LÉPIDOPTÉROLOGIE COMPAREE 375 



pale oclireous, to being almost totally suffused with black. Very 

 many beautiful and curious forms are thus produced, but as their 

 number is infinité, it is useless to describe them. There is but 

 little variation in the lines and bands, except that the subterminal 

 band niay be reduced in breadth. 



Genitalia of imago. PL I, Fig. 29. 



The uncus is much as in both parents, but the tip is more like 

 ihat m liirtana, benig broader and blunter than that of zonarïa. 



The gnathos is squamous and m this resembles zonaria; the 

 surface in histarïa is more pitted than scaled. In shape, it is 

 broader than m zonaria and much more rounded. 



The valves partake of the nature of those in both parents, for 

 the costal edge resembles hirtaria, while the outer margin, owing 

 to the mdentation near the tip, becomes somewhat falcate as in 

 zonaria. 



The costal ridge is broad and raised, but not so much as in 

 zonaria. The oedeagus, relatively, is not so short as that of 

 hirtaria. 



The cornuti on the vesica are very strongly developed into a 

 comb-like band of spines of varying lengths. This band is much 

 stronger that in either of the parents; the band in zonaria is 

 a combination of waits and a few long spines whilst in hirtaria 

 we hâve a band of eight or nine fairly broad double-pointed spines. 



Habits of imago. 



As there are no f emales, as was mentioned before, there is only 

 the maie to consider. The maie émerges as usual, late in the 

 afternoon but, although it usually expands its wings at once, 

 sometimes this may be delayed for some hours. The imago flies 

 and pairs in the usual manner and, when allowed to rest on the 

 bark of a tree, sits just as hirtaria does. If compelled to fall, in 



