PLATE 33 



Fig. 200. Astralarctia pulverosa, $, aedeagus. 

 Fig. 201. A. pulverosa, <$, genitalia. 



Fig. 202. Nyearctia leucoptera, <$, base of a microtymbal hair-scale (x 1123). 

 Fig. 203. N. leucoptera, £, left tymbal organ ( x 24). 



Fig. 204. N. leucoptera, g, anterolateral view along microtymbals showing proximal part of 

 three hair-scales ( x 349). 



