EGG—In shape are oblate spheroid, somewhat pointed at base, and little truncated and depressetl at summit ; marked by many horizontal striæ, and longitudinally by 18 or 20 narrow, prominent ribs, which proceed from base and terminate, some of them irregularly, at about four fifths the distance to summit, while eight, increasing gradually in prominence, end abruptly at the rim of the summit ; these long ribs are cut on either side by grooves perpendicular to the surlace of the egg ; they are also frequently deflected somewhat from a direct line; color pale green. Duration of this stage about 4 days.