the Genus Nyctoplulus. 497 



Dimensions of the type (In spirit) : — 



Forearm 41 mm. (range 40-43). 



Head and body 54 ; tail 43; ear 23*5x15; third finger, 

 metacarpus 38, first phalanx 15*5; lower leg and hind foot 

 (c. n.) 27-5. Baculum 3-2. 



Skull : greatest length 17'7 ; condylo-basal length 15"8 ; 

 zygomatic breadth 10"6 ; palato-sinual length 6*5; maxillary 

 tooth-row 6'5 ; bulla 3*7. 



Hab. Nortii Queensland, within the tropics. Type from 

 Plerberton. Other specimens seen from Oooktown, Cloncurry, 

 Cape York, and Torres Straits Islands, about 20 in all. 



Type. Adult male. B.M. no. 15. 3. 13. 3. Original 

 number 5/,9. Presented by the Australian Museum, Sydney. 



This species, while readily distinguishable from all the 

 previous ones by its bifurcate baculum and small bullae, is 

 somewhat nearly allied to the next, JS. microtis. From that, 

 liowever, it differs by its rather larger size, heavier skull, 

 longer palate, and by the considerably greater stoutness of 

 its baculum. All five of the bacula I have examined are 

 of similar thickness, and contrast markedly with the slender 

 bone extracted from the type of N. microtis. 



6. Nyctophilus inicrotij^, Thos. 

 Ann, & Mag. N. 11. (6) ii. p. 226 (1888). 



Size rather smaller than in N. hifa.r. Ear short. Nose- 

 leaf of medium develo])ment. Skull smaller and more 

 slenderly built than in hifax. ]3aciilum essentially as in 

 bifax, but very much more slender. 



The typical skull has the palato-sinual length 5*3 mm., 

 maxillary tooth-row 5*6. A more perfect skull from the 

 Aroa River is measured below. Baculum 3*5. 



Hab. British New Guinea. 



Deceived by the indifferent material then available, I some- 

 what exaggerated in my original description the shortness of 

 of the ears of this bat. They are really but little shorter 

 than those of N. hifax, and do not indicate any near relation- 

 ship with N. walkeri. 



Of this species two colour races may be distinguished : — 



a. N. microtis microtis. 



Colour brown, about as in N. hifax; under surface not, or 

 scarcely, lighter than upper. 



Hah. Sogere, Owen Stanley Range. 

 Type. B.M. no. 88. 4. 14. 1. 



