The species is subject to considerable variation. Rare in New England, but common south of latitude 40° as far as the Rocky Mountains; also reported from Southern California, where it is rare. Expanse 1.50-2.00 inches.
(2) Terias mexicana Boisduval, [Plate CVIII], Fig. 3, ♂ (The Mexican Yellow). (See Plate on [p. 184.])
Easily recognizable by our figure. Expanse 1.75-1.85 inch. Found in Texas and Arizona, thence southward.
PL. CIX
(3) Terias lisa (Boisduval & Leconte), [Plate CIX], Fig. 1, ♂ (The Little Sulphur). (See Plate on [p. 184.])
Allied to the three following species, but may be told apart at once by the solid black outer borders of the wings and the absence of the black band on the hind margin of the fore wing. Expanse 1.25-1.60 inch.
Ranges from New England to Honduras, east of the Rockies.
(4) Terias elathea (Cramer), [Plate CIX], Fig. 2, ♂ (The Florida Yellow). (See Plate on [p. 184.])
May be told from the next two species by the white hind wings. Expanse 1.25-1.40 inch.