LÉPIDOPTÉROLOGIE COMPAREE 425 



Dehiscence of pupœ. 



This is just the same as in others of the group except that the 

 female finds considérable difftculty in leaving the pupa. 



Imago. 



I. Male (PI. CLXI, Fig. 1570). — Unless both the pomonaria 

 and the zonana are very closely imbred, no females resuit and, 

 when this occurs, a very large percentage of the maies bred fail to 

 expand their wings or to make any endeavour to do so, possibly 

 because thèse maies represent the females one would expect to be 

 produced, and, like them, hâve no inherited instinct to attempt 

 to climb for the purpose. The insect, as usual, forms in the pupa 

 the year before it émerges. 



When viewed away from zonaria, the insect would be named 

 zonaria at once, especially if one was only acquainted with 

 English spécimens. However, when directly compared with that 

 species, the ground is discovered to be more ochreous tinged, 

 and the lines and suff usions although blacker, are not so strong. 

 There is présent, too, at the base of the wings, and on the area 

 before vein one, a distinct trace of the brighter orange of the 

 ground colour of pomonaria ai thèse points. There are no mark- 

 edly brighter orange scales along the costal groove as in that 

 insect. The scaling, although slightly weaker than in denhami, 

 is not great différent from that of zonaria; thus no attempt is 

 made to reproduce the feebleness of the scaling of pomonaria. 



The transverse lines are very nearly the same as in zonaria, 

 but the first line, instead of being at the best only represented 

 by an irregular clouding, is very definite and is placed just as 

 in pomonaria, although on account of the paler ground, it stands 

 out a little better. The médian line is, generally, as in zonaria, 

 absent, but, when présent, is usually almost midway between the 

 first and second lines, instead of being near the second. There 



