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be new species, and as unfortunately they add to their rarity 

 and value by being unique specimens, I have thought it 

 advisable to send them to England for Listing preservation in 

 some well-known entomological museum, whore they will be 

 safe from the ravages of a tropical climate and at the same 

 time easily available for inspection and study. With this end 

 in view it seemed a good opportunity first to draw attention 

 to the meaning of the coloration exhibited by these insects, 

 and so I am asking my friend and former teacher, Professor 

 Poulton, to be kind enough to exhibit the little collection on 

 my behalf at one of the meetings of the Entomological Society 

 before giving them a permanent place in the Hope Collection, 

 lxxiv] 



" Before proceeding further, mention must bo made of an 

 extensive memoir by Mr. li. Shelford, which appeared in the 

 Proceedings of the Zoological Society of London for 1902 

 (pp. 230-284, plates xix-xxiii), on the subject of 'Mimetic 

 Insects and Spiders from Borneo and Singapore.' As his 

 account in a general way covers certain of the instances 

 mentioned here, the following notes may be regarded simply 

 as a humble supplement to that memoir. 



I. Mimetic Lepidoptera. 



"1. Moth (Fam. Ccdlidididae) mimicking a butterfly (Fara. 

 Hesperidae). 



" The moth in this case is Callidula abisara, Moore, a common 

 day-flying species, which flies low and slowly for short dis- 

 tances, frequenting shady jungle paths or half sunlit patches 

 in mountain forests. The yellow chrome underside is un- 

 doubtedly procryptic and is not noticeable in flight, though 

 when at rest the wings are folded perpendicularly over the 

 head and body, and the insect becomes invisible. The upper- 

 side, it will be noticed, has a simple pattern consisting of a 

 dark tawny- fuscous ground-colour relieved in the fore-wing by 

 a conspicuous subapical orange bar. 



" The Hesperid (Koruthaiolos zanites, Butl.) has exactly the 

 same pattern on the upperside, but its underside resembles the 

 upper, and possesses the usual dark ground-colour typical of 



