PLANTS NOT INFESTED, 41 
Phellodendron sp. 
Philadelphus coronarius Linn. Mock orange, syringa. 
Pinus sp. Pine. 
Platanus occidentalis Linn. American plane, buttonwood. 
Potentilla fruticosa Linn. 
Quercus (all species). Oak. 
Petinispora (all species) . *. Japan cypress. 
Phamnus sp. Buckthorn. 
Rhododendron sp. 
Sciadopitys verticillata Sieb. & Zucc. Umbrella pine. 
Sheplierdia sp. 
Smilax sp. 
Sophora japonica Linn. Japan pagoda tree. 
Staphylea sp. Bladder nut, 
Stephanandra flexuosa Sieb. & Zucc. 
Styrax japonica Sieb. & Zucc. 
Tamarix sp. 
Taxodium distichum Kich. Bald cypress. 
Taxus sp. Yew. 
Tecoma radicans Juss. Trumpet creeper. 
Tsi(#a canadensis Carr. Common hemlock. 
Vaccinium sp. 
Tirana sp. • 
Xanthoceras sorbifolia Bunge. 
Xanthoxylum americanum 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 Jist 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 Florida; 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. 
