BY E. MEmiCK, B A. 149 



in my previous papers, and to add descriptions of the new species 

 which have in the meantime come into my possession. I have 

 also rearranged on a proper system of classification the species of 

 Cramhidcc, FhycidtCy and allied families, which were classified at 

 first without due appreciation of the value of the neuration as a 

 guiding character ; in my later papers I have considered it of 

 primary importance. 



The investigation of the venation of the Cramhidce has revealed 

 results of unexpected interest, such as would of themselves go 

 far to confirm the importance which I attach to this subject. 

 The venation of the extra-European genera does not seem to 

 have been at all studied, and the genera are often distinguished 

 by Zeller only on the most trifling and superficial characters ; 

 yet, so far as my material enables me to judge, they possess in 

 the venation sharply-defined marks of distinction. Thus Argyria 

 differs from Cramius in having veins 10 and 11 of the forewings 

 stalked ; Prioiiopteryx in having only 9 veins in the forewings 

 and 7 in the hindwings ; Diptychopliora in having vein 1 1 of 

 forewings running into 12 before costa ; and so on. In 

 JDiptychophora I have examined nine of the thirteen known 

 species, and found the venation constant. But the most interest- 

 ing discovery has been the fact that almost the whole of the 

 Australian species referred to Gramhus have veins 8 and 9 of the 

 forewings on a separate stalk, not rising out of 7, and therefore 

 belong to the genus separated by Heinemann as Thinasotia Hb., 

 represented in Europe by three or four species only, and not ^^et 

 recognised elsewhere, except one species in New Zealand. In 

 my opinion this conclusively proves the distinctness of the genus, 

 which was previously doubtful. Consequent upon this is the 

 remarkable fact that the true genus Cramhus is virtually absent 

 from the native Australian fauna, though universally present 

 elsewhere, and numerously represented in New Zealand ; I say 

 virtually, for of the two Australian species one, C. hapaliscuSy 

 appears to have its home in Africa, and to have found its way 



