1963] 
Bailey — Tingidae 
21 
and the light trap as well, were provided with circular metal hoods 
( 14" in diameter) from bird feeders to keep the rain out. The hoods 
were very effective with the bait traps. Of the three, one was con- 
tinuously supplied with the commercial Japanese beetle bait (geran- 
iol), in one no bait was used, and in the third the substances listed 
below were used, usually for a week at a time. These traps were run 
from late July until mid-September or during the period when the 
lace bugs were assumed to be moving from overcrowded hosts to 
others and into the period when many were expected to be seeking 
hibernation sites. In spite of the fact that alders within a few feet 
of these traps were infested, only one lace bug turned up in the trap 
catches. The substances used were amyl acetate, amyl alcohol, orange 
oil, oil of thyme, oil of peppermint, methyl salicylate, saturate sugar 
solution, and molasses. 
B. Environmental Conditions 
During the 1958 and i960 seasons, daily maximum and minimum 
temperatures were recorded and rainfall records were kept. In 1958 
an attempt was made to take light readings at 9:00 a.m., 12:00 noon, 
and 3:00 p.m. Eastern Standard Time. 
For a variety of reasons, fifty-six out of a total of 552 readings 
between April 15 th and October 15th were missed . . . roughly 10%. 
Even if the light readings had all been taken, however, they would 
have little measurable significance. On a few occasions, for example, 
I actually recorded a variation of as much as 4500 foot candles in 
light readings taken just seconds apart. On the usual somewhat 
cloudy days in New England, this would be the expected situation. 
Consequently, without equipment for continuous recording of light 
intensities from dawn to dark, no critical evaluation can be satisfac- 
torily determined. Furthermore, daily temperatures and rainfall 
records together serve as a good index of conditions controlling plant 
growth and incidentally, therefore, of conditions controlling the 
activities of such strictly phytophagous insects as the lace bugs. 
Temperature and rainfall data are, therefore, recorded graphically 
and any correlations between the tingid population cycles and such 
environmental factors will be evident. 
The Taylor maximum-minimum thermometer was attached to a 
board and protected from the sides and from the top by masonite 
shields. Thus sheltered, it was mounted about 6 feet high on the 
trunk of a Mulberry tree ( Morns alba L.) behind the house. Be- 
cause of the buildings and several large trees nearby, the tempera- 
tures recorded were probably less extreme than they might have been 
