Rhinolophus arcuatus angustifolius, Sanborn, 1939

Sanborn, Colin Campbell, 1939, Eight New Bats Of The Genus Rhinolophus, Zoological Series Of Field Museum Of Natural History 24 (5), pp. 37-43 : 43

Rhinolophus arcuatus angustifolius subsp. nov.

Type from Wetter Island, Southwest Islands, Flores Sea , Dutch East Indies. No. D, 1371 Rijksmuseum van Natuurlijke Historie, Leiden. Adult male in alcohol. Collected June 7, 1898, by Dr. Schardler.

Characters.— Like arcuatus from the Philippines but lancet and horseshoe a little narrower and sella much narrower, 2.1 at base against 3.5 in arcuatus . Tail the same length as tibia instead of being shorter. In this character it approaches toxopei , in which the tail is longer than the tibia. Wing structure as in arcuatus .

Skull as in arcuatus but upper premolar two half external, the canine and premolar three being separated by a narrow space. Nasal swellings converging as in arcuatus , being narrower across top than in beccarii.

Measurements.— Forearm 46.6; third finger, metacarpal 35.2, first phalanx 14.1, second phalanx 22.3; fourth finger, metacarpal 35.7, first phalanx 9.7, second phalanx 13.6; fifth finger, metacarpal 36.5, first phalanx 10.3, second phalanx 12.3. Ear 22; tail 21.6; tibia 21.6. Skull: greatest length 20.1; condylo-basal length 16.8; palatal length 1.8; width across nasal swellings 5.2; interorbital width 1.7; zygomatic width 9.6; mastoid width 9.4; width of braincase 8.1; upper toothrow 7.8; width across canines 5.3; maxillary width 7.5.

Specimens examined.— One, the type.

Remarks.— This form represents an extension of the range of true arcuatus , being less aberrant than toxopei from Buru Island to the north. With arcuatus now known from Sumatra and Wetter Island, it should be found on intermediate islands or in the Celebes.