546 COL. TEiiBtEX AiTD MJt. o. THOMAS ON [June 18, 



are males, aud the one i-ed individual does not appear to differ from 

 the others in age or in the development either of its facial glands 

 or reproductive organs '. 



5. HiPPOSiDEKTJs TEiDENS, Geoflfr. 



a, h. Lahej. 3 and 27. III. 95, 



c-Z. Island in Eas Pakoum Bay, in cave. 6. IV. 95. 



Although only two specimens of this Bat were obtained at Lahej 

 it does not appear to be uncommon there. At the second locality 

 it was very plentiful. Each gravid female contained a single 

 foetus. 



6. Nycxems THEBAiCA, Greoffr. 



a-f. Lahej. 3. III. 95. 



g. Lahej. 6. III. 95. 



h-Tc. Lahej. 18. III. 95, 



This Bat was vei'y plentiful in the bungalow- at Lahej, and could 

 always be caught during the small hours of the night in the bath- 

 room with a butterfly-net. They fed ou various species of ortho- 

 ptera, a great number of wings of locusts and grasshoppers being 

 littered about the floor below where they had been hanging to the 

 rafters of the bath-room. This is an early flying Bat aud follows 

 (at Lahej) H. tridens soon after dusk. As usual, the gravid females 

 had each only a single foetus. 



7. ScoTOPHiLUS scHLiEFFENi, Peters. 

 a, h. Lahej. 12. III. 95. 



Three of these Bats came into the bungalow at Lahej about 8 p.m. 

 on the above date, two of which were caught in the butterfly-net. 

 This was the only occasion the species was met with. 



In using the word Scoiojihilus we provisional}' accept the opinion 

 of Dr. Harrison Allen as to the distinctness from each other of the 

 American and Old AVorkl members of the group, to which if united 

 the name Nycticejus M'oidd apply. 



8. Vespertilio (Leuconoe) dogalensis, Monticelli. 



No specimens of this Bat were met with, nor in fact any repre- 

 sentatives of the great genera Vesperugo or Vespertilio, in both of 

 which the whole Arabian region seems to be singularly poor. 



9. CoiEURA AFBA (Peters). 



a, b. Cave in island Eas Fakoum Bay (Little Aden). 6. IV. 95. 



c-j. Cave at Aden. 13. IV. 95. 



A few of these Bats were found ua the first of these localities — 

 a lofty cave with dii'ect communication with the sea, and with deep 

 water everywhere. Although a great number of Tri<xnops persicus 

 and Hipimsiclerus tridens were also found in the same cave, this 



1 Compare J. A. Allen, Bull. Am. Mus. N. H. vi. p. 248 (1892), where a 

 parallel variatiou in Chilonyctcris davyi issliown to be " independent of sex, age, 

 or season." 



