Ixviii 



find them taking part in the same flight, and at a point so 

 far to the south of the usual range of D. fyramus. 



' A curious confusion has arisen with regard to D. ninus 

 and another related form, which I may be allowed to take this 

 opportunity of noticing. Mr. Wallace's original description 

 of ninus had associated with it the figure of another species, 

 D. parthenope, while his description of parthexope was illus- 

 trated by figures of the upper and underside of ninus (Trans. 

 Ent. Soc. Lond., 3rd series, IV, p. 347, Plate VI, figs. 5, 5a; 

 Plate VII, fig. 1). This mistake, corrected by Von Mitis 

 (Systematisches Verzeichniss der Arten des Genus Delias 

 Hiibn.; " Iris," 1893, pp. 100, 117-122), by Mr. Butler in his 

 Revision of the genus (Ann. Mag. Nat. Hist., 1897, pp. 163, 

 165), and by Mr. J. C. Moulton (List of the Butterflies of 

 Borneo, Part IV, Nos. 564, 566; Journal of Royal Asiatic 

 Society, Straits Branch, No. 67, December 1914), is passed 

 over by Fruhstorfer in Seitz's work, and had not been rectified 

 at the date of Mr. Distant's RJiopalocera Malayana (1882- 

 1886). The latter author accordingly gives under parthenope 

 (p. 291, Tab. XXIV, fig. 4) a description and figure which are 

 those of ninus; while under ninus he reproduces Wallace's 

 description of ninus, together with Wallace's figure called by 

 Wallace ninus, but really representing that author's parthenope, 

 a form of the nearly allied D. aglaia Linn. I am indebted to 

 Dr. Jordan for drawing my attention to the fact that the 

 interchange of Wallace's figures was first detected by Von 

 Mitis (toe. cit.). 



The substance of the preceding paragraph may be sum- 

 marised as follows : — 



Wallace's description of ninus is ninus. 



His figure of ninus is parthenope. 



His description of parthenope is parthenope. 



His figure of partJienope is ninus. 



Distant's description and figure of jxirthenope are ninus. 



His description of ninus (quoted from Wallace) is ninus. 



His figure of ninus (reproduced from Wallace) is parthenope. 



The colour of the larva op Smerinthus ocellatus, 

 ON WILD crab. — Prof. PouLTON said that during the past 

 September he had had the opportunity of confirming his early 



