Mr. R. F. Tomes on the genus Nyctophilas. 381 



But the great difference in the size of the two animals is alone 

 sufficient to distinguish them, the one being only 9 inches in expanse 

 of wings, whilst the other attains fully 13 inches; nearly as great 

 a difference as exists between the Pipistrelle and the Noctule 

 Bats. 



The fur of the upper parts is bicoloured, nearly black at the base, 

 with the terminal half dark sepia-brown ; that on the top of the head 

 and on the membrane uniting the ears, unicoloured, and paler. 



Beneath, the fur has the basal half nearly black, the remainder 

 being light brown, palest on the throat, on the middle of the belly, 

 and on the pubes. On the shoulder of one example from " Perth, 

 Western Australia," is a patch of brownish rust-colour, but it does 

 not occur in the other examples. 



Although the original specimen of this species is reported to have 

 been received from Timor, I am inclined to believe that there may have 

 been some mistake respecting its locality. Among a great number of 

 Bats from that island contained in our museums and that of Leyden, 

 representatives of this genus do not appear ; but specimens absolutely 

 identical with the original in the Paris collection have been obtained 

 by Mr. Gould in Western Australia ; and I have noted one in the 

 Leyden Museum, also from Australia, but without any precise in- 

 dication of locality. 



The following dimensions have been taken from specimens col- 

 lected by Mr. Gould, the first being the one from Perth, Western 

 Australia: — 



1. 2. 



in. lin. in. lin. 



Length of the head and body, about ..30 24 



of the tail 1 \0\ 1 10 



of the head 10 10 



oftheears 10 10 



of the tragus 3^ 3^ 



of the fore-arm 1 9 1 9 



of the longest finger 3 4 3 2 



of the fourth finger 2 4 2 5 



of the thumb 4^ 4 



of the tibia 9 9 



of the foot and claws 5 5 



of the OS calcis 7 8 



Expanse ofwings,following the phalanges 13 6 12 9 



3. Nyctophilus Gouldi, n. s. 



The present species is intermediate in size between the two last, 

 and at first sight might be taken either for a small individual of N. 

 Timoriensis, or a large one of N. Geoffroyi ; or these two might be 

 regarded as the large and small varieties of the same species, and 

 the present one as the intermediate or connecting link. This opinion 

 I was at first disposed to entertain ; but after the examination of a 

 greater number of examples, and more especially after extracting 



