PLANTS NOT INFESTEDo 41 



Phellodendron sp. 



Philadelphus coronarius Linn. Mock orange, syringa. 



Pinus sp. Pine. 



Platanus occidentalis Linn. American plane, buttonwood. 



Potentillafruticosa Linn. 



Quercus (all species). Oak. 



Eetinispora (all species). Japan cypress. 



RJiamnus sp. Buckthorn. 



Rhododendron sp. 



Sciadopitys verticiUata Sieb. & Zucc. Umbrella pine. 



ShepJierdia sp. ' 



Smilax sp. 



Sophora japonica JAnn. Japan pagoda tree. 



Staphylea sp. Bladder nut. 



Stephanandra flexuosa Sieb. & Zucc. 



Styrax japonica Sieb. & Zucc. 



Tamarix sp. 



Taxodium distichum Rich. Bald cypress. 



Taxus sp. Yew. 



Tecoma radicans Juss. Trumpet creeper. 



Tsuga canadensis Carr. Common hemlock. 



Vaccinium sp. 



TT'7s/«rm sp. . - " 



Xanthoceras sorbifolia Bunge. 



Xanthoxylum arriericanum Mill. Prickly ash. 



Certain species have been reported as seriously infested in one part of the country 

 and as exempt in other localities. Such plants have been placed in list No. 1. 

 Quince is reported as being rarely infested, by Felt, of New York, and by Smith, of 

 New Jersey. Sanderson writes that willows and poplars are not commonly infested 

 in Maryland and Delaware, but in Connecticut willow hedges have been seriously 

 infested, and young willow and poplar trees in nurseries have been thoroly incrusted 

 by the scales. Cockerell reports that osage orange is not infested in New Mexico 

 tho much grown, and that Catalpa, elm, and walnut have not been found infested. 

 Apricot, quince, and poplar are also reported as not being infested in New Mexico. 

 Alwood, of Virginia, Burgess, of Ohio, and Felt, of New York, place the sour cherry 

 (P. cerasus) in list No. 2, tho I have never found it infested in Connecticut. Burgess 

 suggests that Kieffer pear be placed in the same list, but it is reported by Alwood as 

 being badly infested in Virginia. Linden was placed in list No. 1 by the commis- 

 sioner of agriculture of New York, while the hop-tree {Ptelea trifoliata) was placed 

 in the same list by Fernald of Massachusetts. Elm was placed in list No. 1 by 

 Webster in Ohio and Troop of Indiana. Smith, of New Jersey, finds European elm, 

 purple-leaved beech, and Japanese walnut badly infested, while the common quince, 

 cherry (except on Japanese stock), apricot, and poplar are not commonly infested. 

 He has not seen the scale on birch, linden, persimmon, Catalpa, Acacia, or Buxus. 

 Alwood, of Virginia, puts the common privet {L. vulgare) in list No. 1, while Koehler, 

 in Connecticut, mentions it as one of the plants upon which he has not found the 

 scale, tho growing near infested plants. Gossard, of Floinda; Scott and Fiske, of 

 Georgia, report Citrus trifoliata as being badly infested, while Alwood, of Virginia, 

 places this plant in list No. 2. C. aurantium the common orange, is rarely infested, 

 according to Gossard. 



In Connecticut the most commonly infested plants are apple, pear, peach, Japan 

 plum, and currant among the fruits, tho sweet cherry, European plum, quince, and 

 gooseberry are sometimes seriously injured. 



