Rhinolophus thomasi latifolius, 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 : 39-40

Rhinolophus thomasi latifolius subsp. nov.

Rhinolophus sp . Osgood, Field Mus. Nat. Hist., Zool. Ser., 18, p. 219, 1932.

Type from Muong Moun , Tonkin, French Indo-China . No. 32230 Field Museum of Natural History. Adult female. Collected March 14, 1929, by R. E. Wheeler. Orig. No. 39.

Characters.— Like thomasi in size and wing structure, second phalanx of third metacarpal being more than one and one-half times the length of the first phalanx, and second phalanx of fifth metacarpal shorter than first phalanx. The parallel-sided sella is much wider than in thomasi , being 2.3 against 1.8mm., and the ear and tail are a little longer.

The skull has the same characters found in thomasi , being short and relatively broad, with maxillary width greater than length of upper toothrow; total length between four and four and one-half times supraorbital length, with low nasal swellings; the teeth are slightly narrower. Upper premolar two is in the toothrow. Lower premolar three is external except in one specimen, where it is in the toothrow.

Measurements.— Type (paratypes in parentheses): Forearm 42.5 (42.6-45.7). Skull: greatest length 18.4 (18.2-18.7); condylo-basal length 15.7 (15.6-16); palatal length 2.1 (1.9-2.2); width across nasal swellings 5.1 (5.1-5.3); interorbital width 2.6 (2.5-2.5); zygomatic width 9.7 (9.2-9.8); mastoid width 9.2 (8.8-8.9); braincase 8 (7.6-8.1); upper toothrow 6.8 (6.8-7); width across canines 4.9 (4.6­ 4.9); maxillary width 7.3 (7-7.2).

External measurements of alcoholic specimen: Forearm 44.7; third finger, metacarpal 33.6, first phalanx 13.5, second phalanx 20.8; fourth finger, metacarpal 34.9, first phalanx 10.4, second phalanx 12.3; fifth finger, metacarpal 35.7, first phalanx 10.7, second phalanx 9.6. Ear 20; tail 24; tibia 18.

Specimens examined.— Total five. French Indo-China: Muong Moun, Tonkin, one male (type), one female (ale.); Muong Mo, Tonkin, three females.

Remarks— The wider sella will easily separate this form from typical thomasi . Rhinolophus thomasi was formerly known from the type locality only, Karin Hills, Burma, but. t. latifolius and the next form show that it has a wide range both north and south of Burma.