. Smithsonian miscellaneous collections. leaves, rather short, somewhat pointed ears and tails reach-ing to about the middle of the naked, moderately developed inter- 194 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 femoral membrane. The forearm is distinctly furred along outerside near base. No facial stripes are present. The skull is massive,with short rostrum and moderately developed sagittal crest; in theincomplete zygomatic arches it resembles that of Lonchophylla, butdiffers widely in other respects. The teeth are $2 in number. HEMIDERMA PERSPICILLATUM AZTECUM (Saussure) Short-tailed Ba
. Smithsonian miscellaneous collections. leaves, rather short, somewhat pointed ears and tails reach-ing to about the middle of the naked, moderately developed inter- 194 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 69 femoral membrane. The forearm is distinctly furred along outerside near base. No facial stripes are present. The skull is massive,with short rostrum and moderately developed sagittal crest; in theincomplete zygomatic arches it resembles that of Lonchophylla, butdiffers widely in other respects. The teeth are $2 in number. HEMIDERMA PERSPICILLATUM AZTECUM (Saussure) Short-tailed Bat Carollia azteca Saussure, Rev. et Mag. Zool., Ser. 2, Vol. 12, pi. 20, fig. I,p. 480, i860. Type from southern Mexico. The short-tailed bat is robust, medium sized, and has rather largefeet. It varies from dark brown to rusty in color. The forearmmeasures about 42 millimeters. A much rarer species, Hemidermacastaneum, sometimes inhabiting the same places, is distinguished bysmaller size, the forearm being about 5 millimeters Fig. 13.—Hemiderma perspicillatum aztecumNo. 179811, U. S. Nat. Mus. About nat. size. Hemiderma p. aztecum is the bat most frequently met with inPanama. Numbers may be found resting during the day in almostany dark sheltered places, such as caves, tunnels, or the darkenedcorners of old buildings. Near Bas Obispo a colony of several thousand short-tailed batswas located in a tunnel driven by the French for the diversion of asmall river. Here they hung in massed clusters from hollowed placesin the rock roof about 15 feet above the water. Near the entrancesto the same tunnel were smaller numbers of Chilonycteris rubiginosa. At Corozal these bats were associated with Glossophaga soricinaleachii in a half-dark concrete tunnel roofed squarely over. Theywere attached to roughened places in the concrete, their bodies incontact with the wall, and their heads turned partly outward. Following directions given me by Col. D. D. Gailliard, and accom-panied
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