Ovisac formed of thickly felted creamy-white to buff-white secretion ; dorsum highly convex longitudinally and slightly so transversely, with a series of 11 longitudinal and crenulated keels or ridges, of which the lateral ones are very broad and flange-like and arise from points on the body of the female considerably nearer the middle line than any of the others ; sides vertical, with two or three curved or concentric keels similar to those on the dorsum, but there are also small transverse intervening lines which give the sides of the ovisac a distinctly conchoidal appearance ; interior of ovisac smooth. Length, 6·50 to 8·50 mm. ; height, 6 to 7·50 mm. ; width, 6 to 7·25 mm. Old adult female tilted as in Pulvinaria so that the front, which is distinctly produced, is the only portion attached to the food-plant. In some instances the position of the body is almost vertical, and in one example the anal portion projects actually slightly in front of the cephalic margin. Dorsum with a median elongated patch of opaque glassy secretion, the rest nude and dark brown in colour.