152 Journal New York Entomological Society, ["^'o'- -"^-"^^v, 



ings, as described in a former article^ they appeared at first blue- 

 green with yellow markings gradually fading to a white and black 

 color instead of brown, except that the base of the prothorax just 

 above the head, continued a bright emerald green for some time be- 

 fore turning to white. Where, however, the black markings occur 

 in the completed insect at first a grayish color became visible, and 

 gradually deepened into black. The entire change was completed 

 within twenty-four hours. 



The insects were very restless in captivity, and 6 of the lo col- 

 lected died, only 4 becoming adult, i. c, two of the black and white 

 insects and the two green and white ones above mentioned. In 

 moulting from the fifth to the adult stage all four of these passed 

 through the same color phase (1. c, green with yellow markings) as 

 between the fourth and fifth stages. 



In all cases the change began early in the morning and was com- 

 pleted by night of the same day; the first insect on July i, two more 

 on July 2, and the last beginning at 4.30 A.M., on July 8. The adult 

 color assumed in each instance was dark purplish brown, charac- 

 teristic of the darker color-variation occasionally seen in E. biiiotata. 

 No insect of this adult color was found by me in collecting at this 

 same color but exclusively on walnut. 



Mr. G. J. Keller, of Newark, N. J., has kindly sent me four speci- 

 mens, one male and three females of E. biiiotata which he collected 

 on walnut June 9, at Elizabeth, N. J. These were of a similar lighter 

 color than I have found on that plant (Newark, N. J., 1909). 



Mr. Halsey J. Bagg sent me, July 19, a number of Membracidse 

 nymphs found by him on Butternut at the old Bagg Homestead at 

 Stillville, N. Y. All but one of these matured. It is remarkable 

 that these nymphs were E. biuotata with the same color variations 

 as above mentioned, i. c, some were black and white, while the rest 

 were green and white. All however were of the same purplish brown 

 color when full grown. The last two of these died July 2"]. 



