454 



NEW YORK STATE MUSEUM 



Comstock-Slingerland: Bull. 23 Cornell Agr. Expt. Stat., 1890, pp. 103-107, 

 figs. 1-4 (detailed account) . 



Lintner: in Count. Gent., lv, Oct., 1890, p. 781 (general account); 7th Rept. 



Ins. N. Y. for 1890, 1891, p. 365 (summary of preceding account); 

 in Insect Life, v, 1892, p. 105 (abundance in Eastern N. Y.); the 

 same, in 23d Ann. Rept. Ent. Soc. Ont., 1892, p. 40; also in 

 Canad. Entomol., xxiv, 1892, p. 207; in Count. Gent., lvii, 1892, 

 p. 504 (remedies); 9th Rept. Ins. N. Y. for 1892, 1893, p. 442 

 (reference to Count. Gent.); in Count. Gent., lix, 1894, p. 468 

 (general account) . 



French: Destr. Insects Victoria, 1891, Part 1, p. 119 (general account, col. 

 plate) . 



Riley-Howard: in Insect Life, iii, 1891, p. 308 (reference); in do., v, 1892, p. 1 

 (reference); in do., vii, 1894, p. 278 (on Pacific Coast). 



"Weed: Insects and Insecticides, 1891, p. 68 (general account). 



Fletcher: in Exper. Farms Repts. for 1891, 1892, pp. 198-200, figs. 5, 6 (gen- 

 eral account); in 24th Ann. Rept. Fruit-Growers Assoc. of Ont. 

 for 1892, 1893, p. 113; in Ann. Rept. for 1892, p. 146 (mention). 



Cobb: in Agr. Gazette N. So. Wales, iii, 1892, pp. 287, 288, fig. 11 (general 

 notice) . 



Slingerland: in Insect Life, v, 1892, p. 104 (general account); same in brief 

 in 23d Ann. Rept. Ent. Soc. Ont., 1892, p. 40; also in Can. Ent., 

 xxiv, 1892, p. 207; in Count. Gent., lvii, 1892, p. 629, c. 2 

 (remedy); in Bull. 61 Cornell Agricul. Expt. Stat., Dec, 1893, pp. 

 317-328, figs. 1-5; the same in 6th Ann. Rept. id. for 1893, 1894, 

 pp. 321-330, fig. 1-4 (life-history, remedy, bibliography, etc.); in 

 Canad. Entomol., xxvii, 1895, p. 330, in foot-note (Nalepa writes 

 Phytoptus pyri n . sp.). 



Smith: in Insect Life, v, 1892, p. 105 (remedies); the same in 23d Ann. Rept. 



Ent. Soc. Ont., 1892, p. 40; also in Canad. Entomol., xxiv, 1892, 

 p. 207). 



McCarthy: Bull. 92 N. Car. Agr. Expt. Stat., 1893, p. 99 (brief notice). 

 Bethune: in 23d Ann. Rept. Ent. Soc. Ont. for 1892, 1893, p. 9 (spread in 



Ontario and Maritime provinces) . 

 Ormerod: 17th Rept. Inj. Ins. for 1893, 1894, pp. 84-88 (general account); 18th 



Rept. id. for 1894, 1895, pp. 86-92 (general account). 

 Aldrich: in Insect Life, vii, 1894 p. 202 (in Idaho). 



Washburn: in Bull. 33 Oregon Agr. Expt. Stat., 1894, pp. 9-12, 2 figures 



(attack and remedies). 

 Comstocks: Man. Stud. Insects, 1895, pp. 44-45, figs. 52-54 (mite and galls 



illustrated). 



The injury caused to the leaves of pear-trees by this mite has long 

 been known to fruit-growers in this country, but its true cause was not 

 understood, until detected by Prof. Burrill, and, in 1882, recognized as 

 identical with the Phytoptus pyri of Europe. The nature of the attack 

 had been known for a number of years earlier, in Europe. 



