1906."] Allen, Mammals from Hainan, China. 487 



35. Murinus cyclotis Dobson. 

 One specimen, adult female, Youboi, June 21, 1904. Forearm, 



33- 



This specimen agrees satisfactorily in nearly all particulars with 

 Dobson's description and figures of M. cyclotis, from Darjiling, in the 

 Himalaya. The fur, however, is not very distinctly bicolor, the bright 

 rufous extending nearly the whole length of the hair on the dorsal 

 surface, only the extreme base showing a darker, brownish shade; 

 below a lighter, more yellowish brown to the base of the fur. The 

 present specimen (dry skin) has a smaller ear (14 as against 15.3 mm.) 

 and a shorter tragus (7.5 as against 9), a longer thumb (metacarp. 5 

 instead of 2.5; ph. 7 without claw, 8.5 with claw, instead of 5), and 

 apparently a longer tibia (17 as against 15.2). As some of these 

 discrepancies may be more apparent than real, due to the measure- 

 ments being taken in the one case from an alcoholic specimen, and in 

 the other from a skin, it seems best provisionally to refer the present 

 specimen to cyclotis; there is a close agreement in dentition, size, 

 color, the hairiness of the interfemoral membrane and feet, etc., not- 

 withstanding the great geographical separation of the two localities, 

 Hainan and the Himalaya. A single specimen (" 9 imm. "), however, 

 has been recorded by Dobson from Ceylon. 



36. Pipistrellus portensis sp. nov. 



Type, No. 26797, ad. tf , Porten, Hainan, July 4, 1904. 



Similar in the form of the ear and the structure of the incisors and premolars 

 to P. tennis Temminck, from "Sumatra, Java, and Borneo," as described by 

 Dobson (Cat. Chirop., 1878, 226), but much larger. 



Color above (adult, type) dark reddish brown, the short, fine fur colored 

 uniformly to the base ; underparts rather lighter and duller ; membranes black ; 

 ears small, obtusely pointed, the outer margin nearly straight; tragus rather 

 narrow, of nearly even width almost to the obtusely rounded summit, with a 

 small lobule at the outer base; tail pointed, the greater part of the last vertebra 

 exserted; wings from the ankles; well-developed post-calcareal lobules. 



Head and body (from a well-made skin, the type), 42 ; tail, 27 ; forearm, 32 ; 

 ear, 9 ; tragus, 4; tibia, 12; foot, 7. Forearm, 12 specimens, 32 (31-33). Great- 

 est length of skull, 12, to tip of incisors, 13; greatest width of braincase, 6.8; 

 length of lower jaw, 9 mm. 



The species is dimorphic, having a dark reddish brown phase and a nearly 

 black phase ; rather more than one-half of the adults and about one-third of 

 the immature specimens are in the brown phase, the remainder in the dark 

 phase, varying from deep black to brownish black. 



Represented by 28 specimens, of which n are adult and 17 more or 

 less immature. The series of immature specimens, in which the phalan- 



