. The southern green plant-bug [Nezara viridula] . Sept. 12Sept. 11Sept. 25Oct. 6Oct. 29Nov. 9 5 5 6. 6 5 91322 1 For temperatures to which eggs were exposed see figure OF THE NYMPHS. The nymph issues from the egg through a circular opening at thetop v.^hich it makes by removing the cap or Ud. The b^o^\^lishT-shaped egg-burster, by means of which the cap is removed, isusually left m the eggshell when the nymph emerges. During the first instar the nymphs ordinarily cluster together,often on the eggshells, and apparently do no feedmg. After thefirst molt they begin to search for food a
. The southern green plant-bug [Nezara viridula] . Sept. 12Sept. 11Sept. 25Oct. 6Oct. 29Nov. 9 5 5 6. 6 5 91322 1 For temperatures to which eggs were exposed see figure OF THE NYMPHS. The nymph issues from the egg through a circular opening at thetop v.^hich it makes by removing the cap or Ud. The b^o^\^lishT-shaped egg-burster, by means of which the cap is removed, isusually left m the eggshell when the nymph emerges. During the first instar the nymphs ordinarily cluster together,often on the eggshells, and apparently do no feedmg. After thefirst molt they begin to search for food and soon become to the first molt, and especially durmg the later instars,the nymphs are active and when disturbed they often seek protectionby moving to places out of the disturbers range of vision. They arefound usually upon those portions of the plant on which they preferto feed—-the growing shoots and more especially the developing fruit. 1 All references to clock time refer to Standard Time. SOUTHERN GREEN PLANT-BUG, 19. •^ SJ^J^^i/>5>^C7 —^i/ZP^ty^^tyA/^^ 20 BULLETIN 689, U. S. DEPARTMENT OF AGRICULTURE. When handled the nymphs give off a disagreeable odor. Thisodor is scarcely perceptible in the case of n^nnphs in the first instarbut increases in strength in the succeeding stages. PERIODS OF NYMPHAL STAGES. Tables IV and V are introduced to show the minimum number ofdays spent by nymphs from different egg clusters in the five IV refers to nymphs kept in the office and Table V to nymphskept in the insectary. The nymphs issumg from a single egg clusterwere kept together in a cloth-covered jar containing moist tomatoes were used as food and proved very ones were placed in the jars at frequent intervals in order thatthe food supply might approximate that in the field. The jars were examined daily, and the dates given for the differentlots are those on which the first individual from a certain egg clu
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