PLANTS — USTSECTICIDAL PROPERTIES. 39 



Heliotropiuni indicum L. Boeraginaceae. India heliotrope. Tropical re- 

 gions. 



Riley (71, p. 186) reports that a decoction had no effect on cotton 

 caterpillars. 



Helleborus niger L. Ranunctjlaceae. Black hellebore. Europe. 



Cook and Hutchison (18, p. 4) found the powdered roots of H. 

 niger inefficient against fly larva?. 



Hicoria glabra (Mill.) Britton. Jttglandaceae. Synonyms: Juglans glabra 

 Mill., Carya porcina Nutt, C. glabra Spach. Pignut. Eastern United States. 



Williams (94, p. 920) says: "An infusion of the leaves in water 

 and washing a horse with them in fly time prevents the annoyance of 

 those insects." 



Hiptage madablota Gaertn. Maxpighiaceae. Tropical Asia. 

 Greshoff (33, p. 84) lists this as an insecticide. 



Honduras fish-poison. (See footnote on page 26.) 

 The writers' results are given on page 22. 



Hura crepitans L. Etjphokbiaceae. Sandboxtree. Tropical America. 

 The writers' results are given on page 8. 



Hyndocarpus anthelminthica Pierre. Bixaceae. Tropical Asia. 



Greshoff (33, p. 112) reports that the seeds are used as an insecti- 

 cide. 



Hyoscyamus niger L. Solanaceae. Henbane. Southern Europe, sparingly 

 naturalized in the United States. 



Sprenger (88) recommends decoctions of three species (niger, 

 albus, and major) as insecticides. 



Schreiber (81) found a strong decoction of henbane effective 

 against aphids only. 



Goriainov (29) found a decoction of henbane inefficient against 

 two species of caterpillars and efficient against one species. 



Ichthyomethia piscipula (L.) Hitchc. Fabaceae. Synonyms: Piscidia ery- 

 thrina L., P. piscipula Sarg. Jamaica fish-poison. Jamaica dogwood. Ja- 

 maica. 



Cook and Hutchison (18, p. 4) found that the powdered bark had 

 considerable effect against fly larva?. 



Indigofera tinctoria L. Fabaceae. Synonym : /. indica Lam. True indigo. 



Tropical countries. 



Porcher (68, p. 205) says: " In Jamaica, it is employed to destroy 

 vermin." 



Greshoff (31, p. 52) reports that the seeds yield a tincture which 

 is used to destroy lice. 



Inula conyza DC. Asteeaceae. Synonyms : /. squarrosa Bernh., Conyza squar- 

 rosa L. Cinnamon-root. Europe. 



Lyons (53, p. 246) lists it as an insecticide. 



