-107- 
TROPAEOLUM MAJUS L. Common nasturtium. 
This plant was reported to have some insecticidal value and was 
plant e/1 around apple trees to rid them of woolly apple aphids.— 
Von Mueller (414 , p. 643).. 
Extracts were not repellent to the Japanese beetle.- Metzger and 
Grant (277). 
GINKGO ACEAE 
(Ginkgo Family) 
GINKGO BILOBA L. Synonym* Salisburia adiantifolia Smith. 
Maidenhair tree. Ginkgo tree. 
Extracts were not repellent to the Japanese beetle.— Metzger and 
Grant (277). 
Extracts of the leaves killed none of the mosquito larvae tested.— 
Hart z ell and Wilcoxon ( 188 ) • 
GNETACEAE 
( Joint-Fir Family) 
EPHEDRA A1TISSIMA Desf. 
EPHEDRA PROCERA C. A. Mey. 
EPHEDRA sp. 
Extracts of the stalks of the first species killed only 5 percent 
of the mosquito larvae tested, but extracts of the other species killed 
none • --Hart z ell and Wilooxon (188) . 
HABMODORACEAB 
(Bloodwort Family) 
LACHNANTHBS TINCTORIA (Walt.) Ell. Synonym! Gyrotheoa tinotoria 
(Walt.) Salisb. Redroot. 
Full-strength extracts from the entire plant were repellent to the 
Japanese beetle.— Metzger and Grant (277) . 
HAMAMELIDACEAB 
(Witoh-Hazel Family) 
HAMAMELIS VIRGINIANA L. Common witch-hazel. 
UqUIDAMBAR STYRACIFLUA L. Sweet gum. 
Extracts from these plants were not repellent to the Japanese 
beetle,— Met zger and Grant (277) • 
