HETEROPTERA. 451 
Body depressed. 
Antenne generally elongated, filiform. 
Mouth arising from the anterior and inferior part of the head; 
promuscidate. 
Pupa active, semicomplete @Mucamonpioscs semicomplete Fab.). 
Having, in the general observations upon the Homoptera, entered 
into the question of the rank of that and the present group, I shall 
here merely notice the peculiarities of structure exhibited by these 

Wolff. cones Cimicum. Erlang. 1801-4. 4to. pl. 20. 
Fabricius. Systema Rhyngotorum, 8vo. Bruns. 1801. Ed. Alt. 1803. 
Fallen. Monogr, Cimicum Sueciw, in Vetensk. Acad. Handl. 1805-7. and 
Copenh, 1807. Specimen Novum Hemipt. dispon. Méthod. exhib. Lund. 
4to. 1814, — Ditto, 1823, Supplement to ditto, 8vo. Lund. 1826. — Ditto, 
Hemipt. Sueciew, Lund. 1826, 8vo. — Ditto, ditto, 1829, fase. 1—10. 
LL. Dufour, Recherches Anat. et Physiol. sur les Hémipt. Paris, 4to. (Extr. from 
Mém. Sav. Etrang. tom. iv.) 1833.— Ditto, in Annal. Soc. Ent. France, 
tom. ii. and tom. iii. — Ditto, in Ann. Sci. Nat. April, 1831, 
Laporte. Essai d’une Classification Systémat. de l’Ordre des Hémipt., in Guérin’s 
Mag. Zool. 1833. 
Schellenberg. Die Land und Wasserwanzen. Zurich, 8vo. 1800. 
H. Schiffer. Nomenclator Entomologicus, 12mo, Regensburg, 1835. 
Hahn. Scones ad Monographiam Cimicum, fase. i. 12mo. Nurimb. 1825.—Ditto, 
die Wanzenartigen Insecten, in Nos. 1831-9. (continued by H. Schiffer). 
Sm. 8vo. 
Say. Hemipt. of Rocky Mountains, in Journ. Acad. Philadelph. tom. iv. — 
Ditto, Deseript. of new Heteropt. Hemipt. of N. Amer. 8vo. 1831. New 
Harmony. 
Thunberg. Dissert. de Hemipt. rostratis Capensibus, 4to. Upsal, 1822. (in 4 parts). 
— Ditto, Ins. Hem. tria g. illustr. Upsal, 1825. 
Schilling, in Beitrage zur Entomol. (Hemipt. Silesia). 
Gistl, in Faunus, 1837,No. 2. (list of species). 
Burmeister. andl. d. Ent. vol. ii. — Ditto, in Nov. Act. Phys. Nat. Curios. 
vol. xvi. — Ditto, in Revue Entomol. de Silbermann, tom. ii. 
Waltl. Reise nach Spanien. 
Westwood, in Ann. Soc. Ent. de France, tom. iii. 1834. — Ditto, in Trans. Ent. 
Soe. vol. ii. — Ditto, in Mag. Nat. Hist. n.s. vol. ii. 
Eversmann, in Bull. Mose. 1837. 
Spinola. Essai sur les Hémiptéres, 8vo. Geénes, 1837. — Ditto, in Bull. Soe. 
Cuvierr. Nov. 1839 (2 n. g.). 
Audouin and Brullé. Hist, Nat. Ins. tom. ix. 
And the general works of Klug (Symb. Physice), G?iffith Ce K.), Serville 
(Eneycl. Méth.), Perty (Delect. An. art. Braz.) Palisot-Beauvois, Donovan, 
Drury, Coquebert, Curtis, Zetterstedt, Guérin, Boisduval, §c. 
CGee 
