64 Journal New York Entomological Society. [Vol. xx. 



favorite place, as it offers more protection at first, being of the same 

 yellow-red as the nymphs. The nymphs rest in one place most of 

 the time ; before shedding they become very restless and look for a 

 suitable place. In the first stage, especially, I noticed that they pre- 

 ferred the under side of the leaves. They seem not to like to be ex- 

 posed to light during ecdysis. I had been watching one ready to shed, 

 and it moved out of the sunlight, at the last minute, where I had put it 

 to see the breaking open of the thoracic integument. A little later 

 the insect was already partly out. During the process the nymph 

 stretches the whole body, and owing to this extension, the skin breaks 

 open on the upper part of the head and thorax; the insect then pulls 

 out the head first, then the thorax with the legs, and finally the 

 abdomen, usually resting for a little while on the empty shed skin, 

 before leaving it. This process takes place in the morning hours. 

 I seldom observed it later. The insect puts its piercing mouthparts 

 into the plant at once, as I usually found the empty, shed skin fastened 

 beside the legs. It is characterized by changes in all the larval 

 colors. In the later stages, the fore parts, the abdominal prominences 

 and anal region are whitish at first, the abdomen more or less green- 

 ish the lateral red markings somewhat restricted. In the adult stage, 

 before changing into the more or less dark brown color, these lateral 

 markings occupy only the second of three segments fully, on the first 

 and third only half the width of the segments. The whitish yellow 

 on the fore parts becomes after the second stage, as I noticed in the 

 nymph before shedding, more or less of a pinkish red; likewise the 

 abdominal prominences and anal region, but these always soon change 

 to the darker color after shedding. In the first stage, after about 

 two hours they become a very glassy gray. Then, by the night of 

 the same day, they become brownish-gray above. Ventrally the abdo- 

 men remains green, the mouthparts, pectus and femora of a dark, 

 almost black, shining brown ; except in the last nymph stage, when it 

 become a somewhat lighter red-brown. 



In the brownish gray stage the material from Chicago was re- 

 ceived. What I missed then, I found during the second day in the 

 insects under observation this season ; they appeared dorsally with a 

 whitish covering of an apparently porous nature. I found this also 

 (although slightly) on the brown-gray colored nymphs from Central 

 Park, New York. As I collected mostly all the material in the later 



