TAVU— RESUVU 97 



species, glossy ibis, the open-billed stork, egrets and a 

 stone curlew were seen, while cormorants and darters 

 were numerous in the ambatch trees, on which they nest. 



In the thick jungle, where we very easily lost our sense 

 of direction, the abundance of insect life was shown by 

 bee-eaters, flycatchers, coucals and other insectivorous 

 birds. 



Butterflies were numerous (see table, p. 125), and forest 

 species such as Planema macarista, two species of Charaxes, 

 and a large Euralia were noted. Three species of Tabanidae 

 were noted on the shore, possibly the low lying and marshy 

 ground is suitable for the larvae ; a common Tabanus 

 {T. variatus), a Haematopota and Chrysops brucei were 

 the species seen, the latter quite plentiful, and one was 

 seen in the grip of a predaceous Asilid fly. Termites 

 abounded, and the Dorylus ant was seen, while Culicine 

 mosquitoes bit unpleasantly in the jungle. 



Large Achatina snails were plentiful. 



Olossina was very abundant, the island furnishing 

 ideal conditions of food, shelter and breeding grounds. 

 The average catch per boy hour was 39' 2. 



On January 17th I visited the sand bank south of 

 Tavu, named Resuvu. Its north half is submerged at 

 all times, and there is a dense growth of ambatch on 

 which cormorants and darters nest. The south half, at 

 this time, was above water, and measured about 50 by 

 20 yards, but is probably almost entirely submerged when 

 the lake level is high. Notwithstanding, I found larvae 

 of a very common Noctuid moth ; in the sand a small 

 black ant was found, and I saw a nest of the Belonogaster 

 wasp, which feeds its larvae on caterpillars. 



On January 24:th we moved camp to Nsadzi Island, 

 pausing on the way to examine Kimmi, which we found 

 extremely interesting, since, though quite small and flat, 

 it contains portions of almost every kind of condition met 

 with on the lake shore. We landed first on the south- 



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