PLATE 34 



Fig. 205. Nyearctia leucoptera, $, inner surface of right fore-tibia showing epiphysis ( X 34). 



Fig. 206. N. leucoptera, g, part of comb which borders front edge of epiphysis ( X 135). 



Fig. 207. N. leucoptera, £, spines from central part of epiphysis (x 419). The presence of 



detritus between the spines of the epiphysis lends support to the hypothesis that it 



functions as an antenna-cleaning organ. 

 Fig. 208. Glaucostola flavida, $, part of left tymbal organ showing irregular shape of micro- 



tymbals ( X 109). 

 Fig. 209. G. flavida, <$, left tymbal organ (x 34). 

 Fig. 210. Echeta divisa, $, left tymbal organ ( x 16). 



