83 



OYSTER-SHELL BARK-LOUSE. 



Lijii(liis<i/)lii s iiliiii I.iiiii. 



(Attacks priiicipHlly apple curniiit, Cornus, c-ottonwood, lilac, pear, 

 sassafras, «>tc. ; t'oniierly t-allod J////'/A/.sy>/.s' in)inor<iin B(nich('. See 

 uiulcr "More important scale insects.") 



For hiblioo-raphy and food plants see Fernald, Cat. Coccida' of 

 World, l^ul. 88, Mass. Agr. Coll., pp. 314-317, 1903. 



Exhihit: Infested twit;. 



THE SCURFY BARK-LOUSE. 



Chionaspis furfura Fitch. 



(Food plants: Apple, cherry, currant, elm, pear, etc. See und(>r 

 "More important scale insects.") 



For biblioj^raphy and food plants see Fernald, Cat. Coccidjc of 

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

 book, U. S. Dept. Ag-ric, 1894, pp. 259-201, iig. 



Exhibit: Infested twig. 



THE SAN JOSE SCALE. 



Aspi(hoti(K pcriilcioi^Hs Coiiist. 



(Food-plants: Almond, apple, apricot, birch, ))lack wahmt, black 

 currant, catalpa, chestnut, crab-apple, crab-grass, cherry, grape, hick- 

 ory, oak, peach, pear, persimmon, plum, poplar, prune. Rocky Moun- 

 tain cherry, rose, silver maple, willow, and many othei- plants. See 

 under ''More important scale insects.") 



For bibliography and food plants see Fernald, Cat. Coccida' of 

 World, Bui. 88, Mass. Agr. Coll., pp. 271-275, IWS; Howard and 

 Marlatt. Hul. 3, n. s., Div. Ent., U. S. Dept. Agric, 1896. 80 pp. 



Exhibit: Infested twig. 



PUTNAM SCALE; CRANBERRY SCALE. 



At<jii'liiitii.'< iiiK-iihis I'ntii. 



(Food-plants: Apple, apricot, box-elder, cottonwood. (•i:uil)crry, 

 elm, licndock, maple, oak. peach, ])ear, plum, etc. Sec undci- "" More 

 important scale insects.") 



For bibliography and food plants see Fernald, Cat. Coccida- of 

 World. Bui. 88, Mass. .\gr. Coll.. ]>]>. 252-253, 19(>3. 



Exhibit: Infested twig. 



THE CHERRY SCALE; FORBES' SCALE. 

 . ispidiotns forbetn .Inh ns. 

 (Food-plants: A]i])le, clxMry, cuirant. honey lociist. ]>each, ))ear 

 plum, walnut, etc. See under "• More important scale insects.") 



For bibliography and food plants see Fernald, Cat. Coccida' of 

 World, Bui. 88. M:iss. .\gi-. Coll., pp. 259-260, 19(»3. 

 Exhibit: Infested twig. 



2552H— No. 47—04 3 



