COLIAS III. 
COLIAS EURYTHEME. 1—6. 
Colias Eurytheme , (Eu-ryth'-e-me), Boisduval. Ann. Ent. Soc. de Fr. 1852. Amphidusa, Boisd. 
ib. Edusa,V ar. Calfornica, Men^tries, Cat. Imp. Acad. Sci. St. Petersb. Edusa? Boisd. and Lee. p. 61. 
Male. Expands 2 to 2.3 inches. 
Upper side uniform bright orange, with an opaline reflection ; costal and abdo- 
minal margins sulphur yellow ; base of primaries covered with black scales which 
extend a little way along inner margin ; base of secondaries covered in same man- 
ner as also part of cell and of lower median interspaces ; primaries have a large 
black sub-ovate discal spot ; marginal band broad, black, crossed at apex by yel- 
low nervules, the general direction of the inner edge, from submedian to disco-cen- 
tral, being parallel to the margin, sometimes crenulate and sometimes nearly straight, 
with a slight projection on the sub-median ; from the disco-central curving to cos- 
tal edge and diminishing to a point at about one-third the distance from apex ; on 
inner margin throwing out an acuminate branch, which is depressed on upper side 
and terminates nearly at the middle of margin. 
Secondaries have the border one-half the width of that of primaries, erose with- 
in, commencing half way between the costal and upper branch of sub-costal and 
ending at first branch of median ; a rounded deep orange discal spot, upon the an- 
terior edge of which is sometimes a dot of same color ; fringes yellow at base, rose- 
ate at extremity. 
Under side deep yellow, usually with an orange tinge upon disk of primaries ; 
costal margin of primaries and disk lightly powdered with fine black scales ; a 
sub-marginal transverse row of small black patches, the three lower distinct, others 
more or less obsolete ; three black dots in the sub-costo-apical interspaces near the 
edge ; discal spot black, oval, enclosing a streak which is yellow, or sometimes mar- 
garitaceous. 
Secondaries have a row of faint brown points parallel to margin, a small patch 
on costa ; a round discal margaritaceous spot, in a brown ring, about which is a 
second, paler and broader ; at insertion of median a small red spot ; costal edges 
and fringes of both wings roseate. 
Body above covered with greenish-yellow hairs, which, on the collar, are 
roseate at extremity ; abdomen black above, partly covered with yellow scales ; 
under side yellow ; legs pale roseate ; palpi yellow beneath, black above ; an- 
tennae and club pale roseate. 
