188 HETEROCERA. 
identical with that of Cramer. Maassen and Weymer’s, and also Felder’s, figures are 
coloured dark at the base of the primaries and along the costal margin, in Cramer’s 
figures these parts are quite pale. 
ACTIAS. 
Actias, Leach, Miscell. ii. p. 25 (1815). 
Tropea, Walker, Cat. vi. p. 1259 (partim). 
Leach founded this genus upon two species, 4. luna, Linn., from North America, 
and A. selene, from India. Three species, including A. luna, are known to inhabit our 
country; others are found in the Old World. The African species seem to me to 
require separating ; the genus Tropwa, (Hiibn.) Walk., might be retained for these. 
1. Actias luna. 
Phalena Attacus luna, Linn. Syst. Nat. i. 2, p. 810; Mus. Lud. Ulr. p. 370; Clerck, Icon. t. 52. 
f. 2; Cram. Pap. Exot. i. p. 3, t. 2. f. A; Gmel. ed. Syst. Nat. i. p. 5; Abbot and Smith, Ins. — 
Georg. i. pp. 95, 96, t. 48*; Drury, Ill. Exot. Ins. i. p. 49, t. 4. f. 1. 
Bombiz luna, Palis. de Beauv. Ins. Afr. et Am. pp. 183, 184, t. 22. f. 3. 
Bombyx luna, Fabr. Sp. Ins. ii. p. 170; Mant. Ins. ii. p. 109; Ent. Syst. iii. 1, p. 414. 
Tropea luna, Hiibn. Verz. bek. Schmett. p. 152; Walk. Cat. vi. p. 1260°*. 
Hab. Nortu America ! ? 3,—Mexico, Jalapa (Hoge). 
This common North-American species occurs sparingly in Mexico, but I have not 
seen it from any locality further south. The specimen from Mexico in the British 
Museum included by Walker with A. Juna is quite distinct, and agrees well with his 
description of Tropewa dictynna. The larve and pupa of A. luna are well figured by 
Abbot and Smith; the larva is said to feed upon Liguidambar, Diospyros virginiana, 
and different kinds of walnut. 
2. Actias azteca. 
Actias azteca, Packard, Guide to the Study of Insects, sixth edition, p- 298°. 
Hab. GuatuMata, West Coast ! (mus. Peabody Academy). 
Mr. A. 8. Packard (doc. cit.) states that this species differs from A. luna in its much 
smaller size, expanding only 34 inches, shorter fore wings, the apex being much rounded, 
and with shorter veins, while the “tails” on the hind wings are only half as long as 
those of A. luna. It also differs in having the origin of the first subcostal venule much 
nearer the discal spot than in A. Jwna, being very near that of the second subcostal 
venule. It is whitish-green, with markings not essentially differing from those of 
A, luna. 
I have not seen this species, but think it quite likely that it is nothing but a dwarf 
form of A. Juma. I have in my collection several specimens of A. luna, reared in this 
country, that correspond well with the above description. 
* The synonymy given is taken from Walker’s Catalogue. 
