INSECTA. 343 



a) Antennae longer than body. Ocelli three, disposed in a tri- 

 angle, Macrocera MEIG. 



b) Antennae shorter than body. Ocelli three, placed in a trans- 

 verse line. Bolitophila HOFFMANNSEGG, MEIG. 



On the metamorphosis, comp. GUERIN, Memoire sur un Insecte du genre 

 Bolithophile, Ann. des Sc. not. x. 1827, pp. 399 411. PI. xvm. 



Chionea DALM. Antennae setaceous, with ten joints. Palps 

 with four sub-equal joints. Ocelli none. Body apterous, with 

 poisers. 



Sp. Chion. araneoldes, DALMAN Kongl. VentensTc. Acad. Handb. 1816, 102 ; 

 OKEN'S Isis, 1824, p. 419, Tab. v. ; GUERIN Iconogr., Ins. PL 93, fig. 2 ; 

 found in Sweden on the snow. 



Anisomera HOFFMANNSEGG, MEIG. (Hexatoma ~LA.TR.,Nematocera 

 MEIG.) Antennae very long, setaceous, with first joint cylindrical, 

 second short, cup-shaped, third elongate, filiform. Palps with four 

 equal joints. Wings incumbent. 



Megistocera WlEDEM. 

 Dixa MEIG. 

 Macropeza MEIG. 

 Trichocera MEIG. 

 Polymera WIEDEM. 



Limnobia MEIG. Antennae setiform, joints 15 17; first joint 

 cylindrical, second cup-shaped, rest oblong or globose. Palps with 

 four equal joints. Ocelli none. Wings incumbent, parallel, with 

 nervures naked or pilose (Erioptera MEIG.) 



Add sub-genera : Symplecta MEIG., Cylindrotoma MACQ. (antennae 

 with thirteen cylindrical joints), Limnophila MACQ., Idioptera 

 MACQ., Rhamphidia MEIG., MACQ. 



Sp. Limnobia picta, Tipula picta FABR., SCHELLENBEBG Tab. 38, fig. i ; 

 GUERIN Iconogr., Ins. PI. 92, fig. 9 (named Limnobia ocellaris), &c. Comp. 

 T. E. SCHUMMEL, Beschreibung der in Schlesien einheimischen Arten von 

 Limnobia, Beitragezur Entomologie I. Breslau, 1829, 8vo, s. 97 201. Tab. 

 i 5 ; B. STANNIUS zur Verwandlungsgesch. der Limn. Xanthoptera, ibid. s. 

 202 206. 



Rhipidia MEIG. 

 Ozodicera MACQ. 



