CHAPTER XIII. 



THE SENSES AND SENSORY ORGANS. 



1. SENSATION IN INSECTS. 



THAT insects possess the senses of sight, hearing, smell, taste, 

 and touch is indubitable, and one or more of these senses are 

 usually highly developed in each species, whilst the others 

 play a subordinate part. 



There is an argument which is frequently advanced against 

 this assertion. It is said that as insects appear to be indifferent 

 to pain, they can hardly possess acute sensibility of any kind. 

 That a wasp will frequently continue to feed on its favourite 

 sweets after the abdomen has been cut away, or that a moth 

 pinned to a cork appears to suffer little inconvenience, and a 

 hundred other facts indicating the absence of pain, may be 

 adduced ; and I think there is sufficient evidence that the 

 Arthropoda do not suffer pain, which is quite as conclusive as 



Bibliography : 



192. Mt'ri.LEK, JOHANNES, 'The Physiology of the Senses, Voice, and 



Muscular Motion, with the Mental Faculties.' Translated from the 

 ( lennan by \V. I'.aly. Lond., Svo., 1848. 



193. PAASCH, A., 'Von den Sinnesorganen der Insecten ini Allgemeinen. 

 von Gehbr und Geruchsorganen im Besondern.' Archiv. f. Naturae 

 schichte, Jahrgang xxxix., 1873. 



(This paper was originally written in 1846, but remained in the 

 author's desk until 1873.) 



194. IMIKI i., A.. ' Heitrag x.ur Kenntr.iss der Sinnesempfindungen tier 



Insecten.' Mitt. d. Miinchener Entoin. Vereins, Hd. ii., 1878. 



195. LUIIIJOCK, Sir J., ' Ants, Bees, and Wasps : a Record of Observation-, 

 on the Habits of Social H>menoptera.' The Internal. Science 

 Series. Svo., Lond., Paris, and Berlin, 1882. 



