New York State Museum Bulletin 
Entered as second-class matter November 27, 1915, at the Post Office at Albany, N. Y., 
under the act of August 24, Ig912 
Published monthly by The University of the State of New York 

No. 202 ALBANY, N. Y. OCTOBER I, I9I7 


The University of the State of New York 
New York State Museum 
JoHn M. CLARKE, Director 
EPHRAIM PoRTER FELT, State Entomologist 
THIRTY-THIRD REPORT OF THE STATE 
ENTOMOLOGIST 
IQI7 
Dr John M. Clarke, Director of the State Museum 
I have the honor to present herewith my report on the injurious 
and other insects of the State of New York for the year ending 
September 29, 1917. 
The cold and, in some sections of the State, excessively wet spring 
produced an unusual condition and many of the insects normally 
destructive were conspicuous by their absence, while a few com- 
paratively unknown forms caused serious losses, though a portion of 
these, notably in connection with the work of the seed corn maggot, 
was due largely to climatic conditions and the employment of methods 
poorly adapted to the abnormal conditions prevailing. The apple 
tent caterpillar has almost dropped out of sight as a serious pest, 
though late in the season a number of leaf feeders, such as the red- 
humped apple tree worm, the yellow-necked apple tree worm, the 
fall web worm, the hickory tussock moth caterpillar and some related 
species were uncommonly abundant and destructive. 
Fruit tree insects. An unusually interesting discovery was that 
of the recently established apple and thorn skeletonizer, H emer o- 
phila pariana Clerck, near Irvington and Nyack. This 
insect was so abundant in some localities as to skeletonize practically 
all the foliage, even in orchards of considerable size. The Ento- 
mologist made a study of the situation, worked out the life history 
of the species and in cooperation with agents of the State Depart- 
ment of Agriculture determined the approximate extent of the infested 
[7] 
