ALLEN : NOTES ON CHIROPTERA. 



57 



dition in the preservative fluid. Their skulls are similar to those from Buenos 

 Ayres, Mexico, and Texas. The minute anterior upper premolar varies cousider- 

 ably in shape in different individuals ; in some it is a terete spicule, in others the 

 base may be markedly broader. Among twenty-eight specimens from Texas, 

 seven lack the third lower incisor, while in three others that of the right hand side 

 is gone. In three other cases it is the third incisor of the left hand side that is 

 missing. In these individuals there may be a space between the second lower 

 incisor and the canine, as if the third incisor had been shed, or the second incisor 

 may be in close contact with the canine. In one (No. 6057) the third incisor is 

 present on both sides, but is a very minute rounded spicule, to be with difficulty 

 seen by the aid of a lens. 



Nyctinomus brasiliensis cynocephalus (Le Cokte). 



The Nyctinomus of Florida, as pointed out by Miller (Proc. Boston Soc. Nat. 

 Hist., 1898, vol. 28, p. 218), differs from that of Texas and Mexico in its uniformly 

 darker coloration. The back "is intermediate between tlie 'seal brown' and 

 'mummy brown' of Ridgway, but nearer the former," while the ventral surface 

 is slightly paler. The liairs are hardly paler at the bases. A series of skins from 

 Texas is distinctly of a lighter tint than the specimens from Florida, with the bases 

 of the hairs grayish, especially about the nape and shoulders. A specimen from 

 Gibson, Ga., is of a reddish tint and much paler than the series of skins from 

 Florida. The latter can hardly be considered more than subspecifically distinct 

 from N. brasiliensis of Texas and Mexico. 



Nyctinomus antillularum Miller. 



The collection contains three alcoholics from St. Kitts, West Indies (included 

 by Miller in the range of the species), and three from St. Bartholomew's Island. 

 In the original description, the forearm of the type is given as 47.4, an obvious 

 misprint for 37.4. Below are the measurements of two specimens (Nos. 6019, 

 6020) from St. Kitts, and two from St. Bartholomew's Island (Nos. 6023, 

 6024). 



MEASUREMENTS OF NYCTINOMUS ANTILLULARUM. 



