Extracts of two letters from Mr. Martin Lister to the publisher, of June 14. 1671. and July 5. 1671. concerning kind of insect, hatched of the english kermes, formerly taken notice of and described by the same in numb. 71. p. 2164; as also the use of these purple insect: husks for tinging, together with a comparison made of this english purple-kermes with the Scarlet-kermes of the shops