14 Journal New York Entomological Society. [voi. ix. 



one of these, besides the presence of one of the Euthamia, is a light 

 and dry sandy soil, where water can not collect. 



May 24th, six females were exposed near Woodside in three different 

 places. Earlier trials with prematurely appearing females had been un- 

 successful. A heavy rain set in that night lasting until the following 

 noon ; nevertheless early in the morning two of the females were 

 found fertilized, they deposited eggs by degrees until May 27th, when 

 they died. 



Egi::. — Almost spherical, slightly higher than the widest diameter 

 of 0.5 mm., pale yellowish green. Around the sunken, circular, 

 shallow vertex arise eight equidistant prominent ribs, eight to ten more 

 arise above the middle of the t^^g, so that at the base sixteen to twenty 

 vertical equally well defined, rather robust ribs pass across the base, 

 eighteen to twenty equidistant striae cross horizontally, giving the 

 empty eggshell the appearance of being covered with a fine regular 

 network. 



The yellowish green color of the egg changes after 36 to 48 hours 

 to a paler green ; a purplish brown stripe encircling the middle and a 

 spot of the same color spreading gradually from the vertex ; soon the 

 whole upper half is pale purplish brown, the vertical ribs, especially 

 those near the summit, turning transparent and colorless. By June 

 2d all the eggs had hatched, the young larvse eating an opening side- 

 ways, leave the colorless membrane intact. 



Stage I. — Soon after hatching the young larvae become active, 

 collecting in numbers on the branchlets and at the slightest touch sus- 

 pend themselves by silken threads. They are slender, about 2.5-3.0 

 mm. long when resting, slightly widening from the third thoracic seg- 

 ment towards head. Head perceptibly wider than the body, flat, uni- 

 formly very light brownish, clypeus paler, ocelli darker brown. 

 Ground color yellowish green, but being almost transparent the con- 

 tents of the inner organs changes the color to various tints of darker 

 green. The larvae are geometrid-like, distinctly hunched on eleventh 

 segment ; the first two pairs of abdominal legs undeveloped. Tuber- 

 cles small, black, the single bristles about half as long as the width of 

 the body, also black. Feet concolorous with body. Thoracic feet 

 spread sideways when walking. 



Stage II. — (June 7th.) Length of larva about 4.0 mm., width of 

 middle of body 0.5, of head 0.52 mm. Body slightly tapering to- 

 wards last segment, nth segment perceptibly hunched. The varia- 



