BY A. J. TURNKR. 635 



developed. Forewiiigs with 3 and 4 separate, 5 widely separate 

 from 6, 6 separate but closely approximate, or connate, 11 free, 

 or anastomosing with 12, or with 12 and 10. Hindwings with 3 

 and 4 separate, 6 and 7 separate, 8 approximated to cell to ^ or 

 to about middle, diverging gradually or rather abruptly; disco- 

 cellulars angled on vein 5 or nearly straight, slightlj' or moder- 

 ately oblique, dorsal curved or nearly straight. 



Type, Terpna hcemaiaria H.-Sch., Ausser. Schmett., f 205, 206. 

 A large genus; vein 8 of the hindwings varies in the length of 

 its approximation to the cell and in the abruptness of its iliver- 

 gence, but the extremes seem to be connected by intermediates. 

 In the palpi there are also considerable variations, but I have not 

 seen my way to divide the genus on this ground, though on a wide 

 survey of the whole group this might be possible. The species 

 are coloured to imitate the bark of trees, being speckled, mottled, 

 and often variable; they are difficult to distinguish by descrip- 

 tion. The undersides, which are much more constant, are valuable 

 for identification. 



This genus must not be identified with Pseudoterpna Hb., of 

 which the type is pruinnta Hufn. In that species thei'e is a 

 well marked basal costal expansion of the hind wing, and the 

 frenulum, though fairly strong in the ^, is obsolete in the <^. 



1. Forewings with antemedian lineforming two strong 



rounded projections 111. cinerea. 



Antemedian line of forewings without rounded 

 projections 2. 



2. Diseal spot of forewings above linear 3. 



Discal spot of forewings above, when developed, 



not linear... 9. 



3. Hindwings beneath briglit orange towards base. .. 104. emiliaria. 

 Hindwings not orange beneath 4. 



4. Forewings beneath tinged with reddish 5. 



Forewings beneath not tinged with reddish 6. 



5. Wings above green-whitish with fuscous lines 106. myriosticta. 



Wings above brown-whitish with reddish-brown 



lines 101. paroptila. 



*. Wings above green 105. muscosaria. 



Wings above whitish or grey 7. 



