REPORT OF THE ENTOMOLOGIST. 137 
(56) To 1 ounce of the arsenic solution of the preceding experiment was added 
half an ounce of nitric acid and 1 ounce of water; this was then added to one-fourh 
of an ounce of quicklime and one-sixth of an ounce of pure zinc. Confined it 
twenty minutes. Five-sixths of the leaves and two-thirds of the Iceryze were killed. 
(57) Added 1 ounce of nitric acid to 14 ounces of the arsenic solution of exper- 
iment, 55; this was then added to one-fourth of an ounce of quicklime and hali an 
ounce of mercury. Confined it twenty minutes. Residue light brown. Onlya 
few leaves and two-thirds of the Iceryz were killed. 
(58) Diluted 1 ounce of nitric acid with 1 ounce of water, and added this to one- 
fourth of an ounce of quicklime and one-fourth of an ounce of mercury. Confined 
it twenty minutes. No leaves nor Iceryze were kiiled. 
(59) Put one-seventh of an ounce of naphthaline in 1 ounce of alcohol and let it 
stand for two days. Diluted half an ounce of this solution with 1 ounce of water, 
and added it to half an ounce of quicklime; upon adding the water to the colorless 
alcoholic solution the latter turned milky white. Confined it twenty minutes. 
No leaves nor Iceryz were killed. 
(60) Dissolved half an ounce of arsenic in 6 ounces of muriatic acid. Added 2 
ounces of this solution to half an ounce of quicklime. Confined it twenty minutes. 
One-sixth of the leaves and nineteen-twentieths of the Iceryze were killed. 
(61) Added 2 ounces of the arsenic solution of the preceding experiment to half 
an ounce of quicklime and half an ounce of mercury. Confined it twenty minutes. 
One-third of the leaves were killed; found only two living iceryee. 
(62) Added 1 ounce of nitric acid to half an ounce of the naphthaline solution of 
experiment 59. Confined it twenty minutes. The residue was of a yellowish-green 
color, and had an oily appearance. All of the leaves were killed; found only one 
living Iceryee. 
(63) To the residue of the above was added three-fourths of an ounce of quick- 
lime. Confined it twenty minutes. One-sixth of the leaves were killed and a few 
of the Iceryee. 
A Same as in experiment 58. Leaves uninjured; only a few of the Iceryz were 
ed. 
(65) Added half an ounce of nitric acid to 14 ounces of the arsenic solution of ex- 
periment 60, then added this to one-fourth of an ounce of quicklime and the same 
quantity of mercury. Confined it twenty minutes. Residue brown. One-fourth 
of the leaves and four-fifths of the Iceryz were killed. 
(66) Added five-sixths of an ounce of the arsenic solution of experiment 60 to half 
an ounce of quicklime. Confined it twenty minutes. No leaves were killed; found 
only two living Icerye. 
(67) Added 14 ounces of bléaching powder to 1 ounce of methyl alchohol. Con- 
fined it twenty minutes. One-eighth of the leaves were killed; nearly all of the 
the on lower part of the tree but only avery few of those on the upper part were 
ed. e 
(68) To residue of above was added half an ounce of water and three-fourths of an 
ounce of quicklime. Confined ittwenty minutes. No leaves nor Icerye were killed. 
(69) Added three-fourths of an ounce of nitric acid to 1 ounce of methyl] alcohol. 
ae it twenty minutes. Residue dark brown. No leaves nor Iceryz were 
cilled. 
(70) To residue of above was added three-fourths of an ounce of quicklime. Con- 
fined it twenty minutes. No leaves nor Iceryze were killed. 
(71) Added three-fourths of an ounce of quicklime to 1 ounce of muriatic acid con- 
taining about one-fortieth of an ounce of the oil of tobacco. Confined it twenty 
minutes. No leaves nor Icerye were killed. 
(72) Added three-fourths of an ounce of quicklime to 1 ounce of water containing 
about one-fortieth of an ounce of the oil of tobacco. Confined it twenty minutes. 
No leaves nor Iceryz were killed. 
(73) Added three-fourths of an ounce of nitric acid to half an ounce of water con- 
taining about one-fortieth of an ounce of the oil of tobacco. Confined it twenty 
minutes. No leaves nor Iceryz were killed. 
(74) To residue of above was added three-fourths of an ounce of quicklime. Con- 
fined it twenty minutes. No leaves nor Icerye were killed. 
(75) Mixed “half an ounce of water with 1 ounce of carbon bisulphide, and 
added itto three-fourths of an ounce of quicklime. Confined it twenty minutes. 
Leaves uninjured; only a few Icerye were killed. 2 
(76) Added three-fourths of an ounce of nitric acid to 1 ounce of carbon_bisul- 
phide. Confined it twenty minutes. Leaves uninjured; only a few of the Iceryx 
were killed. 
(77) To residue of above was added three-fourths of an ounce of quicklime. Con- 
fined it twenty minutes. One-eighth of the leaves were killed; found only one 
living Icerya. om 
