14 BULLETIN 250, U. S. DEPARTMENT OF AGRICULTURE. 
SPICE-BUSH (Benzoin aestivale [L.] Nees). 
No field observations have been made on this rather common shrub. 
In the trays the larve in all stages seemed to dislike the food and there was 
little or no growth. Death resulted in a short time from starvation and disease. 
BALSAM FIR (Abies balsamea [L.] Mill.). 
Mr. Gooch has had this species under observation. On July 14, 1914, he 
found in a mixed growth which was nearly defoliated heavy feeding on this 
- species by fifth and sixth stage larve. A few small trees were 75 per cent 
defoliated. No feeding was observed by earlier stages. 
In the trays little feeding took place before the third stage, and then the 
larve began to die rapidly and no adults were reared. This is an unfavored 
species. 
SWEET GALE (Wyrica gale L.). 
Foliage from this species used in two trays with newly hatched larve 
produced adult moths. This shows it to be a favored food plant, as the larve 
fed freely in all stages. 
Mr. P. S. Coffin found fourth and fifth stage larve feeding freely on sweet 
gale in Candia, N. H. None of the other stages have been observed feeding 
upon it in the field. 
GRAPE (Vitis labrusca L.). 
Tray experiments with the foliage of wild grape with each stage of the larva 
shows that the latter will die before reaching the next stage. There was very 
little feeding, which consisted of small notches being made in the edges of the 
leaves. 
Mr. Schaffner made observations on this plant in the field which agree with 
the results secured in the laboratory. 
HACKBERRY (Celtis occidentalis L.). 
Newly hatched larve started on this foliage reached the fifth stage before 
the last one died. They did not appear to care for the food and grew very 
slowly. 
Mr. Schaffner watched one tree of this species, but found no feeding at any 
time upon it. 
PINK HARDHACK (Spirea tomentosa L.). 
Ali stages of the larve have been observed on this species in the field and 
slight feeding has been reported, but the foliage will not sustain life through 
the different transformations. 
Larve in the trays died before reaching the succeeding stage. 
WHITE HARDHACK (Spireda salicifolia L.). 
Tray experiments and field observations show that this species is unfavor- 
able, since larve are unable to develop sufficiently to transform to the next 
stage. : 
~ 
HAWTHORN (Crategus sp.). 
Field reports indicate that this species is freely eaten by the larve in all 
stages. ; 
This species was tested in the Worcester laboratory and the larve fed freely 
in all stages, grew well and went through from first stage to adult. It isa 
favored food plant. 
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