6 



( 6 ) 



this genus in the imago state, though (Jestrid larvae had 

 long been known and frequently recorded in the intestinal 

 canal of Rhinoceros hicornis, and recently Professor Sjostedt 

 had succeeded in rearing one individual from a larva, described 

 by him under the name meruensis* The only other known 

 specimen from Africa seemed to be that reported from Gallaland 

 by Brauer under the name pavesii. 



Mr. Neave remarked that this seemed to be the first recorded 

 occasion on which the adult insect had actually been observed 

 to be following the rhinoceros, and it was of some interest in 

 this connection that both sexes were represented (2 |^(^, 1 $). 

 The resemblance of these insects to Hymenoptera of the genus 

 Salius, an individual of which, Scdius n. sp. near imperialis, Sm. , 

 he exhibited for comparison, was so marked that, having no 

 net Avith him, he had hesitated to catch the flies by hand, 

 though this was easy to do owing to their sluggish flight and 

 reluctance to leave the carcase. In conclusion J\Ir. Neave 

 put forward the suggestion that the presence of these parasites 

 may be an explanation of the peculiar and well-known habit 

 of the rhinoceros in invariably scattering his dung Avith his 

 horn. It seemed not improbable that the animal did this in 

 an instinctive attempt to kill the larvae by exposing theiu to 

 the sun's rays, 



[xxv 



Danaida chrysippus, Linn. — Dr. G. B. Loxgstaff exhibited 

 a series of 33 specimens of Danalda chrysippus taken by him 

 in Egypt and the Sudan during January and February 1909. 

 Two taken at Cairo, one at Kom Ombo and one at Aswan, were 

 all typical, but somewhat dark. A few other specimens were 

 seen at each of these localities, but none of them had white 

 hind-wings. At Khartum, where the butterfly was fairly 

 common, 25 specimens were taken : of these two might be 

 described as typical, though lighter than the Egyptian speci- 

 mens ; in eight the veins near the middle of the hind-wings 

 were dusted with white scales; in seven the centre of the 

 hind-wings was more or less white, as in Moore's alcippoiihs ; 

 while .seven might be described as typical alcippus, Cram. One 



* "Wissenscliaftliche ergebnisse der scliwedisclien zoologisclicn expedition 

 nach clem Kilimandjaro, dem Mem. Diptera. Oestridae, PJ. I, tig. 1, 2, 

 1958. 



