ERRATA AND ADDENDA TO VOL. I. 



Page 1. line 8. for "and antenna; " read "and two antennae." 



line 11. after " Aristotle " read "and the class of insects of Lamarck." 

 3. line 5. for "mites" read "lice." 



In reference to the observations in sect. 1. relative to the importance of 

 metamorphosis as the leading character of the Ptilota, Mr. MacLcay, 

 in consequence of the observations of Mr. J. V. Thompson, and the 

 confirmation assumed to have been afforded to them by the recent 

 researches of Captain Ducane (^Annals Nat. Hist. No. 9. Nov. 1S3S.) 

 has suggested the theory, that " the Ptilota may be characterised by 

 their change of form taking place during their last two or three stages 

 of ecdysis ; while the metamorphosis of all other annulosa only occurs 

 during the first or second moult after leaving the egg." {Illustr. Zoo/. 

 So. Africa, No. 3. p. 53.) In opposition to this theory, I will only 

 here reply that the most elaborate examinations hitherto made of the 

 eggs of spiders and Crustacea by Heroldt and Rathke, together with 

 my own of the egg of one of West Indian Land Crabs, have clearly 

 demonstrated that, at least in the species under examination, not the 

 slightest change worthy of the name of metamorphosis takes place. 

 II. line 16. for "in insects" read "in those insects." 



line IS. for "being" read "are." 



line 20. dele. 



line 30. for "are as destitute" read " which are as destitute." 



16. line 3. for " oxyginating " read "oxygenating." 



17. line 10. 29. for " Homomorphous " read " Monomorphous." 

 line 19. for "larvae" read "larva." 



21. line 21. dele "and" before Dermaptera. 



32. line 44. for " Harris in ditto ? " read " Harris in Nat. Hist. Soc. Hartford, 

 vol. i." 



37. line 37. Mr. Haliday states in the Zoolocfical Journal, that Clambus pos- 

 sesses five joints in the tarsi. 



42. line 40. for " Philyhdrida " read " Philliydrida. " 



83. line 1 4. Mr. Newman assures me that Eutoma tinctilatus possess a max- 

 illary unguis, which escaped my microscopical examination of it. 

 If this be the case, it cannot enter into the genus Carenum, in 

 wliich Latreille noticed the want of a maxillary hook. (/?. An. 

 second edition, tom. iv. p. 381.) 



89. line 30. for "Chychrus" read " Cychrus," 



93. The elaborate volume of descriptions of Dyticidaj and Gyrinida; 



recently published by M. Aube, must be particularly noticed. 

 IIS. line 9. for "to be the" read "to be those of the." 

 123. note*, line 2. for "species" read " spaces. " 



126. note f, M. Audouin has published a note upon this subject in the Hist. 

 Nat. Ins. tom. v. p. 268. 



