NOTICE OF ENTOMOLOGICAL WORKS. 109 



The Libellulidce have their labial palpi very much developed ; 

 the maxillary are almost obsolete. 2. " Physiological Consi- 

 derations on the Development of Instinct in Invertebrata, by 

 M. Fray," — Insects are placed by this writer in a much higher 

 rank among beings than they are generally considered to 

 occupy ; and he allows them to possess the faculty of thinking. 



3. " On the Habits of the Papilionida of French Guiana, 

 by M. Th. Lacordaire." — In this interesting paper are de- 

 scribed the various flights of those charming creatures : the 

 Morphos soaring majestically above the summits of the loftiest 

 trees ; other Morphos, flying by irregular and rapid bounds of 

 eight or ten paces each ; the immense Pavonite, half-nocturnal, 

 flapping their wings heavily during their short flight, &c. &c. 



4. " Memoire sur une Nouvelle Classification des Araneides, 

 par M. le Baron de Walckenaer." — His works on this tribe 

 are well known ; and to him alone are we indebted for almost 

 all we know of their systematic arrangement. His systematic 

 table is excellent : the genera are placed in the middle ; on the 

 one side, he divides them according to their external structure ; 

 on the other, according to their natural habits. 



8. Revue Entomologiqiie,2wbliee par Gustave Silbermann. 

 Strasbourg. Tome /., Livraisons 1 — 5. 



9. Magasin de Zoologie ; par F, E. Guerin. — The principal 

 essays published in this work since we last noticed it, are : — 

 1. " On the Exterior Organization of Phyllosoma, with a 

 Monograph of that Genus, by F. E. Guerin." — This is an 

 elegant genus of Crustacea, found in all the tropical seas ; 

 the species are transparent like glass; and when swimming 

 can only be distinguished by their beautiful blue eyes. 2. " A 

 Monograph on the Genus Rajjfiic/ia, with Figures of the 

 Larva and Pupa, by M. Percheron." — In their metamorphose 

 they resemble the Coleoptera ; and the pupa is quiescent, not 

 active, as it has been generally supposed to be. 



10. Iconographie du Regne Animal de M. le B"". Cuvier ; 

 par M. F. E. Guer'm. Livraisons 31 — SS. — These contain 

 seven entomological plates ; five of Coleoptera, and two of 

 Hymenoptera. 



