-6si- 
othor hand there is sene evidence that the unusual prolonged heavy precipitation 
during the* latter part of July resulted in the partial destruction of eorly laid- 
egg S| as well as interrupting?: and prolonging the oviposit ion period, As a result, 
eorly fall larval development was somewhat delayed, hut the mild late fall per- 
mitted larval development to progress so that at the time of entrance of larvae 
into hibernation, larval development ” r as about normal. 
At the close of the 1930 beetle season, the area of general distribution 
was estimated to cover approximately 15.117 square miles, an increase of 1,266 
square miles aver that of the previous year. This area was distributed among 
the various States as follows* Delaware, 1,0^3 square miles; Maryland, 1,157» 
Pennsylvania, ^,53^7 Hew Jersey, 7,227; Hew York, 993. ,0 ,.nd Connecticut, l63« The 
fallowing points roughly define the limits of the area of general distribution: 
Lewes and Milford, Del.'; Barclay and. Baltimore, Md.j Delta, Harrisburg, Manheim, 
Hamburg, and Portland, Pa.; Andover and Ponpton, IT. J. ; Suffern and Peeks kill, 
H, Y. ; and Ridgefield and Westport, Conn. The area of isolated colonies includes 
the States of Georgia, South Carolina, .’North Carolina, West Virginia., Ohio, 
Indiana, Illinois, Michigan, .and thh States to the east thereof. In this area the 
colonies or points of infestation are for the mos.t part of a minor character, 
quite localized, and widely separated. The ar- of general distribution and of 
isolated colonies are shown on the accompanying nap. 
As in previous years, the regional concentration of beetles varied through- 
out the area of general distribution, as shown. by the accompanying nap* The in- 
festation was heaviest, and decidedly heavier than in 1937> throughout the greater 
part of this area lying in Delaware and Maryland and in Chester and Delaware 
Counties in southeastern Pennsylvania. Within this area, one fairly continuous 
tract, estimated at 9 00 square miles, was generally characterized bv an exceptional 
extent of sever foliage injury. The outstanding feature of this tract was the 
unusually high percentage of apple orchards approaching complete defoliation, 
while injury to shade trees, such as elms, planes, and oaks, was much more gen- 
eral and severe than normally encountered* There was also an area of very he^vy 
beetle concentration, surrounding and including both metropolitan and suburban 
New York City, at many points in which area, beetles' were numerous enough to cause 
severe foliage injury. Throughout the remainder of the area of general distribu- 
tion, comprising the greater part of New Jersey and eastern Pennsylvania, the 
infestation was not generally a.s heavy as in 1937, except in restricted tracts. 
However, during, the 1937 season infestations heavy enough to cause obvious tree 
injury wore present in approximately 7,310 square miles, or nearly half of the 
entire area considered generally infested. 
In Hew England there was in 1933 a general increase in beetle abundance 
at the isolated colony rites in the more southern part of the range in Connecticut, 
Massachusetts, and Rhode Island. The natural dispersion of the insect has now 
carried it into the southwestern corner of Connecticut, where it may be expected 
to eventually fuse with developing local colonies. In 1930 several' heavy but 
restricted infestations were found for the first tine in the Berkshire area in 
southwestern Massachusetts. In the more northern portion of the range of the 
insect in New England, there has been little if any increase this year, ir, hile at 
some sites in Hew Hampshire beetles appear to have been somewhat, scarcer than in 
previous years. « 
