PLAXTS — IXSECTICIDAL PROPERTIES. 27 
Annona squamosa L. Sugar-apple. Tropical America. 
Greshoff (31, p. 11), quoting Hartwich. says that the seeds are 
used against head lice, and Lyons (53, p. 41) says that they are used 
as a parasiticide. 
Anthemis arvensis L. Asteraceae. Corn camomile. Europe, naturalized in 
the United States. 
Kalbruner (47) says that the flowers were entirely inactive against 
flies. 
Greshoff (33. p. 157) reports that the odor drives away mice and 
insects. 
Anthemis cota L. Italy. 
Passerini (66, p. 1$) determined that the flower heads killed the 
dog flea, although very slowly, but had no practical effect on flies 
and ants. 
Anthemis cotula L. Synonym: Maruta cotula DC. Mayweed. Europe, natu- 
ralized in the United States. 
Garrigues (25) reports that a decoction of the leaves is said to 
destroy all species of insects. 
The powdered flower heads (3) were very effective against bed- 
bugs, fleas, and flies, but ineffective against grain worms and other 
caterpillars. 
Kalbruner (47) says that the flowers were entirely inactive against 
flies. 
Anthemis nobilis L. Synonym: Chnmomilla nobilis Godr. Common camo- 
mile. Europe, cultivated and adventive in the United States. 
Gieseler (26) reports that the flower heads have an action on in- 
sects similar to that of insect powder. 
Kalbruner (47) says that they were entirely inactive against flies. 
Cook and Hutchison (18, p. 4) found them ineffective against fly 
larva?. 
Anthemis tinctoria L. Yellow camomile. Europe, Asia. 
Kalbruner (47) says that the flowers were entirely inactive against 
flies, and Passerini (66. p. 42) found them of no practical use against 
flies and ants, but they did kill the dog flea slowly. 
Anthemis sp. 
Howard (44i V- ^)* quoting Cruz of Rio de Janeiro, says that 
camomile, used as a fumigant in rooms in which yellow-fever pa- 
tients are confined, is absolutely efficient against mosquitoes (.1 
calopnis). 
Arisaema dracontium (L.) Schott. Araceae. Synonym: Arum dracont turn L. 
Indian turnip. Dragonroot. Canada and eastern United States. 
Pammel (64. p. 103) says that the corm of the Indian turnip is 
somewhat acid and is used to kill insects. 
Arisaema japonicum Blume. Japan. 
Greshoff (33. p. 19) reports that the roots are used in Japan as 
an insecticide. 
