Ue. CLASS VIII. 
joint forming a produced, lanceolate branch, almost equal in length 
to the three last joints). 
Sp. Stylops melitte, &e. Icones: WESTWwooD, Introduct. Frontisp. Vol. 1. fig. 6; 
Stylops Spencit, GuER. Iconogr., Ins. Pl. 92, fig. 1, Styl. Dalii, Lmacu, 
Zool. Mise. 111. Tab. 149, Styl. Kirbii. 
** Tarsi with three or with two joints. 
Halictophagus Curtis. Tarsi with three joints. Antenne with 
seven joints, supplied externally with lamelle disposed pectinately. 
Elenchus Curtis. Tarsi with two joints. Antenne bipartite, 
with stem simple, biarticulate, and upper branch _ biarticulate, 
elongate, slender. 
Comp. Curtis, British Entomology quoted by Wxstwoop, Jntro- 
duction 1. pp. 287, &e. 
OrveR VI. Diptera. 
Hexapod Insects with two wings, and two poisers. Mouth 
suctorial, with labium not palpigerous produced into a proboscis, or 
a sheath, which receives and incloses in a groove above an haus- 
tellum formed of sete, various in number. ‘Two palps (maxillary) 
at the base of the proboscis. Metamorphosis complete. 
Two-winged. Diptera L., Antliata Fasr. The principal works 
on this order are the following :— 
J. C. ScHELLENBERG, Glattungen der Pliegen, in 42 Kupfertafeln 
entworfen. Zurich, 1803. 8vo (with german and french text). 
J. C. Fasricti, Systema Antliatorum. Brunsvige, 1805. 8vo. 
J. W. Metcen, Systematische Beschreibung der bekannten Huro- 
piischen zweiflugeligen Insekten. Mit Kupfertafeln. vir. Theile, 8vo. 
Aachen und Hamm, 1818—1838. 
C. R. W. Wiepemann, Ausserewropdische zweifliigelige Insekten. 
Mit Steintafeln. u. Theile, 8vo. Hamm, 1828, 1830. 
Histoire naturelle des Insectes Diptéres par Macquart, av. pi. 
11. Tomes, 8vo. Paris, 1834, 1835. (The work of Fauien, Diptera 
Suecie, Lund. 1814—1827, 2 vol., I have not been able to inspect.) 
The general covering is, on the whole, very thin. The body 
consists, as in the other hexapod Insects, of three principal parts : 
