1898.] NATURAL SCIENCES OF PHILADELPHIA. 333 



length, 23.4 (19.8) ; 5 basilar length, 19.8 (16.2) ; zygomatic breadth, 

 10.8 (9.6) ; last molar to tip of haniular, 7 (5.6) ; last width of bony- 

 palate behind molars, 2.4 (2.2) ; mandible, 15.8 (13) ; maxillary 

 tooth row, 8.2 (6.8) ; mandibular tooth row, 8.6 (7). 



General remarks. — Glossophaga longirostris needs no close com- 

 parison with other members of its genus. Should the early decidu- 

 ous incisors prove to be a constant character, the animal will prob- 

 ably require at least subgeneric separation from the forms related to 

 6r. soricina. 



REITHRONYCTERIS gen. nov. (Glossophaginse.) 

 Type Eeithronycteris apliylla sp. nov. 



Generic characters. — Dental formula (as in Phyllonycteris), i, 

 2 z 2 > c > ^~zr > P m > ~r > m > ^f^=32 ; zygomatic arches incomplete (as 

 in Hemiderma) ; floor of brain-case from basisphenoid forward ele- 

 vated out of its usual position, so that the roof of the posterior nares 

 is formed by two longitudinal folds, given off by the pterygoids and 

 nearly meeting in the median line in the region usually occupied by 

 the basisphenoid and presphenoid (figures 3 and 4) ; calcar ab- 

 'sent ; nostrils perforating a disc shaped elevation which lacks a true 

 "leaf" or free, pointed process above (the conditions are exactly 

 reproduced in Brachyphylla) ; ears small and separate ; tongue 

 broader than in Phyllonycteris and more abruptly narrowed at tip, 

 the papillae short and stiff; tail about as long as femur. 



General remarks. — Reithronycteris is a very aberrant member of 

 the subfamily Glossophagince. Its broad teeth, heavy rostrum, mas- 

 sive lower jaw and broad tougue with short papillae remove it widely 

 from extreme forms such as Chceronycteris and Lichonycteris. In 

 its reduced nose leaf and in the form of the mandible and of the 

 mandibular teeth it resembles Brachyphylla. Whether these char- 

 acters indicate any real affinities with the Stenodermata is, however, 

 very questionable. 6 In addition to these less important characters, 

 Reithronycteris differs from all other bats with which I am ac- 

 quainted in the structure of the interpterygoid region. 



Measurements in parenthesis are those of an adult female, Glossophaga sori- 

 cina. from Cuernavaco, Morelos, Mexico (No. 36,017, TJ. S. Nat. Mus.), 



6 Since this paper has been in type I have received the late Dr. Harrison 

 Allen's monograph of the Glossophagina? (Trans. Am. Philos. Soc. , N. S., 

 XIX, pt. II, pp. 237-266, June, 1898). Here Brachyphylla is united with 

 Phyllonycteris to form the group ' Brachyphyllina,' placed at that end of the 

 glossophagine series nearest the Stenodermatinse. 



