3l6 'new YORK STATE MUSEUM 



in early spring with whale oil soap, mechanical petroleum emulsion or 



with hydrocyanic acid gas, the latter being the most efficient. 



Remedial measures. These will be considered in detail under a 



separate head, special attention being given to the pernicious, or San 



Jose scale. 



Bibliography 



This scale insect has attracted more attention than any other injurious 

 insect; and in these days of easy and rapid publication the notices 

 regarding it have accumulated at a remarkable rate. The attention of 

 the student is called particularly to the accounts and bibliographies by 

 Dr Lintner, Dr Howard and his associate, Dr Marlatt, to which the 

 appended bibliography is largely supplemental. A few of the most 

 important notices cited by the above named writers have been repeated, 

 and special attention has been given to the more important articles con- 

 cerning this insect in New York state. No attempt has been made to 

 include a mass of minor* notices relating to this pest in other parts of the 

 country or in other countries. 



Comstock, J. H. U. S. dep't agric. Rep't of ent. 1880. 1881. 

 P- 304-5 (original description). 



Lintner, J. A. San Jose scale, As p idi o tu s perniciosus 

 and some other destructive scale insects of the state of New York. N.Y. 

 state mus. Bui. 13. 1895. v. 3. p. 263-320 (general account of the scale 

 with brief notices of other destructive species) ; Injurious and other in- 

 sects of the state of New York. nth rep't, 1895. 1896. p. 200-33, 

 pi. 9-14 (the preceding reprinted v/ith bibliography brought down to 



date); 12th rep't. 1896. p. 316 (infested locaHties) ; San Jose 



scale. Country gentleman. July 8, 1897. 62: 533 (general article). 



\\ Howard, L. O. & Marlatt, C. L. San Jose scale. U. S. dep't 

 agric. div. ent. Bui. 3, n. s. 1896. p. 1-80. i pi. (a very full account 



of the insect) ; Original home of the San Jose scale. Bui. 20, 



n. s. 1899. p. 36-39 (a critical examination of the evidence respecting 

 its origin). 



Marlatt, C. L. Insect control in California. U. S. dep't agric. 

 Yearbook. 1896. p. 221-22 (parasites and resin wash); Temperature 



control of scale insects. Bui. 20, n. s. 1899. p. 73-76 (effects 



of cold on various species); How to control the San Jose scale. 

 Circular 42. 2d ser. 1900. p, 1-6 (brief synopsis of remedies). 



Alwood, W. B. Inspection and remedial treatment of San Jos6 

 scale. Va. agric. expt. sta. Bui. 79. 1897. p. 73-94 (account, of 



