646 



THE PAXORPOID COMPLEX, 111., 



Text-Fig. 82. 

 Trictena labyrinihica Don., imaginal venation, (x li). Note the loss 

 of the fork of Mi— 2 in hindwing. Lettering as on p. 535. 



of the veins M 5 and M 4) which very soon begin to appear as 

 pale bands with the rest of the imaginal venation. A very im- 

 portant character, viz. the partial fusion of 1A with C112 in 

 the hindwing, is as clearly shown in this genus as in Charagia. 

 But, in the first pupa which I dissected, and which I figured in a 

 previous paper (27, Text-fig. 14), this fusion was not present. An 

 examination of the photomicrographs which I took of this pupal 

 wing shows me quite clearly that this was due to displacement 

 while lifting the wing and spreading it out on the slide; for the 

 pale bands which indicate the imaginal venation can be seen 

 fused together between the two tracheae, which are clearly pulled 

 slightly out of their correct positions. Three other pupae since 

 dissected all agree in having this fusion clearly marked. 



