Varshney, R.K., & Ganguly, G. 1972 Studies on the Malpighian tubes of the lac insect, Kerria lacca (Kerr) [Homoptera: Tachardiidae] and their relation with lac-dye.. Journal of the Zoological Society of India 24(2): 195-201.

Notes: Specimens collected from Ficus carica, F. religiosa, Cajanus cajan and Moghania macrophylla; chromatographic analysis showed a positive relationship between the agueous solution of lac-dye and the malpighian tubes; however, the dye is not excreted out but stored in the tubes, as the honeydew drops are colorless.