352 EXTERNAL ANATOMY OF INSECTS. 



we consider what has been done by Malpiglii, 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 ascer- 

 tain, 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 structure. 

 Reaumur, and his disciple De Geer, extending their re- 

 searches, have also contributed copiously to our know- 

 ledge in this branch of our science. 



But in this field no one has laboured so inclefatigably 

 and with so much success as the celebrated Lyonnet ; and 

 though his attention was confined to one object — the ca- 

 terpillar 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 in- 

 tellect, that discovered, denuded, and traced every organ, 

 muscle, and fibre of that animal. Much is it to be re- 

 gretted that his proposed works on the pupa and imago 

 of the same insect, which, he informs us, were far ad- 

 vanced 11 , 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 [Pieris Brassicce), before eulogized b ; in which 

 he has done much to supply this desideratum. 



In more modern times, besides Herold, MM. Latreille, 

 Illiger, Marcelle de Serres, Savigny, Ramdohr, Trevi- 



a Lyonnet Traite, &c. Pref. xxii. Want of due encouragement, 

 it is to be feared, caused the abortion of these valuable treatises. 

 The MSS. are, I believe, still in existence. It would probably an- 

 swer now to publish them. 



b See above, p. 52 — . 



