AMERICAN BATS OF THE GENERA MYOTIS AND PIZONYX 209 



Wings from the middle of the tibiae, and from the sides of the back almost 

 as close to the spine as in Viespertilio] macrotarsus from the Philippine 

 Islands. Interfemoral membrane triangular behind, last caudal vertebra free; 

 calcaneum weak, concave behind. 



Feet remarkably large, proportionally larger than in any other known species 

 of the genus ; the outer toe much shorter than the others. 



Fur long and dense, extending thinly upon the upper surface of the inter- 

 femoral membrane as far as the end of the fourth caudal vertebra, and upon 

 the legs to the ankles. Above, dark brown, with paler extremities; beneath 

 a lighter shade of the same color. 



First and second upper premolars minute, internal to the tooth row, but 

 distinctly visible from without, the second very much smaller than the first; 

 second lower premolar very small and quite internal, in the angle between 

 the closely approximated first and third premolar. 



Measurements. — The measurements of the type as given in the 

 original description are as follows: Total length, 115; head, 23; 

 height of ear, 19; anterior margin of ear, 17; breadth of ear, 9.5; 

 tragus, 9; tail, 48; forearm, 53; thumb, 14; third metacarpal, 49; 

 fifth metacarpal, 47.5; tibia, 20; foot, 20; calcar, about 22. 



Remarks. — The type of Vespertilio pilosits, as we were informed 

 by Mr. J. Berlioz of the Museum d'Histoire Naturelle, through the 

 kindness of the late Prof. E. L. Trouessart, is no longer in the Paris 

 Museum, nor can any mention of it be discovered in the catalogue. 

 The animal was supposed by Peters to have come from Montevideo, 

 Uruguay, but its very obvious similarity to the large- footed Old 

 World bats of the " Leuconoe,^'' type and especially to the Philippine 

 Myotis Tnacrotarsus^ with which it shares the peculiarity of having 

 the wings attached high on the sides of the back, at once raises the 

 suspicion that there was a mistake with regard to the locality, and 

 that the specimen may have really come from somewhere in the East 

 Indies, reaching the Paris Museum perhaps through the Verreaux 

 brothers, notoriously careless in the labeling of the specimens which 

 they offered for sale. Since a second specimen of the species has 

 not been taken, either in America or in the Old World, it seems for 

 the present best to include the animal here provisionally, pending 

 the confirmation of the alleged locality through the capture of addi- 

 tional examples. That a bat of this kind should exist in South Amer- 

 ica and successfully elude capture for more than half a century 

 can not be regarded as an impossibility in view of the remarkable 

 history of such a conspicuous animal as Pizonyx vivesi. 



m. THE SPECIES OF PIZONYX 

 PIZONYX VIVESI (Menegaux) 



Myotis vwesi Menegaux, Bull. Mus. d'Hist. Nat. Paris, vol. 7, p. 323, 1901. — 

 Elliot, Land and Sea Mamm. Middle Amer., Field Columb. Mus., publ. 95, 

 zool. ser., vol. 4, p. 574, 1904. — ^Trouessakt, Catal. Mamm. viv. foss., suppl., 

 p. 94, 1904. — Elliot, Check List Mamm. North Amer., Field Columb. Mus., 

 publ. 105, zool. ser., vol. 6, p. 474, 1905. 



