RY E. MEYEICK, B.A. 413 



particular difficulty in applying these means, and they have 

 enabled me to separate the species into genera which appear to 

 be undoubtedly natural. I should add that in the Tortricina the 

 neuration can usually be clearly traced by inspection of the lower 

 surface of the wings without denuding them of scales ; a 

 circumstance which has enabled mo to fix with certainty the 

 position of those species of which I possess only single specimens 

 which could not therefore be spared for dissection. For the just 

 classification of the present family (Tortricidcc) I have been 

 compelled to form seventeen new genera, owing to the very strong 

 specialisation of the fauna, many of these forms being very 

 remote from anything previously known. 



The Tortricina appear to me clearly separable into three well- 

 defined families, by the following characters, viz : 



1 . Tortricidce. — Lower median vein of hindwings not pectinated 

 at base ; vein 2 of forewings rising from before posterior third 

 of cell. 



2. GraphoMthidce. — Lower median vein of hindwings pectinated 

 at base ; vein 2 of forewings rising from before posterior third 

 of cell. 



3. Conchylidce. — Lower median vein of hindwings not pectinated 

 at base ; vein 2 of forewings rising from posterior fourth of cell. 



These families constitute assemblages of an undoubtedly 

 natural character, and are capable of accurate limitation as above ; 

 but even were one or two exceptions to be discovered, I should 

 not consider that the fact would invalidate the title of these groups 

 to be regarded as families. In my view, these three families are 

 independent branches of a common stock, and might be repre- 

 sented by three lines, diverging somewhat, from nearly the same 

 point ; and being distinctly separable at their origin, they need 

 not be confused, even though one should, through analogous 

 variation, perhaps occasionally develope the peculiar characteristic 

 of the others. The true position will always be discernible by a 



