LÉPIDOPTÉROLOGIE COMPARÉE 445 



to a change in the ground colour, for the characters of the mar- 

 kings and suffusions are fairly constant. 



Habits of the larvae. 



The larvap, as seems to be the case in ail hybrids in which 

 zonaria takes a part, behave just as larvas of that species do. 

 When slightly alarmed, they bring their head and claspers toge- 

 ther and fall, but they soon uncurl and ascend the nearest plant. 

 I found them to feed well but, in spite of that, they are extremely 

 tedious to rear for they take fully as long as larvae of Scotch 

 lapponaria to feed up. They are usually the last of ail the hybrid 

 larvas to pupate. 



During the day time and at night af ter they hâve fed. they seem 

 to leave the food plant and rest elsewhere. 



Pupae, etc. 



The pupae are exactly the same as those of hybrid nierana in 

 shape and appearance, but they are somewhat larger in both 

 sexes. Unlike those of that form, they do lie over, for I hâve 

 had some for three years and they are still alive. When the 

 imago intends to come out the following year, it forms very 

 early, gênerai ly from six weeks to eight weeks before those of 

 other hybrids. 



Imago. 



I. MALE (PI. CLXI, Fig. 1569). — The maie shows the samc 

 inclination as that of helenœ to fail to expanse its wings. The 

 insect very closely resembles merana in markings on the forewings 

 in most characteristics except colour, and this différence is brought 

 about by the great weakness of the scaling, v^hich lessens the 

 clearness of the white ground and causes the black markings to 

 appear very grey and washed out in appearance. If there is a 

 slight différence in the markings, it is that the second line is 



