BY R. J. TH.LYARD. 



Ill 



conspicuous in the hindwing than in the fore; this is well seen 

 by comparing Text -figs. 2 and 4. 



The course of 1 A is very tortuous, as may be seen from Text- 

 figs. 3-4. Arising with the other anal veins far from the base of 

 Cu, it bends forward, and approaches Gu 2 just as the latter leaves 

 the cubital fork. It runs alongside this latter vein for some 

 distance, and then bends downwards again away from it, finally 

 running subparallel to and below it to the wing-border. If, 



cu lb Cu la M. 



Text-fig. 3. 

 Hindwing of Eriorraviu semipurpurella Steph. Above, the pupal trachea- 

 tion, ( x60): helmv, tlie imaginal venation, ( x 19). For lettering, see 

 p. 136. 



now, we turn to the imaginal venation, we see that the course of 

 this vein is even more carefully concealed, since a single vein, 

 Cu 2 + 1 A, there occupies the portion where the two trachea? ran 

 alongside one another; in other words, a complete fusion of these 

 two veins has taken place in this region. The part of 1 A descend- 

 ing from Cu 2 distad from this fusion appears like a cross-vein, 

 and has been so considered by some authors. The distal part of 

 1A forms, in the imago, the distal portion of a serial vein, of 



