Tliomas, Journ. Trinidad Field Nat- 

 uralists' Club, I, No. 7, p. 163. (Trinidad.) 



Type Locality. — As originally noticed (see above) this form was 

 supposed to have come from Cuba, but Peters in his paper, in which 

 the name megalophylla was proposed, shows that the species is 

 from Mexico. Examined in the light of present material, it is seen 

 that the typical form of the species is limited in INIexico to the 

 southern portion and Yucatan, which section shoidd be regarded as 

 the type locality. This is ascertained by an examination of Peters' 

 figure mentioned above and by comparing it with specimens ; the 

 differential characters of the races would be visible in the figure, 

 but it clearly represents the form to which I have limited it. 



Distribution. — Southern Mexico and Yucatan, south as far as 

 Colombia, northern Ecuador," Venezuela and Trinidad. Some 

 specimens recorded from ' ' South America ' ' no doubt came from 

 the northern portion of that vast continent. 



General Characters. — Internal connecting membrane of ear not 

 united with its fellow of the opposite side, except at extreme base ; 

 chin-lappet broadly and deeply divided. Skull with the rostral 

 portion much inflated. 



Head. — Ear large, not high ; apex subtruncate ; the internal 

 connecting membranes rather low, only confluent at the extreme 

 base on the rostrum, this section developing a pair of subcircular 

 appendages which conceal the anterior aspect of the point of 

 attachment; internal ridge rather high, moderately haired; lower 

 external margin of the ear voluminous, forming a very consider- 

 able pocket, which when extended projects a distance on each side 

 of the head equal to the thickness of the same; antitragus longi- 

 tudinal, low, rounded; tragus with the apical appendage subspatu- 

 late, the median whorl thickened internally, basal lobe trmicate 

 and more developed than in M. blainvillii. Eye small, with a 

 large V-shaped warty projection placed posterior to it, below the 

 axis of the ocular opening. Nostrils oval, slanting upward and 

 outward, the whole arrangement of callous pads being similar to 

 M. blainvillii, but the interuasal pads more robust and the laterals 

 oblong instead of subcircular. Upper lip very fleshy, tlie incision 

 near the commissure being wide and rounded. Chin-lappet roughly 



^* Oldfield Thomas in epist. 



