The butterfly figured on Plate 120 is brownish-orange, with black veins and margins on all the wings. White spots are arranged in double rows on the black outer margin of each wing, and there are seven other rather larger white spots on the black apical patch of the fore wings. The male has a patch of black scales, covering the scent pouch, close to vein 2 on the hind wings. The egg is long, oval in shape, with over twenty low upright ridges and many cross-lines; is of a pale green colour; and is laid singly on the food-plant of the caterpillar (various kinds of milkweed, especially the commonest kind, _Asclepias cornuti_), and usually upon the under surface of the upturned apical leaves near the middle. The egg state lasts only about four days (Scudder). The caterpillar has the head smooth and rounded, yellow, conspicuously banded with black. Body cylindrical, tapering a little in front, naked, but with two pairs of long and very slender black thread-like filaments, one pair, the longer, on the second thoracic, the other on the eighth abdominal segment. The body is white, with numerous slender black and yellow, and especially black, transverse stripes, repeated with considerable regularity on each of the segments, so that there are nowhere any broad patches of colour (Scudder). [Illustration: _Pl._ 68. =Heath Fritillary.= 1, 2, 3 _male_; 4, 5, 6 _female_.] [Illustration: _Pl._ 69. =Glanville Fritillary.= _Eggs, natural size and enlarged; caterpillar and chrysalis._] The chrysalis is stout and not elongated, largest in the middle of the abdomen; where it is transversely ridged; elsewhere it is smooth and rounded, with no striking prominences, but with little conical projections at most of the elevated points, like those which half encircle the body at the abdominal ridge, all of a golden colour except the latter, which are situated in a tri-coloured band, black in front, nacreous in the middle, and gilt behind (Scudder).