858 NEW YORK STATE MUSERUM 
198 Aulacaspis elegans Leon. A greenhouse species 
infesting Cyca s revoluta , frequently called sago palm. 
194 Rose scale insect, Aulacaspis rosae Sandb. Prin- 
cipal food plants: rose, blackberry, raspberry bushes. 
Treatment: Spray infested plants with kerosene emulsion or 
whale oil soap solution. 
195 Orange chaff scale insect, Parlatoria pergandii 
Comst. Chief food plants: orange, tangerine. 
It is limited to greenhouses in the north. 
196 Orange scale insect, Mytilaspis citricola Pack. 
Occurs on oranges in the south and may infest trees kept in 
greenhouses in the north. 
197 Appletree bark louse, Mytilaspis pomorum. 
Bouché. Principal food plants: apple and many other trees. 
Treatment: Spray young about June 1 with kerosene emul- 
sion or whale oil soap solution. 
Chief accessible articles: Lintner, J. A., state ent. 4th rep’t, 
88. p. 114-20; Howard, L. 0. U. S. dep’t agric. Yearbook. 94. 
p. 254-59; Felt, E. P. N. Y. state mus. Bul. 46. 701. p. 297300. 
198 Elm Chionaspis, Chionaspis americana Johns. 
Rather common on American elm, rarely very injurious. | 
199 Euonymus scale insect, Chionaspis euonymi 
Comst. Principal food plant: Euonymus or strawberry tree. 
200 Scurfy bark louse, Chionaspis furfura Fitch. 
Principal food plant: apple and other fruit trees. 
Treatment: Spray young about June 1 with kerosene emul- 
Sion or whale oil soap solution. 
Chief accessible articles: Howard, L. 0. U.S. dep’t agric. Year- 
book. ’94. p. 259-61; Felt, E. P. N. Y. state mus.- Bul. 46. 701. 
p. 300-4. 
' 201 Pine leaf scale insect, Chionaspis pinifoliae 
Fitch. Attacks various pines, specially those growing in parks.. 
Chief accessible notice: Lintner, J. A., state ent. 11th rep’t, 796. 
p. 203. 
202 Hemichionaspis aspidistrae Sion. Infests 
ferns in greenhouses. | 
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