BUTTERFLIES OF MOUNT PEXRISSEN. 33 



(27) Chersonesia rahria (Horsf and Moore). 

 Fam. Lemoniidce. 



Sub fam. Nemeobiince. 



(28) Zemeros dlbipunctata (Butl.) 

 Fam. Lyccenidcp. 



(29) Neopithecops zed mora (Butl.) 



One example with a white discal patch on the upperside of 

 the forewing. Specimens, corresponding to the wet and 

 dry season forms of this species in India, occur in Bor- 

 neo, but occur quite independently of the season. A so- 

 called wet season form may be captured in the S. W. 

 monsoon and vice versa; the same is also true of the 

 Satyrid Melanitis ismene (Cram.) ; of this species the 

 Sarawak Museum possess a long series of the typical 

 form and another of the form leda (L.) captured in nearly 

 every month of the year, and all within a radius of two 

 miles of Kuching. The difference between the wet and 

 dry seasons is not nearly so well-marked in Borneo as in 

 India, and I imagine that the colouring of butterflies exhi- 

 biting seasonal changes is determined by the state of the 

 weather during the early stages of the life history, so 

 that a wet August (for example) would produce the 

 wet-season form, a dry August the dry-season form ; in 

 Borneo, at least, these forms should rather be called 

 weather-varieties, occuring as they do, independently of 

 the seasons. 



(30 J Cyaniris placidula (Druce). Previously recorded from 

 Kina Balu. 



(31) Cyaniris sehna (Druce). 



Upperside-forewing, pale blue with a white discal patch and 

 with broad black costal and outer margins. The cell is 

 closed with a small black stigma. Hindwing, greyish blue. 

 the cell is closed with a stigma. A marginal series of 

 fuscous spots. Underside, exactly as in male. 



