PROCEEDINGS 



OF THE 



SOUTH AFRICAN PHILOSOPHICAL SOCIETY. 



ANNUAL ADDEESS TO THE MEMBEES 



OF THE 



SOUTH AFEICAN PHILOSOPHICAL SOCIETY, 



On July 31, 1901. 



By the Peesident, L. PEEINGUEY, F.E.S., F.Z.S., etc. 



Some Phases of Insect Life in South Afeica. 



11. — Phonation in Insects. 



In my previous address I took as my subject the Protective 

 Colouration in South African insects. In the present one I shall 

 deal with the PJionation, or sound " produced by some of the South 

 African insects. 



From Colour to Music, of a kind, the transition is not so abrupt 

 as it might at first seem, were it proved that the artistic emotions of 

 an insect could be measured by our standard, or possibly the standard 

 of some other vertebrate animals. 



But although we may not be able to pronounce a final opinion as 

 to the resulting value of sounds in insects, sound-producing appa- 

 ratuses are present in many, and especially among the Orthopterous 

 ones (grasshoppers, &c., &c.), which offer the best instances of a 

 highly protective resemblance to inanimate surroundings. 



* I do not allude here to the sound produced by the mere vibration of the 

 wings of bees or flies on the wing. 



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