43^ LÉPIDOPTÉROLOGIE COMPARÉE 



hence the terminal suffusion is reduced similarly. On the whole, 

 the insect is more inclined to hâve a few black scales scattered 

 in the ground, more particularly along the costa, than helenœ. 

 The frmges usually bear no darker spots. The hind wings, 

 although marked just the same as those of the reciprocal hybrid, 

 display the same différences as the forewings, that is, the mar- 

 kings are heavier and the subterminal pale band is narrower. 

 On ail four wings the veins are more clearly outlined in black. 

 The antennas of both are just the same, but the thorax, although 

 approaching pomonaria somewhat in roughness, has sharper pale 

 markings and deader black ones, than helenœ. The abdomen 

 too, is blacker, although, somewhat curiously, the pale yellow 

 rings are much less clearly seen. 



Ventrally, the two insects are the same, but the wings differ 

 on the under side in the same way as on the upper side. 



Wing expanse : 32-36,5 mm. 



IL Females. — Except that the présent insect is blacker and 

 perhaps the hairs a little shorter, the two females are identical. 



Genitalia of the maie. 



The female genitalia (PI. K, Fig. 34), as before, need no dis- 

 cussion. The maie genitalia of langei are very close indeed to 

 those of zonaria. 



There is exactly the same tendency for the tip of the valve 

 to be pointed and indented and none whatever to the rounded 

 appearance of -pomonaria valves. The costal ridge, too, is thick 

 and strongly raised as in zonaria. The gnathos is much narrower 

 and more rounded than in pomonaria, although its surface is 

 more decidedly squamous than in zonaria. The cornuti are quite 

 as well developed as in helenœ and even as in pomonaria ; thus 

 the band of spines shows the greatest divergence of this hybrid 

 form zonaria. The œdeagus is of the zonaria forra. 



