Ixiv 



There could be no doubt that, as Mr. Sanderson states, all 

 the species would resemble each other upon the wing; for 

 the deep red of the Delias would then be the least conspicuous 

 element in its pattern, while the general distribution of the 

 black and blue-grey on all wings and yellow upon the hind, 

 is similar in the Pierines and Geometers, the resemblance 

 being heightened during flight by the likeness between the 

 patterns of upper and under surface. In the male Chalcosiine 

 mimic, however, the resemblance depends almost entirely 

 upon the under surface where alone is developed the essential 

 feature contributed by the yellow. The female PsapMs 

 camadeva, with the yellow markings strongly developed on 

 both surfaces, was very similar to CanerJces scotais, Jord., 

 and the larger species, C. euschemoides, Moore, all three being 

 close mimics of Dysphanias. C. euschemoides, from Assam 

 and " India," resembled D. excuhitor, Moore, and the Indian 

 form of D. militaris, L. ; C. scotais, Jord., from Borneo^ — 

 D. suhrepleta, Walk. ; the female of P. camadeva in Malacca, 

 Borneo and probably in Java — D. suhrepleta, and in the 

 Philippine Islands — the allied D. plena. Walk.* 



Although during flight, the female P. camadeva would 

 resemble D. glaucescens and, far more closely, D. militaris, it 

 was probable that the better model D. suhrepleta and 

 perhaps other Dysphanias would be found to accompany the 

 Delias in their migratory flights in Selangor. 



The existence of any significant likeness between these 

 Geometers and Delias had never been hinted at before, and 

 it was especially interesting that its recognition had been pre- 

 ceded and indeed suggested by the observation of associated 

 habits and resemblance during life. 



The combination was typically Miillerian, Psaphis belonging 

 to a specially protected Family and Subfamily, t Dysphania 



* The resemblance of these Chalcosiine mimics to Dysphania 

 {Euschema) is well knowTi, as the name euschemoides clearly shows. 

 Erich Haase speaks of this species as a mimic of Enschema militare, L., 

 and C. seyniplena, viz. Psaphis camadeva, female, from Minahassa, of a 

 Euschema, doubtless D. plena, from the same locality. (" Researches 

 on Mimicry, etc.," Pt. II, English trans., Stuttgart, 1896, p. 38.) 



t Hampsonia pulcherrima, Swinh., from the Khasia Hills, allied to 

 Psaphis and Canerkes is apparently as extreme an instance of Warning 

 Colours as any known among insects. The ground-colour is black with 



