Walker's Nervous System. 603 



the scaly bug, and the turtle insect ; names expressive of the 

 insect's appearance and shape. It is, I have understood, 

 of ihe species C. hesperidum ; and, perhaps, has been thought 

 to have been imported with golden apples, that is, oranges, 

 from the Hesperides : it affects, in Europe, the whole foliage 

 of the citron tribe. Whencesoever it may have been derived, 

 it demands, in plant stoves, the gardener's best attention to 

 prevent its increase ; and thereby the injuries which it would 

 effect, if allowed to live, upon the herbage of the plants. 

 Another species of insect, called, by English gardeners, the 

 mealy bug, is equally or even more troublesome upon tro- 

 pical plants cultivated in Europe. This is the species which 

 Dr. Gorman had met with in the Cambridge Botanic Gar- 

 den, and had supposed to be identical with "the wild species 

 of cochineal." (See II. 386.) Upon this subject, the follow- 

 ing note had been made by Mr. Guilding : — "I doubt alto- 

 gether whether the Coccus in the Cambridge garden is the 

 Grana sylvestris of South America, both from the trees to 

 which the insects were attached, and from the tenacity with 

 which they adhered. Many species yield the dye; though 

 they are too small and too little productive to be worthy pro- 

 pagation for commercial purposes. Is it likely that any [of 

 the] Cacti would answer in the open air of England ? " 



Some very minute Ants were exhibited, by Mr. Spence, at 

 the Entomological Society's ninth sitting, on June 2. ; which, 

 he said, had swarmed to so great a degree at Brighton, and 

 some parts of London, that, in several instances which had 

 come to his knowledge, the inhabitants had found no other 

 alternative than entirely quitting their houses. [Ent. Mag,, 

 ii. 312.) [We have quoted this for the sake of identifying 

 them with the very minute species of ant which we had pre- 

 viously mentioned, in p. 269., as occurring in a house at Ken- 

 sington gravel-pits. For " 1833," in that mention, read 

 " 1832." The house was that of Mr. Bayley, bookbinder and 

 bookseller. — J, /).] 



REVIEWS. 



Art. I. Catalogue of Works on Natural History, lately published, 

 with some Notice of those considered the most interesting to British 

 Naturalists. 



Walker, Alexander, Author of " Physiognomy founded on 

 Physiology: " The Nervous System, Anatomical and Phy- 

 siological J in which the Functions of the various Parts of 



