Oil of lemon — Continued. 
special test on reaction of Corn-Field 
Ant to, 22, 23. 
of sassafras, effect of, on germination of 
feed-corn tested, 8, 9. 
of wintergreen, effect of, on germination 
of seed-corn tested, 8, ^'. 
Ormerod, E. A., 46. 
Osborn, Herbert, 6_', 64, 65, 97. 
Osborne, J. A., 89. 
Oxcye Daisy as food plain of Clover Stem- 
borer, 107. 
Patbyiieiiron syrijhi. 73. 
bred from puparia of AHograpta obliqua 
apparently parasitized by I'.assus Iseto- 
torius, 76, SO. 
panicola, Schizoneura. 38, 39. 
Parasites or other enemies: 
of ^Vllograpta obliqua, 76. 
of Bassus la;totorius, 76, 80. 
of Chrysopa eggs and cocoons. 78. 
of Clover Callipterus, 106. 
of Clover Leaf-midge, 102-103. 
of Clover Leaf-weevil, 90-91. 
of Clover Root-borer, 95. 
of Clover Seed-caterpillar. 66. 
of Clover Seed-chalcid, 59-60. 
of Clover Seed-midge, SO, 51. 
of Clover Stem-borer, 111. 
of Coccinella 9-notata, 74. 
of coccinellid pupse. 75. 
of eggs of pentatomids, 75, 77. 
of Megilla maculata. 74, 80. 
of Pea- or Clover- louse, 72-80, 82. 
of scale insects, 74. 
of Syrphus ribesii, 76. 
parenthesis, Ilippodamia, 73, 74. 
parvus, Rhyncholophus, 73, 79. 
Pea-louse, or Clover-louse, 66-82. 
control of, 81-82. 
descriptions of different forms of, 68-69. 
distribution of, 66. 
food plants of and injury by, 66-68. 
generic names of, 68. 
liabits of, 71-72. 
insects directly or indirectly affecting, 
73, 80. 
life history of, 69-71, 72. 
literature on, cited, 82. 
natural agencies effective against, 82. 
enemies of: 
parasitic, 79-82. 
predaceous, 72-79. 
rank of, as a pest, 66. 
reproduction of, 72. 
tabular exhibit of data on successive 
generations of, 70. 
on molting intervals of, 71. 
Pea, Sweet, as food plant of Pea- or Clover- 
louse, 67. 
Peas as food plants of Pea- or Clover- louse, 
42, 67. 
of Clover Root-borer, 42, 93. 
ej.rly, practically exempt from injury by Pea- 
or Clover- louse. 81. 
field, damage to by Pea- or Clover- louse, 
66, 67. 
flowerir.g sweet, measure to protect against 
Pea- or Clover- louse, 81. 
garden, measure to protect against same, 81. 
Pentalomid.x as enemies of Pea- or Clover- 
louse, 73. 79. 
Pergande, Thco., 68. 
Perilitus aniericanus, 73. 
as jiarasite of ladybirds. 74. 7.^. 
dates of emergence of adult. 74. 
Pettit. R. IF.. 54. 118, 119. 121. 
Phanerotoma tibialis as parasite of Clover 
Seed-caterpillar, 65. 
philadelphicus, Erigeron, 107. 
Plileum pratense as food plant of Clover Stem- 
borer. 107. 
Pbytonomus punctatus, 83-92. 
characters distinguishing, from other spe- 
cies of its genus, 86. 
(See also Clover Leaf-weevil.) 
Pinkerton, Charlotte M.. 41. 
pisi, Macrosiphum, 66, 103, 105. 
Plant-lice as food of Coccinellid.-c, 74. 
Platychirus quadratus, 73. 
presumptive enemy of Pea- or Clover- 
louse, 76. 
Platygasteridje, 50. 
plorabunda, Chrysopa, 73, 77. 78. 
Plowing clover field soon after removal of 
hay badly infested with Clover Root- 
borer, 95. 
seeds under to destroy Clover Seed-chal- 
cid in hibernation, 60. 
under after second season to get rid of 
Clover Leaf-weevil, 92. 
in spring when Clover Root-borer is very 
destructive, 45. 
when Pea- or Clover- louse is abun- 
dant, 81. 
old clover field under in fall or early spring, 
then harrowing and rolling, as remedy for 
Clover .Seed-caterpillar, 65. 
soon after removal of clover hay crop, 95. 
Poa annua as food plant of Clover Sitones in 
Europe, 113. 
Podabrus rugulosus as enemy of Pea- or Clo- 
ver- louse, 73, 79. 
podisi, Telenomus, 77. 
Podisus maculiventris as enemy of Pea- or 
Clover- louse, 79. 
attacking syrphid larvae, 77. 
preying upon coccinellid pupae, 75. 
spinosus, 73, 75, 77. 
politum, Mesogramma, 73, 76. 
Pollen grains and spores as food of Cocci- 
ncllida:, 74. 
