tub: C.VJfADLVN KN rOMOLOGIST. 215 



and conceals the egg. When, on the other liand, the bud is scarcely open, 

 the egg is placed upon the outer face of tl:e bud scale, near the stem. A 

 confined t'emale, after ovipositing on all the buds of the plant supplied, 

 placed her two last eggs on the petioles of leaves. Ovipositing takes 

 place in the middle of the day, and each female disposes of about sixteen 

 eggs. In nature, these are placed singly, never more than one on any 

 plant, but unlike inis, the female of this species will often oviposit several 

 times within a radius of a {t\s feet. 



The egg. — Turban-shaped, top slightly depressed ; micropyle, a 

 rosette of cells, still further depressed ; bottom flat or irregularly indented. 

 Sides ornamented with low rounded bosses in series, each connected with 

 the nearest ones surrounding it by slightly elevated ridges, which are 

 broadened out midway between ihe bosses, and are exceedingly irregular 

 in outline, a character which serves at once to distinguish the egg from 

 that of the congeneric species (as far as these are known). Cell walls of 

 bottom and of micropyle narrow, clear-cut and of uniform width. At the 

 edge of the micropyle the walls broaden abruptly, and the sculpture of 

 the surrounding area is similar to that of the sides, except that the bosses 

 are wanting. Plate III, fig. i, shows the micropyle and depression; fig. 

 2, a part of the surface sculpture from the region of greatest diameter; and 

 figs. 3 and 4, the top and side. When first laid, the egg is light 

 green, with a faint bluish tinge, which disappears within a few hours. The 

 colour gradually changes as the embryo larva develops, from light green 

 to yellow-green, to greenish-yellow, and, finally, from four to thirteen 

 hours before the birth of the caterpillar, to chalky-white. 



Period of ificubation. — On xvlay loth, 1905, I obtained sixteen eggs 

 from a female confined over Kahnia. These were laid between 10 a.m. 

 and 3.30 p.m., and all hatched between 2 and 11 p.m. on May 15th. An 

 egg laid on Kahnia at 11. 11 a.m., May 3rd, 1905, hatched during the 

 early morning of May 9th. Another, laid on Vaccinium 2X 11.38 a.m., 

 May 8th, 1905, hatched between 10 a.m. and 2 p.m. on May nth. Only 

 one egg was secured this spring. It was laid at r.20 p.m.. May 14th, 

 arid hatched at 3.25 p.m. on the 18th. From these instances it will be 

 seen that the period of incubation varies from three to almost six days. 



The I aival stages. — I have been unable to discover eggs on the food 

 plants, except when I have seen the female oviposit, and although I have 

 spent many hour.s in the search, I have never found a newborn larva. 



