50 BULLETIN 1201, U. S. DEPARTMENT OE AGRICULTURE. 



Solanuni tuberosum L. Potato. 



Gillette (27, p. 185) rubbed concentrated potato water on cattle 

 and found that it acted slowly, but eventually it rid the animals 

 of lice. 



Scott, Abbott, and Dudley (83, p. 14) found potato starch ineffec- 

 tive against roaches. 



Sophora flavescens Ait. Fabaceae. Siberia. 



Greshoff (33, p. 65) reports that a decoction of the stems and 

 leaves is used in Japan as an insecticide. 



Sophora griffithii Stocks. Synonym : Keyserlingia grifflthii Boiss. 



Greshoff (33, p. 65) quotes : " The seed used powdered and mixed 

 with oil kill lice in the hair." 



Stipa viridula Trin. Poaceae. Sleepy grass. 

 The writers' results are given on page 23. 



Suma rubra. ( See footnote on page 26. ) 

 The writers' results are given on page 23. 



Synandrospadix verniitoxicus Engl. Aeaceae. Argentina. 



Greshoff -*(31, p. 158) reports that the poisonous bulbs serve for the 

 destruction of injurious insects. 



Tagetes minuta L. Asteeaceae. Synonym : T. glandulifera Schrank. South 

 America. 



Von Mueller (91, p. 522) says: " This vigorous annual plant is said 

 by Doctor Prentice to be pulicifugous." 



Tamus communis L. Dioscoeeaceae. Black-bryony. Europe. 



Greshoff (31, p. 152) reports that the powdered root has been rec- 

 ommended to destroy lice in children's hair. 



Tanacetum vulgare L. Asteeaceae. Common tansy. Europe and northern 

 Asia, cultivated and naturalized in the United States. 



Gieseler (26) reports that the heads exert an effect on insects simi- 

 lar to that of pyrethrum. 



Kalbruner (%7) determined that the flowers of this species were 

 very feebly benumbing to flies. 



Riley (71, p. 186) says that an alcoholic extract and an infusion 

 had no effect on cotton caterpillars. 



Martindale (see Kirby, 48 ■> p- %41) states that an action similar to 

 that of Persian insect powder is produced by the common tansy, 

 which is sold in the north of England for similar purposes. 



Simmonds (84, p. 202) states that the flowers of tansy are said 

 to have a stupefying effect on insects. 



Devin (21, p. 36) says that he has heard it reported that a clump 

 of tansies, growing about the base of the tree, gives perfect immunity 

 against the plum curculio, but Slingerland (85, p. 196) says that 

 tansy plants, grown near peach trees, have only a very slight effect 

 on the peach-tree borer. 



