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Genus LASIURUS Gray. 



1831. Znsiurus Gray, Zoological Miscellany, No, 1, p. 38 (based on the American liairy- 

 tailed bats). 



1861. Lasiiinis H. Allen, Monogr. X. Am. Bats. p. 11. 



1870. Atalaplia Peters, Monatsber. K. Akad. Wiss., Berlin, p, 907. (Xot Atalapla Rafi- 

 nesf^ne, isil.) 



1878. 'Atalapha Dobson. Catal. Cliiroptera Brit. Mus., p. 267. ot At o Icq)]! a Ratinesque, 

 1811.) 



1893. AtaJapTia H. Allen, Monogr. Bats X. Am., p. 111. {^ot Aiahqjlia Rafmesque, 1811. ) 



Type species. — Lasiuriis horealis (IMiiiler . 



Geographic distribution of genus. — The whole of Xortli America and 

 South America, the West Indies, Sandwich Islands, and Galapagos 

 Islands. 



1-1 1-1 2-2 3-3 

 Generic characters. — Dental lormula: c, ^ ; pm, c^-cy', g-o=32; 



upper incisor in contact with canine; a minute upper premolar at base of 

 canine on inner (lingual) side ; dental formula otherwise as in Dasypterus^ 

 Nycticeius^ and Rhogel'ssa; skull (hgs. 28, 29,31) broad, short and deep, 

 very different in foim from that of any other Xorth American genus 

 of Vespertilioniike except JJasyptenis; ear (fig. 27) broad, blunt, and 

 rounded at tip, hairy on most of dorsal surface; dorsal surface of inter- 

 femoral membrane furred nearly to extreme edge: mammie, 1. 



The members of tbe genus Lasiurus are recognizable among Xorth 

 American bats by their thicklj' furred interfemoral membranes. Two 

 •distinct species are kin)wn to occur north of Panama; one of these is 

 divisible into at least five well-marked geographic races. 



KEY TO XOKTH AilERICAX FOE^S OF LASIURUS. 



Size large (forearm more than 50 mm.) ciiiereus ip. 112) 



Size small (forearm 36-11). 



Underside of wing membrane very sparsely haired along forearm. m( .r/crn!?/s (p. Ill) 

 Underside of wing membrane thickly furred immediately back of forearm. 



Ear small and with slightly developed external basal lobe lelioHs (p. 110) 



Ear large and Avith well-developed external basal lobe. 



C(dor mahogany In'own seminolus (p. 109) 



Color varying from deep rich cherry red through orange and 

 yellow to light yellowish gray. 



Color deep rich cherry red, forearm 12-11 pfeifferi (p. 110) 



Color varying from yellowish gray to light red, forearm 



36-43 horealis (p. 10.5) 



LASrURUS BOREALIS (iliiller). Red Bat. 



1776. Vespertilio horeaJis Mllller, X'atursyst. Snppl., p. 21. 



1777. VesperUVio novehoyaccnsls Erxleben. Syst. Regui Anim., I, p. 155. 



1781. VespertUio lasiurus Schreber, Siingthiere, Abth. 1. Taf. LXII B (published with 



Abth. IV Heft 1. See Sherborn, Proc. Zool. Soc. London, 1891. p. 589). 

 1785. Vesperiilio uorehoracus Boddaert. Elenchiis Animalium. L p. 71. 

 1785. Vespertilio lasiirus Boddaert. Ei;'nchus Aniuialinm. I, p. 71. 

 1796. Vespertilio ruhellns Palisot de Beauvois, Catal. Peale's Museum, p. 201. 



