22J 



It will be seen that she continued laying eggs for fifty-five 

 days, until her death occurred ; and that the eggs hatched, up 

 to about the last ten days of her life when only a few hatched of 

 those laid. 



This experiment proves that the frequent copulation which 

 had been observed during the egg-laying period was not neces- 

 sary. 



The eggs hatch in 3 to 6 days, usually in 4 days. The larvae 

 molt 3 times before pupating, at intervals of 2 days and there are 

 5. to 6 days between the 3rd molt and pupation. In the first three 

 stages the larvae are black. There are four rows of spiny 

 tubercles on the back, after the third molt the head is dull yel- 

 low ; broad sides of the pronotum light yellow, also the four 

 tubercles of the first abdominal segment and the two dorsal 

 tubercles of the 4th, 5th and 6th abdominal segments. The 

 two dorsal tubercles on the 4th and 5th segments are often 

 yellow after the second molt. As the larva approaches full growth 

 it becomes lighter colored, somewhat yellowish, from the 

 stretching of the skin between the black portions of the seg- 

 ments. This is especially so if the larva is very well fed. Size 

 full grown is II mm. and this is attained in about 11 -13 days, 

 according to the abundance of food supply. (PI. XV, fig. 3.) 



The fullgrown larva suspends itself by the posterior end in 

 some sheltered place, and in a day or two molts again and the 

 pupa is formed. (PI. XV, fig. 4.) It is about 5 mm. long by 

 3 . 5 mm. wide ; light brownish yellow with black markings as 

 follows : a pair of triangular spots on prothorax, their bases at 

 posterior margin, often irregular lines extending from their 

 apices to the anterior margin of prothorax; dorsum of meso- 

 thorax with 2 roundish spots at posterior margin, from these, 2 

 black stripes, widening posteriorly, extend backwards across 

 the metathorax; a black line along the inner edge of the wing 

 pads, another line parallel to it a short distance from the mar- 

 gin, often these lines are contiguous; a pair of black markings 

 on each of segments 3, 4, 5 and"6 of the abdomen; those of seg- 

 ments 4, 5 and 6 are triangular with their bases at the posterior 

 margin of the segments; those on the 3rd segment are quite 

 irregular in shape longer transversely; sometimes a pair of 

 small spots on 2nd segment. 



The pupal stage lasts for 4 to 6 days, during which the adult is 

 developing and when this is accomplished the Dupa splits on 

 the dorsal median line and the adult crawls forth. It is soft 



