478 MR. O. THOMAS ON THE MAMMALS [DeC. 4, 



breadth 9*8 ; interteinporal constriction, breadtli 2*0 ; front of upper 

 canine to back of m.'^ 6'8. 



This Bat is evidently more nearly allied to Hipposiderus than to 

 either Trianops, Rhinonycteris, or Coelops, although the last-named 

 is the only one of the subfamily that agrees with it in the rudimen- 

 tary state of the tail. To no particular member or group of Hip- 

 posi'lerus, however, does it show any special affinity, since its agree- 

 ment with Asellia'va the emarginate state of the posterior nose-leaf 

 is probably no evidence of genetic relationship, the differences between 

 it and that subgenus in the essential structure of the nose-leaf and in 

 the reduction of the tail being quite as marked as in the case of the 

 other members of the genus Hipposiderus. 



The presence of a peculiar insectivorous Bat in Guadalcanar is a 

 most interesting and unexpected fact, since, as a general rule, oceanic 

 islands are characterized by the large proportion and great specialty of 

 their frugivorous as compared with their insectivorous Bats, a general 

 rule otherwise well exemplified in the Solomon Islands, as shown 

 below in the table, p. 483. 



12. Hipposiderus tricuspidatus, Temm. 

 a,h. 6 2- Aola. [10.] 



Forearms 37 and 40 millim. respectively. 



13. Hipposiderus diadema, Geoffr. 

 a,b. $ . Aola. 



c. (S . llubiana. 



These specimens differ in size to a remarkable extent, the forearm 

 in both a and b being 79 millim. long, while in c it is no less than 

 96. Other specimens in the Museum collection, however, connect 

 these two extremes, and show that the difference in size cannot be 

 looked upon as a specific character. Thus a Cinghalese female has a 

 forearm 94 millim. long; several specimens have them about 86 or 

 88 ; a male from the Philippines one 82 long, while a female from the 

 same locality has one only 76, this latter being the least observed in 

 adult animals. 



14. Hipposiderus cervinus, Gould. 



2 . Aola. [5.] 

 Forearm 44 millim. 



15. Vesperugo abramus, Temm. 

 a. $. Aola. [11.] 



Forearm 33 millim. 



16. Miniopterus schreibersi, Kuhl. 



a, b. c? 5 . Aola. 



These specimens belong to one of the small races of this widely- 

 spread species, their forearms measuring only between 40 and 41 

 millim., exactly as in tlie forms called " M. schreibersi, var. pusillus," 

 and " M, australis " by Dobson \ Their characters are on the whole 



' Cat. Chir. B. M. p. 351 (1878). 



