COLIAS Y. 
COLIAS EURYDICE. 1—4. 
Colias Eurydice, (Eu-ryd'-i-ce) Boisd. .Ann. Soc. Ent. France, 1852. WosnesensM, M6n6tri6s, 
Catal. Acad. St. Petersburg, 1855. 9 . Rhodocera Lorquini , Boisd. Ann. Ent. Soc. France, 1854. 
Male. Expands 2.5 inches. 
Upper side of primaries dark fuscous on terminal half and on costal margin ; 
base thickly powdered with black scales and partly covered by long greyish hairs ; 
extra basal space violet pink with an opaline reflection, but changing to deep brown- 
ish yellow w r hen viewed obliquely, slightly specked next base and next costa by 
dark blue scales and cut by black nervures, deeply excavated at extremity of cell, 
moderately on submedian interspace, and projecting prominently along the upper 
median interspaces into the fuscous border; three pink streaks on costal edge near 
apex. 
Secondaries deep brownish yellow, clear yellow on costal and abdominal mar- 
gin ; immaculate, fringes roseate. 
Under side deep yellow, pale on inner margin of primaries ; costal edges pink ; 
edge of hind margin of primaries pink with deep ferruginous marginal points in 
the interspaces ; a submarginal common row of similar points, partly wanting on 
primaries ; two or three such points on costa of primaries and a small patch of fer- 
ruginous scales near outer angle of secondaries ; at base of secondaries a deep rose- 
ate streak on median nervure ; discal spot of primaries round, silvered, within a 
large black ring ; of secondaries large, round, silvered, within a broad ferruginous 
ring, on the anterior edge of which is a second ring enclosing a silver point. 
Body above covered with greyish yellow hairs, beneath yellow ; legs pink ; 
palpi yellow, pink at extremity ; antennae brownish pink. 
Female. Expands 2.3 inches. 
Upper side pale greenish yellow, more decided yellow on secondaries; immac- 
ulate, except the discal spot on primaries, which is round, pale brown. Under 
side of primaries yellow, of secondaries pale buff ; discal spots on both wings silver 
in faint pink rings. 
Lakva unknown. 
Found in California and Oregon. 
This lovely species was first made known by Dr. Boisduval who exhibited spec- 
imens of it and other Californian butterflies at a meeting of the Ent. Soc. France, 
