84 CERA2L [chap. xxv. 



specimen of Papilio gambrisius, of whicli I liacl liitherto 

 only found the males, which are smaller and very different 

 in colour. Descending the other side of the ridge, by a 

 very steep path, we reached another river at a spot which 

 is about the centre of the island, and which was to be our 

 resting-place for two or three days. In a couple of hours 

 my men had built a little sleeping-shed for me, about eight 

 feet by four, with a bencli of split poles, they themselves 

 occupying two or three smaller ones, which had been put 

 up by former passengers. 



The river here was about twenty yards wide, running 

 over a pebbly and sometimes a rocky bed, and bordered 

 by steep hills with occasionally flat swampy spots be- 

 tween tlieir base and the stream. The whole country 

 was one dense, unbroken, and very damp and gloomy 

 virgin forest. Just at our resting-place there was a little 

 bush-covered island in the middle of the channel, so that 

 the opening in the forest made by the river was wider 

 than usual, and allowed a few gleams of sunshine to 

 penetrate. Here there were several handsome butterflies 

 fly nig about, the finest of which, however, escaped me, 

 and I never saw it again during my stay. In the two 

 days and a half which Ave remained here, I wandered 

 almost all day up and down the stream, searching after 

 butterflies, of which I got, in a]], flfty or sixty specimens, 

 with several species quite new to me. There were 



