EXTERNAL ANATOMY OF INSECTS. 351 
we consider what has been done by Malpighi, Leeuwen- 
hoeck, and especially Swammerdam, we admire the pa- 
tience, assiduity, and love of science, that enabled them 
in spite of what seemed insurmountable obstacles, to as- 
certain, the first with respect to the silk-worm, and the 
latter in numerous instances, the internal organization of 
these minute creatures, as well as their external struc- 
ture. Reaumur, and his disciple De Geer, extending 
their researches, have also contributed copiously to our 
knowledge in this branch of our science. 
But in this field no one has laboured so indefatigably 
and with so much success as the celebrated Lyonet; 
and though his attention was confined to one object— 
the caterpillar of the goat-moth (Cossus ligniperda F.), 
—every one who studies his immortal work must admire 
the patient and skilful hand, the lyncean eye, and keen 
intellect, that discovered, denuded, and traced every or- 
gan, muscle, and fibre of that animal. Much is it to be 
regretted that his proposed works on the pupa and imago 
of the same insect, which, he informs us, were far ad- 
vanced ?, were never finished and given to the world. 
Our regret, however, is in some degree diminished by 
the elaborate work of M. Herold on the butterfly of the 
cabbage (Pontta Brassice), before eulogized »; in which 
he has done much to supply this desideratum. 
In more modern times, besides Herold, MM. Latreille, 
Illizer, Marcel de Serres, Savigny, Ramdohr, Trevi- 
* Lyonet Traité, &c. Pref. xxii. Want of due encouragement, 
it is to be feared, caused, at the time, the abortion of these valuable 
treatises. But the MSS. are still in existence, and are, I understand, 
to be published. 
» See above, p. 52—. 
