On HipposiJenis diaclema and its closest Allies. 497 



LVI. — 071 Hipposiderus diadema and its closest Allies, 

 By Knud Andersen. 



Hipposiderus diadema, Geoffroy. 



Diagnosis (as compared with the three species described 

 below). — Anteorbitalwidth"^ of skull between 8*5 and 10 mm.; 

 upper tooth-row (exclusive of incisors) ir3-13"2 mm. 

 Ears moderate : width 24-27-5 mm.; forearm 75'5-91 mm. 



Range. — The Indo- and Austro-Malayan Subregions, 

 exclusive of Bftchian. 



Hipposiderus diadema oceanitis, subsp. n. 



Diagnosis. — Anteorbital width 8*5; upperteeth ir3-121. 

 Forearm 78-8-79-2. 



Details. — Of all the local representatives of the diadema 

 type, this form has the slenderest skull and the shortest 

 tooth-rows. But in both of these respects it is almost, or 

 completely, matched by the smallest individuals of H. d. 

 griseus, from the Philippines, from which it, however, differs 

 by the somewhat shorter forearm (78"8-79'2 mm., as against 

 83-88). The three specimens of oceanitis at my disposal 

 evidently do not sIioav the extremes of individual variation 

 in size; the external dimensions of this form will, presum- 

 ably, prove to be very mucb as in H. d. pullatus from New 

 Guinea (forearm 75-81 ram.). 



The third (external) supplementary leaflet is smaller than 

 in the other forms of diaclema, sometimes so small that it 

 requires some attention not to be overlooked. 



Type. — ^ ad. (in alcohol). Aola, Guadalcanar, Solomon 

 Islands. Collected by C. M. Woodford, Esq. Brit. ]\Jus. 

 no. 88. 1. 5. 23. 



Range. — Solomon Islands : Guadalcanar ; Fauro. 



Hipposiderus diadema griseus, INIeyen. 



Diagnosis — Anteorbital width 8*6-9'2; upper teeth 12- 

 13-2. Forearm 83-88. 



Rai<ge. — Philippine Islands : Luzon, Catanduanes, Guima- 

 ras, Leyte, Mindanao (Mt. Apo; Zamboanga). 



* The width of the facial portion of the skull, across the front margin 

 of the orbits, immediately above the upper border of the infraorbital 

 foramina. — All the measurements recorded in the " diagnoses " and in the 

 table, p. '507, are of full-grown individuals. For explanation of some of 

 the measurements, see Ann. & Mag. Nat. Hist. (7) xvi. (1905) p. 248, 

 footnote. 



Ann. cV M<rg. X. Hist. Ser. 7. TW. xvi. 3.3 



