106 
LEPIDOPTERA IN PICA. 
IXIAS PIRENASSA. 
Plate 583, figs. 1, la, lb, lc, 9 (Wet-season Brood), Id, le, If, lg, $ J (Dry-season Brood), 
lh, li, lj, lk, (J 2 (Extreme Dry-season Brood). 
Thestias Pirenassa , Wallace, Trans. Ent. Soc. 1867, p. 395, pi. 9, f. 4, $ (Dry Form). 
Ixias Pirenassa , Butler (part), Ann. Mag. Nat. Hist. 1898, p. 140. 
Ixias Pyrene , Bingham (part), Fauna of Brit. India, Butt. ii. p. 193 (1907). 
Wet-season Brood (Plate 583, figs. 1, la, lb, lc, $ ?). 
Male. Upperside yellow. Forewing with the orange subapical fascia moderately 
broad, its black inner border narrow, the base of costal margin blackish scaled. Hind- 
wing with a broad black marginal band. Underside pale yellow unmarked. 
Female. Upperside white. Forewing with the subapical fascia white, its black 
inner border irregular ; the base of the costa dusky-grey scaled. Hindwing with the 
marginal band broad. Underside pale yellow. Forewing with a slightly defined 
dusky discocellular spot, transverse discal spots and a patch at posterior angle. Hind- 
icing with slightly defined costal spot, and discal spots with whitish centres. 
Expanse, $ 2 to 2\, ? 2 inches. 
Dry-season Brood (Plate 583, figs. Id, le, If, lg, $ $). 
Male. Upperside. Forewing similar to Wet form. Hindwing with the marginal 
band narrower than in that form. Underside. Forewing with a small blackish 
discocellular spot, and transverse discal spots. Hindwing with a small discocellular 
spot, and a discal series of spots, the costal and two medial-discal being the largest and 
white-centred. 
Female. Upperside pale yellow. Forewing with the subapical fascia orange, its 
black inner border irregular. Hindwing with a broad marginal band. Underside 
brighter yellow than in the Wet form. Both wings with the markings more developed 
than in the Wet form, the discal spots being whiter centred. 
Expanse, $ $ 2 to 2| inches. 
Extreme Dry-season Brood (Plate 583, figs, lh, li, lj, Ik, $ 9). 
Male. Upperside. Forewing similar to the ordinary Dry form, the black inner 
border to the orange fascia somewhat broader. Hindicing with the marginal band 
narrower and macular. Underside paler yellow than in the ordinary Dry form. Both 
wings slightly flecked with strigse. Forewing with the discocellular spot larger and the 
discal spots on both wings much less apparent. 
Female. Upperside white. Forewing with the subapical fascia pale yellow, its 
black inner border medially very narrow. Hindwing with a slightly-defined narrow 
dusky upper marginal decreasing somewhat-macular band. Underside very pale 
yellow. Forewing with the discocellular spot and transverse discal spots more distinct 
