194 Journal New York Entomological Society. [Voi. xv 



Hatching. 



Just previous to hatching, the eggs are dusky yellow, due to the 

 inclosed embryo. The eggs in a mass turn this color almost simul- 

 taneously, about from eight to twelve hours before hatching. Through 

 a lens the body of the fully-developed embryo is distinctly visible, 

 and its distinct segmentation gives the egg a dark-ringed appearance, 

 throughout its length. The embryo is erect, the setge more or less 

 visible as short irregular streaks of black, but the disposition of the 

 legs is not distinct. The basal one-third of the egg is darker. The 

 ocellar spots of the embryo are visible as a small group of three 

 minute dots in a triangle on the latero-cephalic aspect (/. e., on each 

 side of the anterior end), and the tips of the mandibles between these 

 two groups as two fainter red dots on the ventro-cephalic aspect of the 

 egg. The two black papillar spots on the pronotum are also distinct, 

 and the median line of the two posterior segments of the thorax. 

 Just previous to eclosion, the egg is somewhat swollen at its cephalic 

 end. 



The egg-shell parts along the dorsal aspect from the apex down 

 to about half its length, and the head of the larva at once appears. 

 The body is gradually worked out until the legs are free, when the larva, 

 holding itself erect by means of the unexcluded terminal segments, 

 exercises the legs back and forth until they are strong and dry. At 

 first, the legs are disposed along the ventum. The act of hatching 

 varies in time, averaging from about 50 to 70 minutes. The larva then 

 frees itself from the egg and rests upon the mass. It is then normal for 

 instar I, excepting for the pale yellow color of the legs, ventum and 

 the head and its appendages, which form a decided contrast to the 

 dusky color of the dorsum. 



The egg-shells are not eaten. Forty-six young larvte, hatching dur- 

 ing the first week of June, 1907, and starved in confinement, lived on 

 an average of four and one half days, ranging from four to five days. 



Each clutch of eggs was confined in darkness, under the cover of 

 small paste-board boxes, and also in-doors, so that the period must be 

 considered as not absolutely natural, though under the usual laboratory 

 conditions. These conditions are stated in case it is shown in the 

 future that the presence or absence of direct or indirect sunlight have 

 the effect on the period of incubation of this insect attributed to them 

 in regard to those of other animals. In nature, the eggs are seldom 



