. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. NYCTALUS 243 1878. Vesperiigo Dobson, Catal. Chiropt. Brit. Mus., p. 183 (part). 1893. Noctulinia H. Allen, Proc. National Lluseum, xvi, p. 30, June 13, 1893. 1897. Pterygistes Miller, Ann. and Mag. Nat. Hist., 6th ser., xx, p. 384, October, 1897. 1899. Euvcsperugo Acloque, Fauna de France, Mammif^res, p. 32 (part, included noctula, leisleri, maurus, kuhlii, 'pipistrellus, and abrcmnus). 1907. Pterygistes Miller, Families and Genera of Bats, p. 207, June 27, 1907. 19
. Catalogue of the mammals of Western Europe (Europe exclusive of Russia) in the collection of the British museum. Mammals. NYCTALUS 243 1878. Vesperiigo Dobson, Catal. Chiropt. Brit. Mus., p. 183 (part). 1893. Noctulinia H. Allen, Proc. National Lluseum, xvi, p. 30, June 13, 1893. 1897. Pterygistes Miller, Ann. and Mag. Nat. Hist., 6th ser., xx, p. 384, October, 1897. 1899. Euvcsperugo Acloque, Fauna de France, Mammif^res, p. 32 (part, included noctula, leisleri, maurus, kuhlii, 'pipistrellus, and abrcmnus). 1907. Pterygistes Miller, Families and Genera of Bats, p. 207, June 27, 1907. 1908. Ni/ctalus Andersen, Ann. and Mag. Nat. Hist., 9th ser., i, p. 434, 'May, 1908. Type sjjecies.—Nyctalus verrucosus Bowdich. Geographical distribution.—Northern portion of Eastern Hemi- sphere from the Azores and Madeira to Japan. Characters.—Dental formula as in Pipistrellus; skull with nares extending unusually far back, half way to interorbital con-. a b c d Fig. 43. A'l/ctalus maximus (a), N. noctula (b), N. leisleri (c), and X. azoreum (d). Jfat. size. striction, and with large anterior palatal emargination ; fifth finger much shortened, scarcely exceeding metacarpal of fourth or third. Bemarhs.—This genus is well difierentiated from allied groups by the peculiar narrowing of the wing due to the shortness of the fifth finger. Three of the half dozen known species occur on the continent of Europe, while a fourth inhabits the Azores. - The most obvious character by which the European forms are dis- tinguished is the size of the skull (see fig. 43). KEY TO THE EUROPEAN SPECIES OP NYCTALUS. Condylobasal length of skull more than 17 mm.; fore- arm more than 45 mm.; hairs of back without dark bases. Condylobasal length of skull 22 to 23 mm.; forearm 64 to 68 mm. (Southern Europe) N. maximus, ^p. 244. Condylobasal length of skull 17 • 4 to 19 • 4 mm.; fore- arm 47 to 55 mm. (Distribution general) N. noctula, p. 245. Condylobasal length of skull less than 17 mm.; for
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