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VI. 0)1 the classification oftJie Geometriua of the European 

 fauna. By EdwaPwD Meyrick, B.A., F.Z.S. 



[Read February 10th, 1892.] 



Plate III. 



The general principles on which this paper is based are 

 the same which I have employed in my paper on the 

 classification of the Pyralidina (Trans. Ent. Soc. Loud., 

 1890, 429), and the introductory remarks which I have 

 made there must be taken to apply here also. 



Those species marked with an asterisk (*) I have not 

 been able to examine critically in respect of structure, 

 though in some instances I have seen specimens of them. 

 I have not thought it necessary to attempt to give a 

 complete catalogue of European described species, but 

 those which I have omitted are either probably of doubt- 

 ful specific value, so far as can be judged from the 

 descriptions, or are so unsatisfactorily characterised 

 that there is no clue to their affinity ; hence only con- 

 fusion would have resulted if I had attempted to place 

 them, and in no instance is the value of any generic 

 name affected. 



GEOMETRINA. 



Ocelli usually obsolete, but sometimes present. Tongue visually 

 well-developed. Maxillary palpi obsolete. Fore wings with vein 1 b 

 usually furcate, but lower fork more or less slender or tending to 

 be obsolete, 5 rising not nearer to 4 than to 6, 7 and 8 out of 9 (7 

 apparentljr but not reallj' separate in Catachjsme), 10 and 11 usually 

 variously anastomosing, 11 from beyond middle of cell. Hind 

 wings with frenulum developed, 1 c obsolete, 5 widely remote from 

 4, sometimes obsolete {Selidosemidcc) , 6 and 7 stalked or approxim- 

 ated at base, 8 connected with or closely approximated to cell near 

 base, thence diverging or anastomosing with or closely approxim- 

 ated to cell to near or beyond middle, or rarely to beyond origin of 

 7, occasionally connected with cell beyond middle. 



The group is closely related to the Notodontidcn ; so 



TRANS. ENT. SOC. LOND. 1892. PART I. (MARCH.) 



