104 A TOUR AMONG THE ISLANDS 



The islet Lula, close to Kisigalla, was visited on the same 

 day, and was found to differ considerably from its neigh- 

 bour. It consists of a small rocky ridge covered by bushes 

 and not by large trees, and is much frequented by crocodiles, 

 whose basking places are numerous. Of birds, a black 

 and white flycatcher, not met with on any other of the 

 five islets off the east end of Kome, was noted to be 

 relatively plentiful. Neither the spiders of Sanga nor 

 the slugs of Kisigalla were found on Lula. Butterflies were 

 interesting (see p. 125) ; Acraeines were more numerous 

 than any other group, forming seven-fifteenths of the total 

 number of species found; A. pentapolis was noteworthy, 

 as it is not found on every isle. The Nymphalines were 

 rather surprising : a huge Euralia, looking very out of 

 place among bushes on a tiny islet, Pseudacraea eurytus 

 form obscura, Ps. lucretia and Salamis made up the total. 

 The only Lycaenid found was a brown, black spotted 

 Pentila, whose Acraeine appearance fitted in well with the 

 prevailing group of the island. 



Colonies of Eupterotid larvae were seen on Lula as on 

 Kisigalla. 



The average catch of Glossina was 9* 1 per boy per hour. 



On February 6th we worked Dwanga Mkuru, the 

 largest of three closely associated islands lying off the 

 eastern point of Kome. This is about three miles long, 

 and very narrow ; generally speaking, its features are 

 of the type associated with a clear, rocky shore. 



The centre is a grass topped ridge sloping steeply on 

 the east down to the rocky or pebbly shore, where at one 

 point a dyke of red, spongy volcanic rock, stuffed with 

 fragments of grey rock as a pudding is stuffed with plums, 

 runs out across the pebbly beach. On the west side is a 

 bold cliff, at the sheltered foot of which is a strip of thick 

 fertile forest, with some huge " Omuvule " (African teak) 

 trees, and an overgrown banana plantation. All along 

 the shore on the east are thick beds of fern and Salvia, 



