Latin Name:  Colias alexandra Edwards, 1863b
                        (N. Kondla, det.)

Wingspan:  40 - 55 mm

Range:  Southern 1/4 of Alberta

Habitat:  Grasslands

Time of year seen: May to September

Caterpillar's Diet: Pea family plants

Other:  There are two brood of the Alexandra Sulphur each year.  One from May 13^th to July 3^rd, peaking between late May to mid June and  the second from July 23^rd to September 1^st, peaking in late July to mid August.  Female C. alexandra are white with significantly reduced wing borders.  Both the males and females have a characteristic unringed white discal spot on the ventral hind wing surface.  (Bird et al, 1995 and Acorn, 1993)