The Gloomy Scale 
9 
List of Host Plants 
Apple (Pyrus maius L.). Occasionally infested. 
Ask, white ( Fraxinus americana L.). Bureau of Entomology. 
Box-elder (Acer negundo L.). Occasionally slightly infested. 
Buckeye (AEsculus glabra Willd.). Slightly infested. 
Chestnut (Castanea spp.). Several badly infested trees. 
Cottonwood (Populus deltoidea M.) 
Currant (Ribes sp.). Bureau of Entomology. 
Dogwood ( Cornus spp.). Occasionally infested in the woods. 
Elm ( Ulmus spp.). A few slightly infested trees. 
Gall-berry (Ilex sp.). J. R. Watson. 
Hackberry (Celtis spp.). Slightly infested. 
Hibiscus. Bureau of Entomology. 
Iron-wood (Carpinus caroliniana Walt.). A single badly infested tree. 
Linden (Tilia americana L.). Bureau of Entomology. 
Maple, Norway (Acer platanoides) . A few slightly infested trees. 
Maple, red (Acer rubrum L.). Generally and badly infested. 
Maple, silver (Acer saccharinum* L.). Generally and badly infested. 
Maple, sugar (Acer saccharum Marsh.). A few scattering individuals 
found infested very slightly. 
Mulberry (Morus spp.) Sometimes very badly infested. 
Oak, live (Quercus virginiana L.). Bureau of Entomology. 
Oak, water (Quercus aquatica Catesb.). Sometimes slightly infested. 
Oak, willow (Quercus phellos L.). Sometimes slightly infested. 
Oak, white (Quercus alia L.). Sometimes slightly infested. 
Osage Orange (Madura pomifera Raffin.). Sometimes badly infested. 
Sarsa sp. Bureau of Entomology. 
Sycamore (Platanus occidentalis L.). Sometimes slightly infested. 
Tulip (Leriodendron tuliplifera L.). Sometimes slightly infested. 
Walnut (Juglans spp.). Some trees badly infested. 
Willow (Salix sp.). Sometimes slightly infested. 
APPEARANCE OF THE INSECT 
Armored scales differ from other insects with which most of us are 
familiar because they live between two scales or coverings like a turtle in 
its shell. They differ from a turtle in that the insect is not attached 
to the scales, whereas in the turtle the animal is attached to its shell. 
They differ from other insects also in that they do not have legs 01 
wings in their feeding stages j hence they cannot move from place to 
place, but are anchored on the bark of their host plant by means of their 
thread-like beaks. 
If we examine closely a twig of a maple tree which is lightly infested 
with gloomy scales we will find small circular elevations scattered 
about, which have almost the same color as the bark (Eig. 1). If we 
