PTEUOPUS HYPUMi;i,AXrs EVGAXrS. 109 



silvery grey hairs ; but the greyish admixture is often so pre- 

 dominant as to make the general colour a darker or lighter hair- 

 brown clouded with seal-brown in the centre of the breast; in 

 other specimens a greater or less amount of the greyish hairs 

 have turned buff or ochraceous-biiff, making the total colour a 

 seal-brown or hair-brown more or less strongly, and more or less 

 extensively, suffused with buff, ochraceous-buft', or light russet. — 

 Mantle varying from bright hazel or bright russet through several 

 lighter tinges to yellowif-h ochraceous-buff ( $ ad., l-i0968) ; the 

 foreneck is always seal-brown or blackish seal-brown. — Crown of 

 head : a darker or lighter shade of hair-brown, dependent on the 

 smaller or greater amount of grizzling with silvery greyish white ; 

 in man)- specimens more or less strongly washed with huffy. 



The variation in colour is independent of the sex of the indi- 

 viduals (six males, eight females examined) ; thirteen of the 

 Bpceimens were obtained in Xovember, one in July ; teeth in 

 different stages of wear (from sliglitly worn to well worn). 



Measurements. On pp. Ill, 112. 



Specimens exiimined. Fourteen (nine skins), from the collections 

 of the U.S. Xafional* and British Museums. 



liatiije. Engano, with Pulo ])ua (one mile S.E. of Engano) and 

 Pulo Mirban {\\ miles S. of Pulo Dua) ; ? Mentawei Islands 

 (no specimens examined). 



Type in the U.S. National Museum (no. 140966). 



Pteropits e»ganiis,^\\\\cY ; lUOl!. — Type localit} : Pulo Dua, off 

 Engano. Described by Miller as " similar to Ft. hpidus, but 

 smaller, and with back darker than mantle : larger than Ft. hi/po- 

 mehtnus, Temm." It is true that in ein/amis the mantle is brighter 

 than the back, whereas in the normal, pale-coloured phase of 

 lepidus the mantle is much darker than the back ; but lepidua 

 is an unusually pale-backed form ; in all races of Ft. hi/pomeJanvs, 

 except lepidns and (/eminorum, the back is, as a general rule, 

 darker than the mantle, so that in this respect e»(fanus does not 

 differ from most other forms of the species. The statement that 

 emiauus is larger than luipomelan-us {i.e. Ternate individuals) ie 

 based on Dobsou's measurements (forearm 11 'J mm.) of what be 

 calls the " type specimen," but which is in reality not the type 

 of hifpomelfiims Temm. but of tricolor Gray, and this specimen is 

 immature ; as pointed out above, eiu/anus averages, on the contrarv, 

 in every respect smaller than any other known race of the species. 



liemark.^. — This form is undoubtedlj- most closely allied to 

 Pt. h. (jeminorwn, from the Mergui Archipelago. It accords with 

 yemiiiorum in the grizzled light grey and blackish-brown colour 

 of the back and head, and the generally dark (seal-brown) colour of 

 the l)reast and belh', sprinkled with light grey hairs; but it averages 

 smaller, the mantle is noticeably brighter, and there is a much 

 stronger tendency in en<iiniui to a russet or buff'y wash of the 

 colour of the upper and under side. So far as the available 



» Nos. 1 41 »'.iiW -(•>!', Hii«i()I-7<', l4*)<tT2. HllHta-i, 141007^; paiatvpee. 



