590 Mr, J. C. Moultou on some of the principal Mimetic 



as an outlying member of the association ; for the male 

 (Fig. 15) does not mimic at all on the upper surface, while 

 the female (Fig. 16) is rather a rough mimic, the wings 

 being comparatively broad and the dark median band of 

 the hind-wing but feebly developed. The mimicry of the 

 under surf ice of the male Perrhybris is discussed by Dr. F. 

 A. Dixey in Trans. Ent. Soc. Lond., 1S94, pp. 286 and 320 ; 

 1896, pp. 67-72. It is characteristic of this genus, that 

 while invariably entering a Miillerian association, it never 

 presents more than a rough mimetic resemblance. The 

 peculiar serration of the inner border of the deep black 

 hind-wing margin in the female is discussed on p. 594. 



The moth (Pericopis) is also but a rough mimic; for in 

 it no black median band crosses the hind-wing, although 

 the marginal border is of much greater breadth, and thus the 

 unbroken dis(^al space of ground colour is barely noticeable. 



Evidence that members of this association frequent the 

 same locality and may be mistaken f(jr one another by the 

 captor, exists in the Hope Department, where one Melinasa 

 vmitata, two Heliconius tdchinia, and an example of the 

 moth, Pericopis angulosa, all taken in Honduras in 1895, 

 had been put together as a single species ! 



A geneiid survey of the association shows that the 

 closest resemblance exists between Melinxa imitata and 

 Heliconius telcliinia. A second pair — although not nearly 

 so close — is providetl by Lycorea atcrgatis and Eucides 

 zorcaon ; a third l>y Ceratiniadion/ea and Eresia pliilyra, $. 

 Lnstly, Dismurphia praxinoe $ presents a general resem- 

 blance to Mechanitis doryssus, Melinsea imitata and 

 Heliconius telchinia. The Perrhybris and moth are, as 

 jjreviously stated, only rough mimics of the same pattern. 



Combination I. a. 



The Guiana Type. British, Dutch and French Guiana. 

 A detailed account of this association is unnecessary; 

 for it has been described in much derail and illustrated 

 with many beautiful plates by Mr. W. J. Kaye, F.E.S. 

 (Trans. Ent. S-c. hoi.d., 19u6, p. 418). A Nymphaline 

 member, Eresia eunice, Hiibn., was however accidentally 

 omitted by tids naturalist, who has now kindly provided 

 me with the ioHowing interesting note on it: — " Up till 

 the date of my paper, October 1906 (Trans. Ent. Soc. 

 Lond., 1906, p. 413), I had received about twenty-five 

 gpt'Cimens of this species. None of the spdcimens show 



