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PROCEEDINGS OF THE ACADEMY OF 



[Apr., 



Discussion. 



In regard to the location of the olfactory organs in insects several 

 views have been held. Lehmann (1799) tries to analogize the 

 spiracles of insects with the noses of vertebrates. Comparetti 

 (1800) places the seat of smell in different parts for different families 

 as follows: The club of the antennae in lamellicorn beetles, the 

 proboscis in Lepidoptera and certain frontal cells in Orthoptera. 

 Ramdohr (1811) mistakes the salivary glands in the head for the 

 olfactory apparatus. Rosenthal (1811) regards a folded skin beneath 

 the antennae as the seat of the olfactory organs. Huber (1814) 

 considers the mouth cavity of the honey bee as the seat of olfaction. 

 Treviranus (1816) thinks that the oesophagus is the seat of the 

 olfactory apparatus. Kirby and Spence (1826) regard the rhinarium 

 or nostril-piece as the seat of the organs of smell. Burmeister 

 (1836) considers that insects smell with what he calls the "internal 

 superior surface." Paasch (1873) claims that a plate between the 

 eyes and beneath the antenna? is the seat of the olfactory organs. 

 Wolff (1875) calls the hairlike organs on the epipharynx of the honey 

 bee the olfactory apparatus. Joseph (1877) claims to have found 

 an olfactory region near the spiracles which communicates with the 

 tracheae. 



After having cut off the antennae of two male moths, Duges (1838) 

 says that the insects were unable to find a female that they had 

 previously been able to locate while their antennae were intact. 



