This specimen has all-orange palpi... Cat. lep. Ph. Brit. M. 400. Agylla nivea. Lithosia nivea, W1k. vii. 1778 (1856) ; Kirby, Cat. Het. p. 338. Halesidota monoleuca, Wik. xxxv. 1911 (1866) ; Kirby, Cat. Het. p. 337. Crambomorpha argentea, Feld. Reis. Nov. pl. 106. f. 10 (1874); Druce, Biol. Centr.-Am., Het. i. p. 182; Kirby, Cat. Het. p. 337. male. Silvery white; palpi orange, black at tips; frons blackish ; vertex of head white or orange; antenne orange; legs mostly orange, fore tibize and tarsi streaked with black ; abdomen white, pale yellow, or orange-yellow. Fore wing with the costa orange. female . Fore wing without orange on costa. Ab. 1. Tegule and fore part of patagia and thorax suffused with fuscous. (a) argentea, vertex of head yellow; (6) florecilla, vertex of head fuscous. Ab. 2. plateada. Tegule and fore part of patagia and thorax tinged with metallic green. Exp. 30-48 millim. A. nivea Wkr. (= monoleuca Wkr.) (37 c) is a very common and widely distributed species. Body and wings silvery white. Palpi orange, with a black terminal joint; forehead blackish, vertex white or orange- yellow, antennae orange, so are the legs, which are partly striped black. Abdomen white, light yellow or orange- yellow. Costa of the forewing in the orange, in the $ white. — The form in which the collar and anterior half of the thorax, inclusive of the anterior half of the shoulder-covers, are tinged brownishgrey, is called: argentea Fldr. (= virginea Schs.), if the vertex is orange-yellow, — florecilla Dogn. if it is coloured brownis-grey. -—- plateada Dogn. is quite a different form, in which the collar and anterior half of the thorax and shoulder-covers are coloured metallic green. Expanse of wings: 30 to 48 mm. Distributed from Mexico through the whole of Central America as far as Ecuador and Bolivia.