210 Dr. F. A. Dixcy on (he 



esting to observe that just as the members oi the South 

 American mimetic associations undergo a simultaneous 

 change corresponding to a different locality, so does the 

 Delias-Huphina combination in all three of its members 

 alike. 



The Huphina in the islands of Lombok, Sumbawa and 

 Flores which represents H. laeta of Timor is H. temena 

 Hew. (fig. 8). The Delias corresponding to D. splendida 

 is D. oraia (fig. 7), and the Delias answermg to D. doJiertyi 

 is D. sumbawuna (fig. 9). In all three of the Lombok, 

 Sumbawa and Flores assemblage, the uniformly black 

 fore-wing of the Timor butterflies is replaced by a pale 

 ground-colour streaked with black (the black streaks being 

 nervular in the Huphina and internervnlar in the two 

 Delias) ; the scarlet costal streak is also less definitely 

 black-bordered in //. teme?ui and D. oraia than in H. laeta 

 and D. splendida; while the marginal scarlet spots have a 

 more strongly-marked dark Ijoidering in H. temena and 

 D. sumbawana than in H. laeta and D. dohertyi, their counter- 

 parts in Timor. 



Finally, in the island of Suniba occurs another repre- 

 sentative of H. laeta; viz., H. julia Doliert. (fig. 11), 

 another of Doherty's discoveries. Along with it is found 

 a Delias, D. fasciata Roths, (fig. 10), which bears the same 

 relation to H. jidia as D. sumbawana to H. temena. A 

 Delias corresponding to D. splendida and D. oraia has, 

 so far as I am aware, not yet turned up in Sumba, but it 

 may be not too rash to anticipate that a model may some 

 day be found to account for the scarlet costal streak in 

 //. julia, which is absent from its associated Delias. 



Attention may likewise be drawn to the three New Guinea 

 butterflies whose undersides are represented in Plate VI, 

 figs. 1, 2 and 3. Here again we have an association between 

 a Delias {D. ornytion Godm. and Salv., fig. 1) and a Hiiphina 

 {H. ahnormis Wallce., fig. 3). In this case the company 

 is joined by a Nymphalhie, Mynes dorycu Butl. (fig. 2). 

 As I have dealt somewhat fully with these butterflies in a 

 recent paper (Trans. Ent. Soc. Lond., 1918, pp. 118-129), I 

 need say no more about them on the present occasion, except 

 to notice the fact, previously alluded to, that in the ordinary 

 position of rest, with the fore-wings depressed, the scarlet 

 streak on the hind-wing of the Mynes will be found to 

 correspond more or less exactly with the similarly coloured 

 streak on the fore-wing of the Huphina, and the scarlet 



