19 



WHITE FLY; MEALY WING. 



Aleyrodes citri R. & H. 



For general articles see Marlatt, Farmers' Bui. 172, U. S. Dept. 

 Agric, pp. 36-38, 1903; also Ins. Life, v. V, pp. 219-226, 1893. 

 Exhibit: Adult, work, and figure. 



INSECTS INJURIOUS TO APPLE. 



For special treatises on apple insects see Bruner, Trans. Nebr. St. 

 Hort. Soc. f. 1894, pp. 155-223, 1895; Harvey and Munson, Bui. 56, 

 Maine Agr. Expt. Sta., 1899; Saunders, Insects Injurious to Fruits, 

 2d ed., pp. 13-139, 1900. 



INJURING THE ROOTS. 



THE WOOLLY APPLE APHIS. 



Schizoneura lanigera Hausm. 



For general account see Marlatt, Cir. 20, Div. Ent., U. S. Dept. 

 Agric, 1897. 



Exhibit: Work, figure, parasite, ApheUnus mali Hal. ; and enemy 



Scyjnnus cervicalis Muls. 



INJURING THE TRUNK. 



FLAT-HEADED APPLE-TREE BORER. 



Chrysobothris femorata Fab. 



For general account see Chittenden, Cir. 32, Div. Ent., U. S. Dept. 

 Agric, pp. 9-12, 1898. 



Exhibit: Adult, work, and figure. 



ROUND-HEADED APPLE-TREE BORER. 



Saperda Candida Fab. 



For general account see Chittenden, Cir. 32, Div. Ent., IT. S. Dept. 

 Agric, pp. 1-8,1898. 



Exhibit: Adult, work, and figure. 



APPLE- WOOD STAINER; PIN-BORER. 



Pterocyclon mali Fitch. 



(Formerly Monarthrum.) 



For general account of this and an allied species, M. fasciaium, see 

 Hubbard, Bui. 7, n. s., Div. Ent., U. S. Dept. Agric, pp. 26-28, 

 1897. 



Exhibit: Adult and figure. 



