544 
OSMODES. By Dr. C. Atjrivillius. 
near the costal margin is violettish-grey and partly bordered with black; slantingly behind it a small, split 
spot; between vein 1 b and the apex a distinctly prominent, dark rust-brown band, and outside of it a similar 
incomplete line which is partly adjacent to the margin; a marginal row of brown dots; fringes reddish-brown. 
Expanse of wings: 33 mm.“ 
23. Genus: €frsm©«I< k s Wts. 
All the species of this genus are at once discernible by the white or silvery, dark-encircled dots or spots 
of the hindwing beneath (generally 4 in 1 c, 5, 7, and the discal cell), and the $$ by the brown mealy spot on 
the hindwing above. Palpi slightly bent upwards with a short conical terminal joint. Antennal club 
fusiform without a sharp point. Vein 2 of the forewing rises before or at the centre of the cell, vein 5 is feebly 
though distinctly bent at its rise, 11 runs separately. The sexes are so dissimilar above, that they must be 
separately dealt with in the review of the species. 
Review of the S S ■ 
Both wings above for a great part or for the greatest part yellow, reddish-yellow or yellowish-brown. 
Forewing beneath at the posterior margin with a black or grey hair-pencil. 
A. Forewing above with an almost equally broad, black marginal band which is proximally sharply defined. 
The mealy spot of the hindwing does not reach to the base of the wing. 
a. Hindwing above as far as the costal margin yellow, only at the apex and posterior margin narrowly 
black. The yellow colour of the forewing above reaches to the base. 
*. Larger, about 31 mm; above lighter yellow. The yellow subapical spots of the areas 6 to 9 of the 
forewing above are united with the other yellow colour by a yellow spot in area 5 and separate a 
black double spot at the end of the discal cell from the marginal band. 0. laronia. 
**. Smaller, about 27 mm, above more orange-yellow. The subapical spots 6 to 9 of the forewing above 
form a separate triangular spot, the area 5 being uni-coloured black. 0. adosus. 
p. Hindwing above at the costal margin at least as far as the discal cell broadly black. 
*. The yellow colour of the forewing above, in 1 a and I b as well as in the discal cell, reaches to the 
base of the wing, though it grows somewhat darker. The discal cell lacks the black longitudinal 
spot in the basal part. The subapical spot of the forewing is separate and rounded off. 
1. Hindwing beneath light yellow with white spots in 1 c, 2, 7, and the cell. 0. thora. 
2. Hindwing beneath dark brown with white spots in 1 c, 5, 7, and the cell. O. distinctus. 
**. The yellow colour of the forewing above does not reach to the base of the wing in the discal cell 
or it is parted there by a black longitudinal spot. 
+ . The yellow colour of the forewing above, in the areas 1 a and 1 b extends to the base of the 
wing. Hindwing beneath generally with white discal spots also in 2 to 4. 
1. Forewing above in the basal part of the discal cell with a narrow black longitudinal spot, 
or quite black. Hindwing beneath between the white discal spots and the fine black marginal 
line lighter greyish-yellow. O. chrysauge. 
2. Forewing above in the basal part quite black. Hindwing beneath between the white discal 
spots and the dark marginal band of a bright yellow. O. thops. 
+ + . Forewing above at the base in all the areas at least as far as the base of vein 2 black, rarely 
at the costal margin covered with yellowish. 
1. The yellow discal spot of area 2 on the forewing above entirely or almost entirely fills up 
the base of its area and closely adjoins the light, spot of the discal cell. The mealy spot 
of the hindwing above is dark and distinctly prominent. 
a. Forewing with yellow discal spots in 1 a, 1 b, 2, 3, 6, 7, 8. 0. adon. 
b. Forewing above without yellow discal spots in 1 a and lb, or only with a longitudinal 
streak at the costal margin in 1 b, but in 2 to 8 with yellow discal spots. O. banghaasi. 
2. The yellow discal spot of the area 2 of the forewing is broadly separated from the spot 
of the discal cell by the black ground-colour. The mealy spot of the hindwing is of a light 
colour. O. lux. 
B. Forewing above at the margin only gradually somewhat darker brown with black veins and a fine black 
marginal line. The mealy spot of the hindwing is large and almost reaches to the base of the wing. 
0. costatus. 
