308 CLASS VIII. 



joint forming a produced, lanceolate branch, almost equal in length 

 to the three last joints). 



Sp. Stylops melittce, &c. Icones : WESTWOOD, Introduct. Frontisp. Vol. i. fig. 6; 

 Stylops Spencii, GUEB. Iconogr., Ins. PI. 9-2, fig. i, Styl. Dalii, LEACH, 

 Zool. Misc. m. Tab. 149, Styl. Kirbii. 



* * Tarsi with three or with two joints. 



Halictophagus CURTIS. Tarsi with three joints. Antennas with 

 seven joints, supplied externally with lamellae disposed pectinately. 



Elenchus CURTIS. Tarsi with two joints. Antennas bipartite, 

 with stem simple, biarticulate, and upper branch biarticulate, 

 elongate, slender. 



Comp. CURTIS, British Entomology quoted by WESTWOOD, Intro- 

 duction ii. pp. 287, &c. 



ORDER VI. Diptera. 



Hexapod Insects with two wings, and two poisers. Monti 

 suctorial, with labium not palpigerous produced into a proboscis, o 

 a sheath, which receives and incloses in a groove above an haus 

 tellum formed of setae, various in number. Two palps (maxillary 

 at the base of the proboscis. Metamorphosis complete. 



Two-winged. Diptera L., Antliata FABE. The principal work 

 on this order are the following : 



J. C. SCHELLENBERG, Gattungen der Fliegen, in 42 Kupfertafelr 

 entworfen. Zurich, 1803. 8vo (with german and french text). 



J. C. FABRICII, Sy sterna Antliatorum. Brunsvigse, 1805. 8vo. 



J. W. MEIGEN, Systematische Beschreibung der bekannten Euro 

 paischen zweifiugeligen Insekten. Mit Kupfertafeln. vn. Theile, 8vo 

 Aachen und Hamm, 18181838. 



C. R. W. WIEDEMANN, Aussereuropdische zweifliigelige InseJctm 

 Mit Steintafeln. n. Theile, 8vo. Hamm, 1828, 1830. 



Histoire naturelle des Insectes Dipteres par MACQUART, av. pt 

 ii. Tomes, 8vo. Paris, 1834, 1835. (The work of FALLEN, Dipten 

 Suecice, Lund. 1814 1827, 2 vol., I have not been able to inspect. 



The general covering is, on the whole, very thin. The bod; 

 consists, as in the other hexapod Insects, of three principal parts 



