26 _ THE CHINCH BUG. 
broods annually of the chinch bug. That this insect may be able to 
adapt itself still further to changed latitude and environments and 
become single brooded is not at all impossible. As illustrating the 
ease with which insects, at least some of them, can change their 
habits to correspond with their environment, we have in South Aus- 
tralia the following facts regarding the codling moth, Carpocapsa 
pomonella I, of which, though being still double brooded, “ the 
winter caterpillars hatch into moths irregularly from the beginning 
of October until the middle of November and deposit their eggs 
accordingly, giving rise to a succession of young caterpillars until 
the beginning of December. About the third week in December the 
first moths of the second brood begin to appear and deposit eggs, and 
members of this second generation of moths continue hatching and 
egg laying until the end of February.” 
The author’s notes on the chinch bug in northeastern Ohio are 
as follows: Very young larvee, with what appeared to be their pro- 
genitors, were observed at Jefferson, Ashtabula County, within 11 
miles of the shores of Lake Erie, June 16, 1893, there being no 
advanced larve among them. On August 27, 1896, a few miles 
south, at West Andover, in the same county, only adults were 
observed in two days’ search, though some of these showed by their 
color that they had but recently passed the pupal stage. In this 
latter locality, May 7, 1897, the sexes were pairing, but no young 
"were present so far as could be observed, while to the south and west 
of this locality, June 8 and 9, precisely the same conditions obtained 
as to the bugs, no young appearing at this time. Quite copious rains 
might have destroyed the young, but within 15 miles of these locali- 
ties, on July 14 of this year, larvee were found after first molt and 
stages intervening between these and the adults. Near Youngstown, 
on October 8, 1897, only adults were present, pairing was not in prog- 
ress, and the insect was not pairing in Ashtabula County on August 
27, 1896. June 9, 1898, only two very young larve could be found 
at Salem, about 15 miles southwest of Youngstown. 
Up to October 17, 1898, no young of a second brood had been 
observed, though careful search had been made from time to time in 
the fields and meadows of northeastern Ohio, and a large number of 
adults which developed in July and August, and since kept in con- 
finement, had not only not reproduced, but had shown no disposition 
whatever to pair. On the other hand, in southwestern Ohio, in the 
vicinity of Cincinnati, on September 24, where the species occurred 
in abundance, fully 75 per cent were pups, the remainder being made 
up of larve, some of them quite young, and adults in about equal 
a 
4George Quinn, in Journal of Agriculture and Industry, South Australia, Vol. 
ito akiey 
