162 NEW YORK STATE MUSEUM 



Katydid Eggs (Country Gentleman, Nov. 14, 1901, 66:922") 

 Identifies and describes the oviposition of Microcentrum retinervis 



Burm. 



Scale Insects of Importance and List of the Species in New York 

 State (N. Y. State Mus. Bui. 46. June 1901 [issued Nov. 15]. 

 94p., 15 plates [seven colored]) 



Contents page 



Introduction 291 



Characteristics 291 



Number of species 292 



Injuries 293 



Means of dispersal 293 



Certain species of value 294 



Recognition of scale insects 295 



Key based on superficial characters of species treated 295 



Appletree bark louse, Mytilaspis pomorum Bouche' 297 



Scurfy bark louse, Chionaspis furfura Fitch 300 



Pernicious or San Jose scale insect, Aspidiotus perniciosus Comst. . 304 



European fruit scale insect, Aspidiotus ostreaeformis Curt 323 



Putnam's scale insect, A s p i d i o t u s ^a n c y 1 u s Putn 326 



Cherry scale insect, Aspidiotus forbesi Johns 330 



White scale insect of the ivy, Aspidiotus hederae Vallot 333 



Remedial measures 336 



Only contact insecticides of value 336 



Whale oil soap 336 



Whale oil soap and crude petroleum combination 337 



Crude petroleum emulsion 337 



Crude petroleum undiluted 338 



Kerosene 339 



Kerosene emulsion 339 



Other summer sprays 339 



Fumigation in orchards 339 



Fumigation of nursery stock 341 



Technical study of four species of A s p i d i o t u s, by Miss M. F. Boynton . 343 



Preface 343 



Key 347 



Aspidiotus forbesi 347 



Aspidiotus perniciosus 349 



Aspidiotus ancylus 351 



Aspidiotus ostreaeformis 352 



Scale insects, Coccidae, in New York state 354 



Explanation of plates 361 



Index 367 



San Job6 Scale (Worcester [Mass.] Sunday Telegram, Nov. 17, 

 1901, p.7) 

 Summary account of Aspidiotus perniciosus Comst. 



'A general account and bibliography of each is Riven. 



