LEPIDOPTÉROLOGIE COMPARÉE 429 



the October of the same year as they pupated ; one came out in 

 January and the rest appeared with the maies in the third week 

 in February. Thus, it will be seen that once more the insects 

 émerge before those of the parent species. They follow the usual 

 piractice of the genus and émerge late in the day. As was men- 

 tioned before, a very large percentage of the maies fail to expand 

 their wings. Whcn dusk approaches, they fly strongly and pair 

 readily with either parent and, with difficulty, with other forms. 

 The resiilt is just the same as in the case of denhami; there is 

 almost total sterility; in fact, except that I once got an ovum of 

 harrisoni cf x hirtaria Q to hatch I hâve never obtained fertile 

 ova when zonaria was one of the parents of the hybrid. In my 

 expérimental cage the maie spécimens rest on the tree trunk just 

 as pomonaria does. When an attempt is made to capture them, 

 they close their wings over the back; the forewings are then 

 thrown far forward as if to protect the head and the body is 

 curved sharply under. With a quick kind of spinning motion they 

 then fall down to the ground, and feign death for a long period. 

 Sometimes, instead of falling immediately after the above actions, 

 the insect throws the left leg sharply forward and grips the bark 

 with the claws and remains suspended. The females behave in 

 a similar manner; they arch their backs and almost form a bail 

 with their bodies before falling. I think that, exactly like zonaria^ 

 they are attempting to mimic the Pill Millipede {Glomerïs mar- 

 ginatd) which is so plentiful where that insect is to be found. 

 Their habits, in ail respects, are the same as those of zonaria 

 females. 



The ova. 



The ova are laid with great difficulty and it is only in excep- 

 tional cases that more than two or three are laid before an 

 attempt is made to attract another maie. As in harrisoni, the ova 

 are laid in anything but the neatly packed cakes or layers of ova 

 of either parent. In appearance they are almost the same as those 



