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NORTH AMERICAN FAUNA. 



Vu/ht j/elloivish hroum; on the under surface the color is a, little darker, owino- to the 

 outer extremities of the hairs being more narrowly edged witli the prevailing color 

 on the back, exhibiting the darker shades l)encath. The ears and tragus are black- 

 ish — the nose, chin, wings, and interfemoral membrane dark brown. 

 Hah. — We have obtained but a single specimen, which was captured at California. 



2-2 1-1 



Dentition. — Incisors-g^. Canines 



Dimensions. — Length of head and body, 1 inch 7 lines [40 mm.] ; length of tail, 1 

 inch 5 lines [35.8] ; length of spread, 7 inches 6 lines [190] ; height of ear posteriorly, 

 3 lines [6.35] ; height of tragus, 2 lines [3.8]. 



The only otlier small bats known to occur in California are Pipistrellus 

 kesperus, Myotis thysanodes, M. yumanensiSy M. evotis, and M. lucifugiis 

 longicrus. That VespertiUo californimis can not be Pipistrellus hesperus 

 is sliown by tlie description of the tragus. From Myotis thysanodes it is 

 separated by its small size and unfringed interfemoral membrane j from 

 M. ynmanensis by its small feetj from M. evotis by its short ears, and 

 from 31, lucifugus longicrus by its light color and small size. Myotis 

 thysanodes and M. lucifugus longicrus are moreover comparatively rare 

 bats in California, while ^VespertiUo nitidus'' is one of the most common 

 and universally distributed species. 



Carolii (Vespertilio). Temminck, Monographies de Mammal., 11, p. 

 237 (13me Monogr.), 1835-41, The Vespertilio carolii of Temminck is 

 without doubt Myotis lucifugus (Le Conte). That it is a Myotis is shown 

 by the number of teeth, six molars in each jaw, while that it is not M. 

 subulatuSj the only other species known to occur in the vicinity of Phil- 

 adelphia or New York, is shown by the short ear, 11.5 mm. in length.^ 



Carolinensis (Vespertilio). Geoffroy, Ann. du Mus. d'Hist. Nat., Paris, 

 VIII, p. 193, 1806.2 



This species is Vespertilio fuscus Beauvois. Dr. Harrison Allen in 



^The essential part of the original description is as follows: 



"Taille et formes de notre pipistrelle, mais les oreilles plus longues. * * * 

 oreilles mddiocres, ovoides, un pen decoupees a leur hord extorienr, sans lobe on 

 prolongement en avant; tragus en feuille de saule * * Dents incisives 4 par 

 paire en haut et 6 en has; molaires 6 partout; les deux premieres fausses molaires 

 de la machoire sui^erieure tres petites, courtes et pointues. 



"Pelage bicolore partout. Joues, cotes du cou et toutes les parties sup6rieures 

 d'un hrun-roussatre a base des polls noirs ; en dessous d'un blauc jauuatre a la pointe 

 et brun-fonce a la base * * *^ 



"Longueur totale 3 ponces 5 lignes, dont la queue preud 1 ponce 4 lignes; enver- 

 gure 8 ponces 6 lignes; antibrachinin 1 ponce 4 lignes; hauteur de Toreille dejjuis le 

 crane jusqu'au l)ont 5 lignes ; * * *. 



"Patrie. L^^merique septentrionale, dans les environs de Philadelphie et de New- 

 York." 



'-^The original description is as follows: 



"2. VesjjlertUio'] carolinensis. Le vespertilion de la Caroline est moins grand ([ue 

 le pr6c6dent [' V. mnrinns' ], mais d'ailleurs il lui ressemble beaucoup. 11 a ses oreilles 

 et oreillons de meme forme et de meme dimension relative; son poil est aussi de deux 

 couleurs, cendr^-noiratre d'abord et brun-marron a la pointe. L'extremit6 des poils 

 est en dessous d'un jaune tirant sur le ventre; entin les oreilles sont garnies de poils 

 dans presque la moitio de leur longueur, ot l-i queue a une petite portion qui n'est 

 pas enveloppee par la membrane interfemorale. Ces considerations reunies a celles 



