This section is from the book "Materia Medica And Therapeutics: An Introduction to the National Treatment of Disease", by John Mitchell Bruce. Also available from Amazon: The pharmacology and therapeutics of the materia medica.
Coccus-Cochineal.-The dried female insect, Coccus Cacti. Reared in Mexico and Teneriffe.
Characters.-Ovate, plano-convex, about two lines long, wrinkled, black or greyish-white; yields, when crushed, a puce-coloured powder. The greyish-white insect quickly becomes black when warmed before the fire.
Impurities.-Inferior Cochineal is "faced" with various white or black powders to improve its appearance. It resembles Kino, which has an astringent taste.
Preparations. Tinctura Cocci.-1 in 8.-Dose, 1/2 to 1 1/2 fl.dr.
Coccus is also an ingredient of Tinctura Cardamomi Composita, (60 gr. to 1 pint); and Tinctura Cinchonas Composita, (30 gr. to 1 pint).
Cochineal is used as a colouring material only.