Ward — The Variations in Proportions in Bats. 643 
of specimens. While the amount of variation is in all prob¬ 
ability most imperfectly shown the series is sufficient to indicate 
that numerous disproportions exist; probably to approximately 
the same extent as in the other species. 
The forearm is greater or less than either the second or fourth 
metacarpals and is equal to or less than the third metacarpal, the 
second is less than the third and greater or less than the fourth, 
the third is greater than the fourth in the few specimens recorded. 
Two young and one adult in the museum were collected 
by R. Montes de Ctea in Soconusco, Chiapas. The adult, a 
male, is remarkable for its exceedingly short tail. The length 
of head and body is 83 mm. and that of the tail only 42 mm. 
Its other measurements are in all cases paralleled by the Morelos 
specimens with the one exception that the first phalanx of the 
fourth digit measures but 19 mm. which is one mm. below the 
minimum of the Morelos specimens. 
Two young males collected in Tetecala with the other speci¬ 
mens from that locality were apparently recently born and would 
indicate that the latter part of September or first of October is 
about the time of birth of this species in Morelos. They were 
both entirely naked except for a slight fuzz about the muzzle and 
bristles, nearly as large as in adults, on the sides of the feet. 
When taken, the ears were closely adpressed so as to tightly cover 
thy eyes. The sexual organs and the gular pouches were well 
developed. The retarded development of the metacarpals and 
phalanges is noticeable in them. 
Their measurements are as follows : lengths respectively 58 
and 57; tail 32 and 30 ; head 22 and 21; ear 9 and 10 ; forearm 
30 and 28; thumb 7 and 7; second metacarpal 20 and 20; third 
metacarpal 23 and 20; first phalanx, third digit £ and 8; second 
phalanx 6 and 5; fourth metacarpal 22 and 19; first phalanx, 
fourth digit 7 and 7; second phalanx 3 and 2; fifth metacarpal 
17 and 14; first phalanx, fifth digit 7 and 6; second phalanx 4 
and 5 ; tibia 13 and 12 ; foot 11 and 12. 
These specimens were taken at the hacienda of Cocoyotla, Dis¬ 
trict of Tetecala, from between the closely placed rafters of one 
of the buildings. 
