46 JOUENAL OF ENTOMOLOGY AND ZOOLOGY 



brownish gray shortly before hatchnig. Most of the eggs are 

 deposited early in the morning. The egg-laying period begins 

 when the female is about five or six weeks old and lasts from two 

 to four weeks, the eggs being laid a few at a time. The number 

 of eggs deposited by seven females during their egg-laying periods 

 was as follows: No. 1, 54; No. 2, 69; No. 3, 84; No. 4, 59; 

 No. 5, 124; No. 6, 25; No. 7, 1 1 ; average, 61. As a rule, a 

 single female deposits from forty to ninety eggs. It usually requires 

 from two to ten minutes to deposit a single egg; in exceptional cases, 

 about twenty-five minutes may be required. 



3. The Method of Egg-hatching 



The time required for the hatching of a single egg varies from 

 twenty to thirty minutes. The following is an account of the hatch- 

 ing observed in the laboratory on January 25, 1913 : 



At 3 :52 p.m. — the egg cracked anteriorly. 



At 4 :03 p.m. — the head and antenns appeared. 



At 4:18 p.m. — the front and middle legs appeared. 



At 4:21 p.m. — the hind legs appeared. 



At 4:23 p.m. — larva left the egg shell. 

 The writer has observed the egg-hatching more abundantly in 

 the afternoon than in the morning. One observation was made to 

 find out the number of eggs which hatched at the different periods 

 of the day under the normal temperature and favorable condition 

 In the laboratory, and the result was as follows: 



Afternoon Night Forenoon 



No. 1 (female) 6 2 2 



No. 2 (female) 4 3 1 



No. 3 (female) 2 



No. 4 (female) 8 1 3 



4. First Larval Stage (active period) 



The orange colored larva, when first hatched, is about the same 

 size and shape as the egg. The five segmented antennas (PI. I, 

 Fig. 7), three pairs of legs, and a pair of long hairs from the pos- 

 terior margin of the body are plainly visible (PI. I, Fig. 5). Most 

 of the active larvae crawl out from beneath the mother's scale within 



