Pieridae--Gothic, Colorado butterfly collection--Tom Peterson
Mustard White (Pieris napi) (43 mm)
Gunnison County, Colorado 
Lily Lake, 10200 ft 
6 July 1974

Western White (Pontia occidentalis)
Gunnison County, Colorado
Mt. Bellview, 12500 ft 
29 June 1974
 

Becker's White (Pontia beckerii) 
Gunnison County, Colorado 
Gunnison, 7700 ft 
31 July 1974
 
Large Marble (Euchloe ausonides) 
Gunnison County, Colorado 
Lily Lake, 10300 ft 
6 July 1974
Clouded Sulphur (Colias philodice) (43 mm)
Gunnison County, Colorado 
Kettle Ponds near Gothic, 9500 ft 
20 July 1974

Queen Alexandra's Sulphur (Colias alexandra) 
Gunnison County, Colorado 
Brush Creek, 8900 ft 
10 July 1974

Queen Alexandra's Sulphur (Colias alexandra) 
Gunnison County, Colorado 
Brush Creek, 8900 ft 
10 July 1974

Mead's Sulphur (Colias meadii) 
Gunnison County, Colorado 
Cumberland Pass, 12000 ft
17 July 1974

Mead's Sulphur (Colias meadii) 
Gunnison County, Colorado 
Cumberland Pass, 12000 ft 
17 July 1974