676 



THE PANORPOID COMPLEX, 111., 



R, . R 



2+3 



Text-Fig.97. 

 Cla nia tenuis Rosen, (fam. Psychidae), imaginal venation, (x7). Let- 

 tering as on p. 535. Note the cross-vein joining Cu2 with 2A in 

 hind wing, and the fusion of Cu2 with 1A in forewing. 



pletely eliminated from the hindwing; while, in the forewing, 

 there is a unique specialisation in the form of a union of Cu 2 

 with 1A, well beyond the anal Y-vein. The frenulum in this 

 family is enormous, and the retinaculum is developed from just 

 below the thickened costa of the forewing, as shown in Text-fig. 

 97. In this same figure it will be seen that there is a cross- vein 

 joining Cu 2 with 1A. If this be really the archaic cu-a, it is an 

 extraordinary thing that it does not occur anywhere else in the 

 Lepidoptera, and not even in other genera of the Psychidae, as 

 far as I know. I have, therefore, decided to treat this formation 

 as a unique specialisation, which will not affect the arehetypic 

 characters of the Order. It looks as if the hindwing had under- 

 gone extreme alteration of shape; and that, during the widening 

 of the anal area. Cu 2 and 1A, probably originally more or less 

 approximated in part, had been drawn away from one another, 



