o2 BULLETIN 250, U. S. DEPARTMENT OF AGRICULTURE. 
HEMLOCK AND WITCH-HAZEL. 
The larvze fed freely in all stages on the witch-hazel, but none at all on 
the hemlock in the first stage; feeding increased gradually, and in the three 
last stages hemlock foliage was eaten freely. 
The larve were of good size and produced both male and female moths. 
CHESTNUT AND RED MAPLE. 
No feeding was apparent on the chestnut during the first and second stages, 
and it was moderate in the remaining stages. Feeding on maple was mod- 
erate in all stages. The larve were below average size, grew slowly, and only 
males developed. 
In the field similar results have been observed. 
CHESTNUT AND BLACK OAK. 
The larve fed freely on both food plants, except in the first stage, when 
they attacked oak exclusively. They grew steadily, attained large size, and 
adults were reared. : 
Field observations indicate that these species are freely eaten when growing 
in the same locality. 
CHESTNUT AND CHESTNUT OAK. 
The oak was fed upon freely in all stages. but the chestnut was eaten mod- 
erately in all stages except the first. Growth was slow and the larve died 
before pupating. 
CHESTNUT AND WHITE PINE. 
Larve started in the first stage died in the third stage or earlier. Those 
that molted once were very small and puny, while those started in the third 
stage produced a few male moths. Both plants were eaten quite freely in the 
last stages. 
Similar results have been noted in the field. 
AMERICAN LINDEN AND RED OAK. 
The larve fed lightly on the linden in the first few stages, and, although the | 
feeding increased slightly in the later stages, it was never excessive. Oak was 
preferred and was eaten freely in all stages. The larve developed rapidly, 
were of average size, and several moths were reared. ! 
In the field this combination furnishes very favorable food for the gipsy 
moth. 
Rep MAPLE AND WITCH-HAZEL. 
The larvee fed freely on both food plants in the first two stages, but from the 
end of second stage to the close of the experiment a preference was shown for 
witch-hazel. 
The larvz grew rather slowly and but few adults were obtained. 
WHITE PINE AND *WITCH-HAZEL. 
The larve fed moderately on witch-hazel in all stages, but none on pine 
during the first two stages. Later the feeding increased steadily to the end of 
the experiment.. 
The larve were of small size and but few adults were reared. 
