304 NEW YORK STATE MUSEUM 



Remedies. The recommendations for controlling this insect are the 

 same as those advised for the preceding form, to which the reader is 



referred. 



Bibliography 



Fitch, Asa. N. Y. state agric. soc. Trans. 1856, 16:352-53 (orig- 

 inal description as A s p i d i o t u s fur fur us); Noxious, beneficial and 

 other insects of New York. 3d-5th rep'ts. 1859. p. 34-35 ^ 54. 



Walsh, B. D. III. state hortic. soc. Trans. 1868. Separate as rep't 

 of acting state ent. p. 53-55 (general account). 



Comstock, J. H. U S. dep't agric. Rep't of ent. 1880. p. 315-16 

 (synonymy and description). 



Osborn, Herbert. Entomological notes for the year 1882. la. 

 state hortic. soc. Trans. 1882. 1883. p. 291-92 (brief general account), 



Howard, L. O. U. S. dep't agric. Yearbook. 1894, p. 259-61 

 (general account). 



Cooley, R. A. Coccid genera Chionaspis and Hemichion- 

 aspis. Mass. agric. expt. sta. Special bul. Aug. 10, 1899. p. 23-29 

 (synonymy, bibliography and general account). 



King, G. B. A new variety of Chionaspis furfura Fitch and 

 notes on other species. Psyche. 1899. 8 : 334-36 (a variety described, 

 food plants and distribution given). 



Cockerell, T. D. A. Note on the pigments of the coccid, Chion- 

 aspis furfura Fitch. Science. Ap. 27, 1900. 11:671 (note on 

 color and changes obtained by potassium hydrate). 



Lochhead, William. San Jos6 and other scale insects. Ont, 

 dep't agric. Toronto. 1900. p. 42-43 (brief notice). 



Pernicious or San Jose scale insect 



Aspidiotus peniiciosus Comstock 



PLATE 3 



This insect is known by hearsay, at least, to almost every fruit-grower 

 and farmer in the eastern United States. It has recently become estab- 

 lished in a number of widely separated locaHties in New York state, and 

 is now the object of considerable anxiety to both horticulturists and 

 nurserymen. This pest is very destructive in some of the more southern 

 states, and even in New York, when allowed to increase without restric- 

 tion, it causes considerable damage. Its ability to inflict so much injury 



