PLANTS — INSECTICIDAL PROPERTIES. 39 
Heliotropium indicum L. Borraginaceae. India heliotrope. Tropical re- 
gions. 
Riley (71, p. 186) reports that a decoction had no effect on cotton 
caterpillars. 
Helleborus niger L. Ranunculaceae. Black hellebore. Europe. 
Cook and Hutchison (18, p> 4) found the powdered roots of H. 
niger inefficient against fly larvse. 
Hicoria glabra (Mill.) Britton. Juglandaceae. Synonyms: Juglans f/labra 
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. Malpighiaceae. 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. Ettphorbiaceae. Sandboxtree. Tropical America. 
The writers' results are given on page 8. 
Hyndocarpus anthelminthica Pierre. Blxaceae. 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. Pabaceae. 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 larvse. 
Indigofera tinctoria L. Fabaceae. Synonym: /. iiidica 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. Asteraceae. Synonyms: I. squamosa Bernh., Conysa squar- 
rosa L. Cinnamon-root. Europe. 
Lyons (53, p. 246) lists it as an insecticide. 
