( Ixvi ) 



the forest is not an old one. Indeed, I venture to suggest 

 that all this flat land was under water at no distant date. 

 I have definite proof that the lake has sunk well over 12 feet 



since not very long ago, when the island forests and yet, 



no, that won't do, because the island forests are also very 

 near the present water level. I collect in the forest along 

 about a mile of partly cleared wood (very fortunate in finding 

 this). The meeting-point of parallels 1° 10' S. and 31° 30' E. 

 hits off the locality to within a couple of miles. 



" Well, from the difference in the vegetation I expected to 

 find butterflies I had not met on the islands, and I am not 

 disappointed. 



" Pierinae. — The plains are extraordinarily rich in Pierines. 

 The most abundant is a greenish white one without markings 

 of any kind closely resembled by one with faintest black spots 

 below [probably both are forms of the c? Pinacopenjx pigea, 

 Boisd., and P. vidua, Butl.]. These congregate by hundreds 

 at marshy spots, and make a very wonderful sight when they 

 are disturbed. Among them are various species with the 

 underside boldly spotted with black, and bright orange at 

 the costal margins [probably species of Belenois, Mylothris, etc.]. 

 I expect some of these are mimics, but am very ignorant of 

 the Pierines. (There is an excellent little ' Blue ' [Phylaria 

 cyara, Hew.] which has the underside very nicely mimetic 

 of these whites — quite an exceptional type of underside for 

 a Lycaenid — and it drinks with them.) Then the orange-tipped 

 Teracoli are met with [all sent were T. evippe, L.]. 



" Colias electa, L., abounds, and I think its pale-coloured 

 female [$ form aurivillius, Kef.] more abundant than the 

 type [13 cJcJ- 4 type $ ?, and 19 pale $ ? were sent]. I have 

 got 3 in cop. In the forest those feebly flying species (like 

 sinapis) abound [Nychitona medusa, Cr.], but except for size 

 I can see no distinctive differences. As some are at least 

 twice as big as the others I take them to be different. Terias, 

 also, is common, and I have 4-5 species [3 were sent — regidaris, 

 But!., senegalensis, Boisd., and hrigitta, Cr.]. 



" It is a wonderful sight to see the enormous number of 

 Pierines that congregate at a pool at the edge of the forest 

 where I collect, or to see a steady stream pursuing each other 



