FOOD PLANTS OF THE GIPSY MOTH IN AMERICA. 7 
Mountain ASH (Pyrus americana [Marsh.] D.C.). 
No observations were made on this species by the field men. 
Tray experiments for a single season at Worcester were not conclusive, but 
the results at Melrose Highlands indicated that larve will feed continuously on 
this plant from the first stage and reproduce normally. 
Rep ASH (Frazinus pennsylwanica Marsh.). 
But few field observations were obtained on this species, and those were to 
the effect that gipsy-moth larvee do not feed on red ash. 
All larval stages from the first to the fourth, inclusive, were tested at the 
Melrose Highlands laboratory, but no pup were obtained. 
When the blossoms were placed with the foliage in the trays, there was con- 
siderable feeding on the former but the leaves were not injured. 
WHITE ASH (Fraxinus americana L.). 
This most common species of Fraxinus has been noted by all the field observers, 
but none reported feeding on the foliage by gipsy-moth larvze except where other 
- species of trees are nearly or wholly defoliated. Even then there was little 
feeding in most cases. Mr. Proctor reports that branches on several trees of 
this species were completely stripped in an area badly defoliated by the gipsy 
moth. 
White ash was tested in 1912 both at Worcester and Melrose Highlands. 
At the former laboratory, the larve from the first to the fifth stages, inclusive, 
produced no pups. At Melrose Highlands trays started with fourth-stage 
larvze produced male moths only. 
FLAME AZALEA (Azalea lutea L.) AND WHITE AZALEA (Azalea viscosa I..). 
Mr. Schaffner had the former species under observation and found that 
wherever it was situated in badly infested localities feeding on the foliage was 
rather heavy. This foliage will probably sustain the gipsy-moth larve in all 
Stages, but the tray work at Melrose Highlands failed to bring them through 
from either the first or second stages. From two trays started with third- 
stage larve, male moths were secured. 
There was practically no difference in the amount of feeding on these two 
species. 
EUROPEAN BARBERRY (Berberis vulgaris L.). 
Barberry has been under observation in the field, and all the observers have 
found gipsy-moth larve in all stages feeding upon it. It is not considered a 
particularly favored food, as larve feeding upon it seemed quite susceptible to 
disease. | 
The species will support the larve in all stages, adults having been reared 
from trays started with first-stage caterpillars. 
BAYBERRY (Myrica carolinensis Mill.). 
In sparsely infested territory, feeding on this species is light, but when the 
infestation is heavy these shrubs are sometimes completely defoliated. 
Reproduction has been satisfactory when small caterpillars have been tested 
in the trays. 
