172 Dr. A. JefTeris Turner's Observations on 



that I have examined. It will be noted that the cell of 

 Tortrix really represents a compound structure, the com- 

 bined areole and cell, and I propose to call it an areocd. 

 Mr. Meyrick in his " British Lepidoptera " has noted 



Fig. 26. — Isotrias hybridana, Hb. 



and figured the occasional occurrence of chorda and media 

 in the Tortricidae. He declares them to be inconstant 

 and valueless in defining the genera. This may be so, 

 but they are exceedingly valuable in indicating the true 

 relationship of the family. 



Tineidae. — In this great family 

 asthenogenesis among the Lepido- 

 ptera runs to its extreme. In many 

 of the more minute forms the 

 neuration is so degraded as not to 

 be recognisable as of the lepido- 

 pterous type, were it not that they 

 are linked to the more typical 

 forms by intermediate gradations. 

 These aberrant forms need not 

 concern us in this essay, for they 

 are certainly derivative, and the 

 affinities of a family are entirely 

 determined by those of its most 

 primitive genera. The genus Nemophora, with its five- 

 jointed maxillary palpi and long antennae is certainly 

 a primitive type, and in spite of its small size preserves a 

 primitive neuration. In the fore-wing both sector and 

 media are present, while the hind-wing has a branched 



Fig. _7.- ZV< mophora swam 



ni> nl-ii.;- //'/. Linn, 



