282 _ General Notes. [March 
From these experiments Hauser inferred that those insects de- 
prived of their antennæ were placed in the most f: ble situation, 
such as they would not find in freedom; for the space in which 
the insects moved about was so limited that the males and females 
must of necessity meet. But at the same time the results of the 
experiments cannot absolutely be regarded as proving that the 
males, after the loss of their antennæ, were then not in condition 
to find the females, because in the case of the above-mentioned 
moths, under similar conditions, after the extirpation of the an- 
tennz no sexual union took place. If, however, the experiments 
made do not all lead to the results desired, Hauser thinks that 
the results agree with those of his histological researches, that in 
the greater number of insects the sense of smell has its seat in 
the antennz. His results also agree with those of Perris. 
TI. Histological Researches on the Organs of Smell in Insects — 
The organs of smell consist, in insects,—z.¢., all Orthoptera, Pseu- 
doneuroptera, Diptera, and Hymenoptera, also in most Lepidop- 
tera, Neuroptera, and Coleoptera,— 
I. Of a thick nerve arising from the brain which is sent into 
the antenne. 
2. Of a sensitive apparatus at the end, which consists of staff- 
like cells, which are modified hypodermis cells, with which the 
fibres of the nerves connect. 
3. Of a supporting and accessory apparatus, consisting of pits, 
or peg- or tooth-like projections filled with a serous fluid, and 
which may be regarded as invaginations and outgrowths of the 
epidermis. 
Hauser adds a remark on the distribution of the pits and teeth 
* Hauser here uses the word taster, but this means us or feeler, It is prob- 
sey a pr i aes for teeth ( Xegel). ae 
1870 I obs i these sense-pits in the ant 
papie al eh I ER Y 
