ON THE IDENTIFICATION OF ATTACUS ATLAS. 187 
A large dark-coloured form from the Philippines, closely 
allied to Attacus atlas, as figured by Cramer, and probably not 
truly distinct. The second ' transparent spot of the front wings 
is obsolete. 
Var. c. Attacus taprobanis, Moore. 
Attacus taprobanis, Moore, Lep. Ceylon, ii. p. 124, pl. 127, 
ff. 1, la (1883). 
This form differs from the true A. atlas in the transparent 
spots being small and triangular; the second transparent spot 
of the front wings is often obsolete. It is the ordinary form in 
Ceylon, but I have seen specimens ciesely resembling it from 
various parts of India. 
Attacus edwardsti, White. 
Attacus edwards, White, Proc. Zool. Soc. Lond. 1859, p. 115, 
t. 57. 
A handsome species, with the second transparent spot on 
the front wings obsolete. Easily recognised by its very dark 
colouring, and the sharp contrast formed by its white markings. 
Aitacus crameri, Feld. 
Attacus crameri, Feld., Sitz. Akad. Wiss. Wien. xliii. p. 31, 
n. 67 (1861). 
A. atlas, Stoll, Pap. Exot. iv. tt. 381c, 3824 (1782). 
A very distinct species, with small transparent spots near 
the middle of the wings, instead of touching the dentated black 
line, edged outside with white, which crosses both wings in all 
the allied species. 
Attacus cesar, Maass. 
Attacus cesar, 2, Maass. & Weym., Beitr. Schmett. i. f. 22 
(1873). 
A female from Mindanao, greener than the allied species, 
with three transparent spots on each wing ; the smaller ones, at 
least, contiguous to the white band. 
Attacus imperator. 
Attacus imperator, Kirb., Cat. Lep. Het. 1. p. 746, n. 5 (1892). 
A. cesar, 3, Maass. & Weym., Beitr. Schmett. i. f. 23 (1873). 
This insect comes from Bohol, not Mindanao, and differs 
so much from the supposed female that I dare not put them 
together without proof. There are three small transparent spots 
on the front wings, and two contiguous ones on the hind wings. 
Attacus (?) vitrea. 
Phalena arcuata-vitrea, Perry, Arcana (1811). 
Perry’s figure appears to have been taken from a specimen 
belonging to the group of Attacus atlas, though he states that it 
