444. MODERN CLASSIFICATION OF INSECTS. 
The section MonomERA, comprising those species which possess but 
one joint in the tarsi, terminated by a single unguis ( fig. 118.12. leg of 
C. aceris), is composed of the single family Coccrp*, or scale insects 
( fig. 118. 19. Lecanium Hesperidum ? ), one of the most anomalous 
tribes of insects with which we are acquainted; and which clearly 
proves that annulose animals may exist, which become more and 
more imperfect as they approach the imago state, and which in that 
state lose all trace of articulations in the body, as well as of articu- 
lated limbs (as in the female Cocci and Aspidioti) ; becoming, in fact, 
inert and fixed masses of animal matter, motionless and apparently 
senseless, and which resemble nothing more nearly than the vegetable 

* Brprtiocr. Rerer. To THE Coccip2. 
Anderson. Letters to Sir J. Banks on Cochineal Insects found at Madras, 1773, 
1795. — Ditto, in Asiatic Researches. 
Roxburgh. On Chermes Lacea, in Phil. Trans. vol. ]xxxi. 
Virey. Rech. sur l’Insecte de la Gomme-laque, in Journal de Pharmacie, 1810. 
Kerr. On Gum-lac Insects, in Phil. Trans. 1781, vol. Ixx. 
Breynius. Hist. Nat. Cocci radicum tinctorii, and Corrigenda, &e. to ditto, in Act. 
Erudit. 1731, 1733, and in Phil. Trans. vol. xxxvii. 
Burchard. Enpist. de Cocco Polonico, in Act. Soe. Upsal, 1742. 
Wolff. On the Polish Cochineal, in Phil. Trans. vol. liv. and lvi. 
Haworth. In Trans. Ent. Soe. 1812. 
Truchet. Traite Complet du Kermes, Syo, p. 101. Paris, 1811. 
Dufour. Deser. d'une n. Esp. de Coccus, in Ann, Se. Nat. tom. ii. 
Réaumur. Mémoires, tom. iv. 
Latreille. Deser. K. ¢ de lOrme, in Magas. Encyel. tom. ii. 1796.— Ditto, in 
Hist. d. Fourmis. — Ditto, on Aleyrodes, in Magas. Encyel. 1795. 
De Geer. Mémoires, tom. vi. mém. 8. 
Linneus. Suensk Coccionell., in Sw. Trans. 1759. 
Modeer. Monographia Generis Coccus, in Gothaborg. Vetensk Handl. 1778. 
Dalman. On Swed. Cocci, in Sw. Trans. 1825. . 
Brandt and Hemel, In Mem. Acad. Petersburgh, vol. iii. n. series. 
Fonscolombe, in Ann. Soc. Ent. de France, 1834. 
Bose. Deser. du Dorthesia Characias, Journ. de Physique, tom. xxiv. 
Dorthes. Obsery. on ditto, in ditto, tom. xxvi. 
De Berneaud, in Ann. Soc. Linn. Paris, livr. iv. 1824. (Dorthesia Delavauxii. ) 
Bouché, in his Naturg. d. Insecten, band 1. 
Ratzeburg. On Coccus, in Der Medizinischen Zoologie, Berlin, 1833. 
L. Guilding. On Margarodes, in Linn. Tr. tom. xvi. 
Costa, in Atti Sci. Nat. Napoli (Bull. Ferruss., Sept. 1830), and Fauna del Regno 
di Napoli. 
And the general works of Linneus, Geoffroy, Babricius, Burmeister, Curtis, Bouché, 
Guérin, and Percheron (Genera d. Ins. ), &c. 
