286 



As to the internal classification of the family, we must depart 

 from the customary arrangement. The presence of two anal veins in 

 the secondaries of Aciptilia, Pselnophorus, Adaiua and Oidacmato- 

 phorus definitely groups these four genera, while those remaining are 

 characterized by the presence of only one anal in the secondaries, 

 Agdistis alone excepted. It, however, is at once segregated by its en- 

 tire wings. On this basis Spuler divides the Pterophoridae into three 

 sub-families, the Agdistinae, Platyptiliinae and Pterophorinac. In our 

 opinion these divisions are scarcely necessary to a convenient classi- 

 fication, but they are tenable. The last would become the rather 

 clumsy word Oidacmatophorinac according to our revised nomencla- 

 ture. 



Which of the two higher groups should stand next to Agdistis in 

 a linear series, seems to us largely a matter of personal opinion, for 

 each is more highly developed in some particulars than the other. We 

 prefer to begin with the complete Platyptiliid series, inserting Oidae- 

 matophorus and allied genera before Agdistis because of their posses- 

 sion of two anal veins, as already mentioned. This arrangement results 

 in the least possible deviation from that now in use, since it involves 

 change of position in the cases of Exelastis, Marasmarcha and Stcn- 

 optilia alone. 



The following diagram expresses our views on the phylogeny of 

 the genera : 

 Triclwptilus 



Ptcrophonis Exelastis 



Aciptilia 



Adaina 



