858 MEW YORK STATE MUSEUM 



193 Aulacaspis e 1 e g a n s Leon. xV greenhouse species 

 infesting Cycas 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 pergandil 

 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 

 Bouche\ 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. I T . S. dep't agric. Yearbook. '94. 

 p. 254-59; Felt, E. P. N. Y. state mus. Bui. 46. '01, p. 297 300. 



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. Bui. 46. '01. 

 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, '96. 

 p. 203. 



202 Hemichionaspis aspidistrae Sign. Infests 

 ferns in greenhouses. 



