244 CATERPILLARS AND THEIR MOTHS 



The yellow-white substigmatal ridge was very promi- 

 nent abdominally, but gone from the thoracic seg- 

 ments. The blue-black dots were less noticeable than 

 before, and the caterpillars were very plump, smooth, 

 creamy- white on the dorsum, with a bloom over them, 

 and slightly greener ventrally. 



The caterpillars were much longer when in motion 

 than at rest, and were rather inactive, though eating 

 well. They fed on tulip- tree and sassafras, and are 

 said to eat wild-cherry, but we never could make any 

 of ours touch cherry of any kind — a marked differ- 

 ence from prometliea^ which will eat almost anything. 



AnguUfera larvae are of a creamier white than pro- 

 methea, have much smaller dots, a smoother look, and 

 a very different substigmatal edge — for it is a corded 

 edge rather than a line. They slope much more from 

 the middle of the dorsum to the tip of the anal shield. 



They fed for eleven days, growing nearly three 

 inches long and stout in proportion. The caterpillar 

 photographed was not full grown. 



On the eleventh day they began spinning, and 

 showed another marked difference from lyromethea. 

 We provided twigs with leaves depending from them, 

 as we had done for promethea, but angulifera did not 

 spin any "stem" or fasten the leaf -stem to the twig. 

 They pulled leaves together around their cocoons, or 

 fastened a leaf to the tin, spinning the cocoon be- 

 tween the two, but in no case did a cocoon dangle 

 from a twig. In all we have reared, and in spite of 

 the different conditions provided, not one angulifera 

 has ever spun, for us, a cocoon with a stem ; nor have 

 we ever seen such a cocoon spun by angulifera, 



