IIG CATERPILLARS AND THEIR MOTHS 



Oil the sixth day after they were laid the eggs began 

 to turn yellow, and on the ninth day they hatched, 

 giving little bright yellow caterpillars with long, curv- 

 ing caudal horns which soon turned black, and having 

 short unnoticeable setae. Two years later we had an- 

 other lot of eggs, which hatched in six days after they 

 were laid. This was in July. The egg-period is, there- 

 fore, not always the same, though one of six days is 

 more common than one of nine. 



The little caterpillars were given grape-leaves. They 

 did not eat their shells, but drank thirstily, then began 

 to eat the leaves, and grew greener as they ate. They 

 were very active, and several escaped through a tiny 

 crack where the corner of the box-cover did not fit per- 

 fectly, and in spite of wet scrim which was over the 

 top of the box. This was our first proof that round- 

 topped boxes were safer for young caterpillars. 



The second brood had straight horns and were fed 

 on woodbine. 



The first brood molted six days, the second four 

 days, after hatching. The first brood came out greener 

 yellow, with deeper green below the white subdorsal 

 liue, which extended from head to horn. The abdom- 

 inal segments were much whiter on the dorsum than 

 the thoracic, and had a green mark, shaped like 

 a two-tined pitchfork-iron, on each segment. The 

 caudal horn was whitish at base, and reddish or pur- 

 plish the rest of the way to the tip. The head and 

 legs were green. The anal shield had a faint whitish 

 edge. The third and fourth segments were larger on 

 the sides than any of the others, a characteristic of 

 this family, and specially marked in myron^ which 



