244 FAUNA SIMAJ.URENSIS : 



This specimen is very damaged by a shot; the anterior 

 wings are totally pierced and so the pattern is not well 

 visible. The blue subcostal band is larger than that in 

 the specimens from Java. 



3. Chrome arcesilaus Fabr. var. hesa Hew. cf- ^o- 6007. 

 Hab. Pulu Babi, 4/1913. 



Fam. Nymphalidae. 



4. Cethosia hypsea Doubld. Hew. nov. var. nigrescens. cT. 

 No. 6008. 



Hab. Sinabang (Simalur), '7/1913. 



Size, shape and further habitus is that of C. gahmia 

 Weymer, which I think to be also a variety of hypsea. 

 Between C. cyane Dru. and C. iJenthesilea Cram, is no 

 macroscopical difference in the genitalia, but certainly it 

 exists between cyam and hypsea. The male copulatory-appa- 

 ratus of yahima and of nigrescens do not differ from that of 

 hypsea^ so that I like to regard the specimen from Simalur 

 as a variety of hypsea. Yet the pattern is quite different : the 

 yellowish band on the anterior-wing is absent, so that this 

 wing is nearly black except a triangular red part near 

 the hind-margin. The upperside of the posterior-wing is 

 like that of gabinia, only the semi-orbicular figures in the 

 black margin are quite indistinct. 



On the underside the pattern is like that of gahinia 

 with more black lines where gahinia has stips. In the 

 semi-orbicular "figures of the margin are stips instead of 

 small lines between the nervules. 



Gahinia lives on the island Nias and so it is important, 

 that on a neighbouring island once more is another form 

 of hypsea. I have also compared my nigrescens with mate- 

 rial of hypsea from Java till Malacca and with one spe- 

 cimen of hypsina Feld. from Riouw. 



The result of my microscopical researches will be published 

 later on, with figures of some butterflies from Simalur. 



Notes from the Leyden M-useum, "Vol. XXXV, 



