. A monograph of the bats of North America [microform]. Bats; Chauves-souris. 130 BULLETIN 13, UNITED STATES NATIONAL MUSEUM. maiuiiig tcith luiicli as in VcHperiHjo carolim-nniii, exiteptiug iu theliwt molar, wlieie a trace of the last limb of the second V is (li8cernil)lc. The drawinj^- exliibits (his rudiment a little lonjyer than ia the average. Mandibtilm teeth.—The lower incisor with third tooth (tohtiguous with second iucisor and with canine. The first premolar in lirm contact with the canine. In other respects the teeth are as in Vcsjjerugo carolincmh. Skull.—No trace of posterior teni
. A monograph of the bats of North America [microform]. Bats; Chauves-souris. 130 BULLETIN 13, UNITED STATES NATIONAL MUSEUM. maiuiiig tcith luiicli as in VcHperiHjo carolim-nniii, exiteptiug iu theliwt molar, wlieie a trace of the last limb of the second V is (li8cernil)lc. The drawinj^- exliibits (his rudiment a little lonjyer than ia the average. Mandibtilm teeth.—The lower incisor with third tooth (tohtiguous with second iucisor and with canine. The first premolar in lirm contact with the canine. In other respects the teeth are as in Vcsjjerugo carolincmh. Skull.—No trace of posterior tenijjoral crests or sagittal crests are seen. The anterior temporal crest is well defined. The mesenc('i)lia- Ion three and one-third times the length of the skull. No nasal ciiii- nence is seen; a shallrolonged, the posterior l ^ of the innomi- nate nearly horizontal. Sacrum composed of four elriments. Habitat.—Vespentgo hesperm ranges from the low, hot plains of Mexico npward into the Californian basin through the valley of the Colorado River and the surrounding country. Dr. Merriam informs me that it is never found in the mountains and the limit of its distribution is sharply limited to the lower ranges of hillsides and to the plains. According to the same observer (N. A. Fauna, No. 3, 1890, 37) V. hesperns is found in swarms in the Grand Cafion of the Colorado River. It inhabits the crevices of the clifls and is often found drinking from springs. " The flight of this si)ecics is so swift and zigzag that it is a very difficaU species to shoot in the rapidly failing light. Tiie young, as usual am(»iif; bats, fly more slowly and steadily and are li!ilanx 1 *Tho hard ptilate is depressed, Bancer-sbaped, t, c, is ec^ually concave ttom before backward and iium uidu to Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resembl
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Keywords: ., book, bookcentury1800, bookdecade1890, bookpublisherwashingtongpo
