106 New York State Coltef/e of Fore>;tr;) 



order in tlie stems of tlic plants. Only a small povl ion of the e\i^^ 

 or the neek-like structure and cap protrudes from the plant. 

 However, occasionally two or rarely three eggs are inserted in the 

 same slit or egg puncture. Sometimes five or six or even a dozen 

 eggs may be laid in rather close proximity to each other. They 

 are deposited during the latter part of July, August and Septem- 

 ber. In proportion to the size of the abdomen the eggs are quite 

 large and only a few fully formed ova can be contained within 

 the body of the female at the same time. This probably accounts 

 for the long period of egg-deposition. There is but a single genera- 

 tion a year in the Adirondacks and field observation indicates 

 conclusively that eggs, which are laid during the latter part of 

 the summer do not hatch until the following spring. Asters, in 

 which eggs had been deposited in the stems in the field, were trans- 

 ferred to small pots and placed in the laboratory at Syracuse. 

 Adult males and females were also carried to Syracuse on the host 

 plants, but all died during the latter part of September and Octo- 

 ber. The plants were destroyed by mildew during November and 

 December. The eggs, which had been deposited during July or 

 later, failed to incubate in the laboratory, but seemed to have 

 remained in a living state until they were destroyed by desiccation 

 of the stems of the asters a few weeks after the plants had been 

 killed by the mildew. 



The egg (Plate IV, Fig. e) is slightly curved, from .7 to .8 mm. 

 long and about one-third as wide. The cephalic end is distinctly 

 neck-shaped and closed by a round cap or lid. The color varies 

 from brown to dark brown or black, usually considerably darker 

 on the cephalic half and with a much lighter cap. 



Number of Instars: Exuviae, representing four different 

 instars, were found clinging to the ventral surface of the astei- 

 leaves during August. This material seems to indicate five instars, 

 but the cast-off delicate skins of the younger nymphs were badly 

 mutilated and in no condition for a drawing or detailed descrip- 

 tion. The cast-off skins of the last three instars were very common 

 and many were in almost perfect condition. Although I haA^e 

 assumed five instars, I am not positive whether there are four or 

 five nymphal stages. 



Second Instar?: Antennae stout, clothed with a few long setae, 

 the third segment about a third longer than the fourth. Head 

 with five slender bristle-like spines. The spines along the margins 

 of the thorax and abdomen, also median erect ones, slender and 

 bristle-like. The spines on the head are located in this instar 

 and also in the others as in the adult insect. The spines on the 

 thorax and abdomen are placed as in the two following instars 

 (the position and location described in next instar^, but some 

 are wanting in the last instar. Some of the bristle-like spines on 

 the abdomen are double (two arising from almost the same base). 

 Nine abdominal segments visible above. General color testaceous, 

 with very few or no bi'ownish markings. 



