20 BULLETIN 824, U. S. DEPARTMENT OF AGRICULTURE. 



SUMMARY. 



Substances that have been used to color or adulterate insec 

 powder may be classified as follows : 



To give color: 



Lead chromate. 



Barium chromate. 



Potassium chromate. 



Cxircuma (turmeric, the root of Curcuma longa L.). 



Fustic (wood of Chlorophora tinctoria L.). 



Saffron (dried stigmas and tops of the styles of Crocus sativum L.). 



Yellow ocher. 

 Other species of flowers: 



Pyrethrum corymbosum W. 



Pyrethrum tenuifolium Tenore. 



Pyrethrum indicum. 



Chrysanthemum, segetum. 



Hungarian daisy, Russian daisy, ox eye daisy (Chrysanthem^um, leucanthemuni). 



Garden daisy (flowers of Bellis perennis L.). 



German chamomile (dried flower heads of Matricaria chamoviilla L.). 



Roman chamomile (dried flower heads of Anthemis nobilis L.). 



Corn chamomile (Anthemis arvensis L.). 



Mayweed (Anthemis cotula L.). 



Feverfew (Matricaria parthenium, L. Synonyms: Chrysanthemuvi parthenium (L. 

 Pers. ; Pyrethrum parthenium Sm.). 



Croton flavens. 



Tansy (leaves and tops of Tanacetum vulgare L.). 



Calendula, marigold (dried ligulate florets of Calendula officinalis L.). 



Yellow cat's paw, hourglass weed, yellow-moth weed (Helichrysum arenariur, 

 DC. Flores Stsechadis citrinas). 



"Margherita silvatica" (Chrysanthemum frutescens). 



Chrysanthemum coronarium. 



Inula pulicaria. 



Chrysanthemum pallens ("false insect flowers"). 



Chrysanthemum inodorum. 



Anthemis tinctoria. 



Helichrysum italicum. 



Anthemis cotula. 



Spartium junceum. 

 Miscellaneous adulterants: 



Almond shells. 



Aloes (inspissated juice of leaves of various species of aloes). 



Arsenic. 



Borax. 



Brick dust. 



Chrome alum. 



"Cockle of Levant." 



Euphorbium (gum-resin from Euphorhium resinifera Berg.). 



Fleabane, horseweed (leaves and tops of Erigeron canadensis L.). 



Hellebore (powdered root of Veratrum album). 



Jalap (dried tuberous root of Exogonium pxirga (Wend.) Benth.). 



Nux vomica (dried, ripe seed of Strychnos nux vomica L.). 



