22 BULLETIN L201, V. S. DEPARTMENT OF AGRICULTURE. 
A water extract from the dried loaves and seeds of the American 
wormseed (Chenopodium ambrosioides) had no effect on bees. A 
strong decoction, mixed with soap, from the leaves, stems, and 
had no effect on potato aphids and nasturtium aphids. The powder, 
used as a dust, had no effect on tent caterpillars, but a considerable 
effect on roadies: and used as a stomach poison, it had no effect on 
grasshoppers. 
The powder and hot-water extract from the flower heads of the 
oxeye daisy {Chrysanthemum leuccmthemum) had no effect on silk- 
worms, webworms, potato-beetle larva), and rose aphids. 
The powder from Clibadium surinamense had practically no effect 
on silkworms. 
A hot-water extract of the stems of a fish-poison (Oracca viUosa 
purpurea) had no effect on tent caterpillars. 
Cold-water extracts from the tops of Scotch broom (Cytisus scopa- 
rius), collected in two different localities, had practically no effect 
on silk worms. Since this plant is reported to contain sparteine, a 
').;» per cent solution of sparteine sulphate was fed to silkworms. 
This solution proved efficient, but acted very slowly. 
A water extract of jimsonweed (Datura stramonium) had no 
effect against small webworms and small catalpa caterpillars, and a 
highly concentrated water extract had only a slight effect on bees. 
The water extract, used as a fumigant, had no effect on small web- 
worms. The powder, used as a stomach poison, had a slight effect on 
silkworms; and used as a dust, it had a slight effect on roaches and 
tent caterpillars. 
Powders from the roots, leaves, and stems, and from the blossoms 
of low larkspur (Delphinium bicolor), and hot-water extracts from 
all of these powders had no effect on webworms, silkworms, grasshop- 
pers, and potato-beetle larva?, with one exception: the extract from 
the blossoms had a slight effect on silkworms. 
A water extract from Euphorbia cotinoides had a considerable 
effect on silkworms. 
A water extract from Furcraea cubensis had practically no effect 
on silkworms. 
A powder and a decoction from galinsoga (Galinsoga parr', flora) 
had no effect on the aphids (M acrosiphum sp. B) tested. 
The juice from the green leaves of the Kentucky coffeetree (Gym- 
nocladus dioica), mixed separately with sugar sirup, molasses, and 
honey, had no apparent effect on the many flies tested. 
The powder from the heads of the bitterweed (Helenium tenuifo- 
lium) had only a very slight effect on silkworms, flies, and aphids 
(Aphis sp]). .1 and §), but the decoction had no effect whatever 
on aphids of the same species. 
A water extract from a Honduras fish-poison (see footnote on p. 
26) was efficient against silkworms. 
A powder from J<iiro/>li<i macrorhiza % used as a dust, had a slight 
effect on tent caterpillars and roaches. 
The powder from lambkill (Kalmia angustifolia) , eaten by grass- 
hopper.^ and dusted upon bees, had no effect. 
The powder and a. water extract from margarita (Karwinskia 
humbolatiana) were efficient but very slow against silkworms, 
although they had no effect on tulip-tree aphids. The powder had 
