Notwithstanding the general accuracy with which Fabricius has related the local circumstances connected with the history of the insects which he describes, there are occasionally errors in this respect it must be satisfactory to many of our readers to have corrected: errors, which, owing to the lapse of time and death of those distinguished Naturalists which Fabricius had the happiness of meeting with in England, we may venture to presume, without vanity, can be now corrected only through the medium of our assistance. The celebrity of Fabricius throughout Europe as one of the best informed Entomologists of the last century, renders it even of no small importance to correct the most trivial oversights he has committed; and this consideration will, we trust, afford us some apology for that minuteness, if not prolixity with which it may be requisite occasionally to relate particulars of a local nature, in order to correct such errors. An instance of this kind occurs in the note annexed to the Fabrician description of the Papilio now before us; in stating the local circumstances connected with its history, Fabricius says _Habitat in America_. _Dom Latham._ There is obviously an oversight in this passage, for we well know that the Fabrician description of this species was taken from the figure in the series of drawings painted by Mr. Jones, which has been already mentioned; the original of the figure now presented by us to the attention of our readers; and that the specimen of the insect itself from which that painting was taken was preserved at the time Fabricius described it in the celebrated collection of the late Mr. Dru Drury. As we had the pleasure of Mr. Drury’s acquaintance, as well as that of Mr. Jones, and had an unreserved access to the information and cabinets of both, we are enabled to speak upon this circumstance with confidence. The example of Papilio Homerus in the cabinet of Mr. Drury was perfectly familiar to us, it was ourselves who wrote the name _Homerus_, annexed to this insect in that cabinet; and so far as our recollection serves at the distant period of five and twenty years, Mr. Drury stated to us that he had received this individual specimen from the Island of Jamaica. We are in possession of the Entomological manuscripts of this venerable author, but among those we have in vain sought for any positive confirmation of this distant recollection. It appears certain that Mr. Drury had not entered it under the name of _Homerus_ in his catalogue after we had communicated that name to him; and which we did upon the authority of the Fabrician manuscripts annexed to the drawings of Mr. Jones. At the time Mr. Drury received this insect from his correspondent it was assuredly a nameless species, and was probably entered as such, with a number only; such omissions in the nomenclature being, of course, usual when the species proved to be undescribed, till proper names could be assigned to them.