346 Transactions. — Zoology. 



Ab. obsoleta, n. ab. Fig. 5. 



Anterior wings : Ground-colour pale-yellow with an orange 

 suffusion at base, longitudinally and posteriorly ; no other mark- 

 ings. One specimen. 



Ab. obscura, n. ab. Fig. 6. 



Anterior wings wholly covered with fine sheeny dark- 

 fuscous dots obscuring all markings except faint costal marks 

 at £ and J, and faint lunar mark ; apex of anterior wings tipped 

 pitchy ; thoracic tufts pitchy. One specimen. 



Ab. nigra-extrema, n. ab. Fig. 7. 



Anterior wings black, costal area to £ light-fuscous with 

 black dots, and spot at £; fuscous mottling at § in middle of 

 wing, similar mottling from lunar mark to anal angle. Several 

 specimens, one having purplish-red ground - colour instead of 

 black. 



The female deposits a circular semitransparent mass num- 

 bering some twenty-nine ova, symmetrically imbricated, closely 

 appressed. If laid on a green leaf, reflection of the natural tint 

 of the leaf through the ova must afford greater protection than 

 any colour of the egg-shell could do. Ova deposited 22nd Janu- 

 ary, 1902, hatched 5th February — 14 days. Ova deposited 

 20th February, 1903, hatched 5th March = 13 days. 



Ovum (figs. 9, 10, 11) : Each ovum is oval in outline, slightly 

 convex above and covered with a rather large crystalline pattern 

 composed mostly of pentagonal but some hexagonal figures. 

 Examined some hours after they were deposited each ovum had 

 inner and outer circumferences, the pale-greenish egg-contents 

 not reaching the outer wall of the ovum ; the micropyle, forming 

 a rosette of small elongate figures, is situated towards one end of 

 the ovum on this rather wide marginal area. The ovum is 

 always so placed in relation to the egg-mass that the micropyle 

 is outwards and not covered by other ova. The first ovum 

 laid forms the centre of the egg-mass to the disadvantage of the 

 ensuing larva, which may — as it did in one instance — fail to eat 

 through the overlapping edges of surrounding ova. 



For two days the ovum contained only yelk spherules and the 

 protoplasmic fluid whence the embryo ultimately develops : 

 no cellular activity was observed. 



In seven days the embryo reached an advanced stage, having 

 formed, though neither caput nor thoracic segments could be 

 detected, and at the head area, towards the micropyle, a large 

 quantity of outer (greenish) spherules remained ; the ocelli of 

 the caput were distinct, the thoracic legs exceedingly long, out- 



