THECLA Galathea,
Red-bordered Hair-streak.
Generic Character.
Antennæ clavo elongato, compresso, obtuso terminatæ. Palpi exserti, recti, approximantes, squamis obtecti, imberbes, articulo ultimo nudo, gracili, acuto. Oculi semicirculares. Alæ anticæ trigonæ; posticæ dentatæ, caudatæ, lobo ad angulum analem obtuso, concavo, quem sedentes vibrant, instructæ. Thorax validus. Abdomen gracile.
Typus Genericus Papilio Betulæ, &c. Lin.
Antennæ ending in a lengthened, compressed, and obtuse club. Palpi exserted, approximating, covered with scales, but without hairs, the last joint naked, slender, acute. Eyes semi-circular. Anterior wings trigonal, the hinder dentated, generally tailed, with an obtuse concave lobe at their anal angle, which is generally in motion when the insect is at rest. Thorax strong; body slender.