ACTIAS.—ATTACUS. 189 
3. Actias dictynna. 
Tropea dictynna, Walk, Cat. vi. p. 1264' (nec Maassen & Weymer). 
Hab. Mexico, Orizaba (Sallé, mus. Brit.).—Locality ?} 
The insect figured by Maassen and Weymer under the above name represents another 
species, China being given as its locality. I have not the slightest doubt that the species 
described by Walker (the type of which is in the Oxford Museum) is identical with the 
Mexican insect in the British Museum, and in all probability came from the same 
collection. 
ATTACUS. 
Attacus, Hiibner, Verz. bek. Schmett. p. 155; Walker, Cat. v. p. 1200. 
Four species were placed under this name by Hiibner; Walker on describing the genus 
included in it no less than twenty species, some of which are, however, now eliminated. 
Atiacus is very widely distributed. various species being found throughout Asia, Africa, 
and Tropical America; the Old and the New World species resemble each other very 
closely. In our country the genus is well represented by seven species, sever] of which 
are also common to Tropical South America. 
1. Attacus hesperus. 
Phalena Attacus hesperus, Linn. Syst. Nat. p. 809; Mus. Lud. Ulr. p. 367; Cram. Pap. Exot. i. 
p. 105, t. 68. f. A*; Gmel. ed. Syst. Nat. i. pt. 5, p. 2401. 
Bombyx hesperus, Fabr. Syst. Ent. p. 557; Sp. Ins. ii. p. 167; Mant. Ins. 11. p. 108; Ent. Syst. 
ili. p. 408; Oliv. Enc. Méth., Ins. v. p. 24. 
Bombyzx splendida, Pal. de Beauv. Ins. Afr. et Amér. p. 133, t. 22. ff. 1, 2”. 
Attacus hesperus, Hiibn. Verz. bek. Schmett. p. 156; Walk. Cat. v. p. 1209°. 
Atiacus splendidus, Clemens, Proc. Acad. Phil. xii. p. 160*; Walk. Cat. xxxii. p. 524”. 
Hab. Norru America, Texas ‘**.—Costa Rica (Van Patten), Irazu 6000 to 7000 feet 
(Rogers).—Gutana, Roraima, Surinam'; Amazons, Santarem (Bates*); SouTH-East 
Brazin*.—Santo Domingo’. 
This species has a very extended range, but does not appear to be common anywhere. 
I have not seen a specimen from North America. The insect figured by Palisct de 
Beauvois as Bombyx splendida is, without doubt, the female of Attacus hesperus. I 
have before me specimens of both sexes, agreeing perfectly with Cramer’s and the 
above-mentioned figures. 
2. Attacus orizaba. 
Saturnia orizaba, Westw. P. Z. S. 1853, p. 158, t. 32. f. 2*; Ann. & Mag. Nat. Hist. 2nd ser. xv. 
p- 2947. 
Attacus orizaba, Walk. Cat. v. p. 1201°. 
Hab. Muxico? (Coffin 12), Cordova (Riimeli), Jalapa (Hoge, Morrison), Guanajuato 
