370 CELEBES. [chap. xvi. 



obtained an insect which I had hoped hut hardly ex- 

 pected to meet with — the magnificent . Papilio androeles, 

 one of the largest and rarest known swallow-tailed 

 butterflies. During my four days' stay at the falls I was 

 so fortunate as to obtain six good specimens. As this 

 beautiful creature flies, the long white tails flicker like 

 streamers, and when settled on the beach it carries them 

 raised upwards, as if to preserve them from injury. It is 

 scarce even here, as I did not see more than a dozen 

 specimens in all, and had to follow many of them up and 

 down the river's bank repeatedly before I succeeded in 

 their capture. When the sun shone hottest about noon, 

 the moist beach of the pool below the upper fall presented 

 a beautiful sight, being dotted with groups of gay butter- 

 flies, — orange, yellow, white, blue, and green, — which on 

 being disturbed rose into the air by hundreds, forming- 

 clouds of variegated colours. 



Such gorges, chasms, and precipices as here abound, I 

 have nowhere seen in the Archipelago. A sloping surface 

 is scarcely anywhere to be found, huge walls and rugged 

 masses of rock terminating all the mountains and inclosing 

 the valleys. In many parts there are vertical or even 

 overhanging precipices five or six hundred feet high, yet 

 completely clothed with a tapestry of vegetation. Ferns, 

 PandanaceaB, shrubs, creepers, and even forest trees, are 

 mingled in an evergreen network, through the interstices 



