368 L. de Niceville & Dr. L. Martin — Butterflies of Sumatra. [No. 3, 



(Tijd. voor Eat., vol. xxiii, pp. xiii and xiv (1880). Alpheraky has figured 

 this aberration in Romanoff's " Memoires sur les Lepidopteres," vol. v, 

 p. 220, pi. xi, fig. 3, female (1889), from Teneriffe. Mr. Moore records 

 this " species " from Singapore ; it is almost as common as D. chrysippus 

 in the plains of Sumatra. I am unable to consider D. alcippoides, 

 Moore, Proc. Zool. Soc. Lond., 1883, p. 238, n. 3, pi. xxxi, fig. 1, male, 

 as an aberration even to be distinct from the D. alcippus of Cramer. 

 It is true that the oblique subapical series of spots on the forewing, 

 especially on the underside, appears to be somewhat broader in 

 Oriental than in African specimens (I have, however,' only Cramer's 

 figure of the African form of D. alcippus to guide me), but all the 

 other characters given by Mr. Moore to distinguish between the two 

 forms are so obviously variable even in Sumatran specimens that they 

 can have no specific value. I hold that _D. alcippus is an occasional 

 aberration or "sport" only of D. chrysippus, certainly not a distinct 

 species. Dr. Martin duriug the first years of his residence in Sumatra 

 from J 882 to 189 J, as also Dr. Hagen, never saw D. alcippus, the 

 first specimens appearing in 1892 near Selesseh, immigrating into 

 Deli from the north-west. Since that year the true D. chrysippus 

 has become rarer and rarer, and the aberrational form has become 

 more and more common. 



10. Danais (Salatura) intermedia, Moore. 



Salatura sumatrayia, Moore, Proc. Zool. Soc. Lond., 1883, p. 242, n. 8. 

 Moore as sumatrana. Hagen as genutia. Very common in the 

 plains of Sumatra. It is, I think, a very remarkable fact that 

 1). plexippus, Linnreus,* which is a common species in the Malay 

 Peninsula, should not be found in Sumatra, but be replaced by D. inter- 

 media, which latter in the Malay Peninsula is probably only an aber- 

 ration or "sport "of D. plexippus, but has become fixed as a distinct 

 species in Sumatra. In my collection from the Asiatic mainland I 

 have every gradation between typical D. plexippus and D. intermedia. 

 I am quite unable to find any character by which to separate D. suma- 

 trana, Moore, from D. intermedia, Moore. 



* Mr. W. F. Kirby has recently shewn in " Allen's Naturalist's Library. Lepi- 

 doptera," vol. i, p. 19, pi. v, fig. 1, male (1894.), that the butterfly which has for the 

 last fifteen years or so gone under the name of Danais genutia, Cramer (1779), must 

 revert to the name by which it was previously almost universally known, viz., Danais 

 plexippus, Linnaeus (1758), which latter was described as having a white band 

 on the forewing like D. chrysippus, Linnams, a character not found in any 

 American species of Danais, D. pletippus havhig been origiually erroneously 

 described from America. 



