31 



INSECTS INJURIOUS TO PEAR. 



(Many of the insects injuring the apple will be found attacking the 

 pear. ) 



THE FRUIT-TREE BARK-BEETLE. 



Scolytus rugulosus Ratz. 

 For general account see Chittenden, Cir. 29, Div. Ent., U. S. 

 Dept. Agric, 1898. 



Exhibit: Ad nit, work, and figure. 



PEAR-BLIGHT BEETLE; SHOT-BORER. 



Xyleborus pyri Peck. 

 (Formerly X. dispar.) 



For general account see Hubbard, Bui. 7, n. s., Div. Ent., U. S= 

 Dept. Agric, pp. 22-23, 1897. 



Exhibit: Adult, work, and figure. 



THE PEAR BLISTER MITE. 



JEriophyes pyri Pagenst. 



For detailed account see Slingerland, Bui. 61, Cornell Univ. Agr. 

 Exp. Sta., pp. 317-328, figs., 1893. 

 Exhibit: Work and figure. 



THE PEAR PSYLLA. 



Psylla pyri Linn. 



For general accounts see Slingerland, Bui. 44, Cornell Univ. Agr. 

 Sta., 1892;*Marlatt, Cir. 7, Div. Ent., U. S. Dept, Agric, 1895. 

 Exhibit: Adult and figure. 



THE PEAR SLUG. 



Eriocampoides limacina Ratz. 



(Formerly Eriocampa cerasi.) 



For general account see Marlatt, Cir. 28, Div. Ent., U. S. Dept. 

 Agric, 1897. 



Exhibit: Adult, work, and figure. 



THE SCURFY BARK-LOUSE. 



Chionaspis fur fur a Fitch. 



(Food-plants: Apple, cherry, currant, elm, pear, etc See under 

 "More important scale insects. 1 ') 



For bibliography and food plants see Fernald, Cat. Coccidae of 

 World, Bui. 88, Mass. Agr. Coll., pp. 217-219, 1903; Howard, Year- 

 book, U. S. Dept. Agric, 1894, pp. 259-261, figs.; Banks, Bui. 34, 

 Div., Ent., U. S. Dept. Agric, p.' 14, 1902. 



Exhibit: Infested twig-. 



