al 
6 FARMERS’ BULLETIN 723. 
Mountain ash, European (Sorbus aucu- | Rhamnus sp. 
paria Linn.). Rose (Rosa rugosa Thunb. ). 
Myrtle ( Myrtus sp.). Sassafras (Sassafras sassafras Karst. ). 
Nectarine (Amygdalus persica nectarina | Silverberry (Elaeagnus argentea Pursh.). 
Ait.). Spiraea spp. 
New Jersey tea (Ceanothus americanus | Spruce (Abies firma Sieb. & Zucc.). 
Linn.). _ Sunflower (Helianthus sp.). 
Oak (Quercus pedunculata Ehrh.), (Quer- | Sycamore (Platanus sp.). 
cus spp.). Tallow tree (Sapiwm sebiferum Roxb.). 
Orchid. Tamarisk (Tamarix africana Poir.). 
Pachysandra terminalis Sieb. & Zuce. Tree of Heaven (Ailanthus cacodendron 
Peach (Amygdalus persica L.). [Ehrh.] Schinz. & Thell.). 
Pear (Pyrus communes Linn.). Tulip-tree (Lirtodendron tulipifera Linn.). 
Pear, Seckel. Umbrella tree (Magnolia tripetala Linn.). 
Peony (Paeonia sp.). Viburnum sp. 
Peppergrass (Lepidium  suffruticosum | Virginia creeper (Ampelopsis quinque- 
Linn., Cav.). folia Michx.). 
Planera keakei ©. Koch. Willow, goat (Salix caprea Linn.). 
Plum (Prunus domestica Linn.). Willow, Napoleon (Salix babylonica 
Poplar, Carolina (Populus deltoides). Linn.). 
Poplar, Lombardy (Populus nigra var. | Willow, osier (Salix viminalis Linn.). 
italica Du Roi). Willow (Salix aegyptiaca Forsk.). 
Poplar, white (Populus alba Linn.). Willow (Salix pedicellata Desf.). 
Prunus sargentii. Walnut, English (Juglans regia Linn.). 
Quince (Cydonia vulgaris Pers.). Walnut (Juglans sp.). 
Raisin tree (Hovenia dulcis). Yucca (Yucca sp.). 
taspberry (Rubus spp.). 
PARASITIC AND PREDACEOUS ENEMIES. 
Minute parasitic wasps are often efficient enemies of this scale, and 
in some localities they apparently hold the insect in check. If these 
little friends ! are present, small round holes can be seen on the dorsal 
part of the scale showing where the adult escaped. 
The larve of coccinellids, or ladybeetles, are sometimes found feed- 
ing on these insects, and certain species of mites assist in their de- 
struction. Birds are also credited with doing service, the most effi- 
cient being the titmice and tree creepers. 
THE SCURFY SCALE. 
The scurfy scale, while infesting a considerable number of plants, 
is a less general feeder than is the preceding species. It occurs prin- 
cipally wpon rosaceous plants, such as the apple, peach, pear, plum, 
cherry, etc., and also on currant and gooseberry among cultivated 
plants, but seldom becomes so abundant as to cause particular injury 
or to require specific treatment. The insect may be recognized from 
the accompanying illustration (fig. 3), much enlarged. The scale of 
the female is dirty gray in color, irregularly pear-shaped, as shown in 
the picture. The male scales are much smaller, elongate, snowy white, 
1 Those more commonly found are A phelinus mytilaspidis Le B., A. abnormis How., A. fuscipennis How., 
A. diaspidis How., Aspidiotiphagus citrinus How., Anaphes gracilis How., and Cheiloneurus diaspidinarum 
How. 
