them to be placed in the same organ. Thus, 

 Bonsdorf relates that all his observations agreed 

 in one circumstance, viz. that the antennae which 

 were folded up in most insects, became erect as 

 soon as they were put on the alert by means of 

 loud sounds, while they disregarded low ones. 

 He observed, in a morning walk undertaken for 

 the purpose of catching insects on the hazels, 

 while standing in the shade, a nut-weevil sitting 

 quietly at a distance on a leaf, with its antennae 

 hanging down as if asleep ; he directed a pocket 

 telescope to the spot, which was about five feet 

 distant, and therefore convenient for viewing the 

 insect. " The point of view being thus deter- 

 mined," says he, " I made a loud sound, and was 

 delighted with the opportunity of seeing the wee- 

 vil not only roused, but its antenna which hung 

 down, become elongated, and being full of points 

 struck by the undulations of sound, they extend- 

 ed themselves arid remained on the alert, till 

 alarmed again by a fresh sound, the insect fell to 

 the ground, as is the habit of it and other wee- 

 vils."* But it is to be remarked here, that the im- 

 pression of the sound having been communicated 

 to the insect, the motion of the antennae might 

 have followed as an attempt, on its part, to as- 

 certain the proximity or the remoteness of the 

 danger by which it supposed itself threatened ; 

 arid thus the deductions drawn by Professor 

 Bonsdorf, from the antennae being put on the 

 alert by the influence of sound, are not at all sa- 



* Field Naturalist, July 1833. 



