234 Report OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
The celery caterpillar, Papilio asterias, is found in varying 
numbers every year. During the past two years it has been 
unusually abundant in western New York, causing injury, es- 
pecially to celery in the seed bed. It is easily checked by spray- 
ing with paris green, where practical, or jarring the caterpillars 
to the ground and destroying them. 
INTRODUCTION. 
This bulletin is the second of a series dealing with miscella- 
neous notes on injurious insects, of which Bulletin No. 180 is 
the first. These notes aim to deal principally either with sub- 
jects that are considered of too little importance at the time 
to be the objects of extended investigation, but are of too much 
interest to be laid aside; or with topics upon which immediate 
information is desired. In some cases they may be preliminary 
to a more exhaustive discussion to appear in a later publication. 
While, in the main, the notes are intended to be the result 
of our own observations, the demand for immediate information 
concerning species that have been but little studied here at the 
Station sometimes makes desirable a collection of data from 
other publications. In such eases the literature of the subject 
is drawn upon freely. 
I. THE PERIODICAL CICADA. 
Much interest is again being manifested in the periodical 
cicada or, as it is more often called, the seventeen-year locust, 
because of the expected appearance above ground during the 
spring of 1902 of one of the largest broods known in the United 
States. Considerable anxiety, especially on the part of fruit- 
growers, is also apparent as to the probability of injury to 
young trees and vines. As a result there is much demand 
within the State for information concerning this species. It 
may be added, however, that the peculiar interest with which 
this insect is viewed lies not alone in the fact that many are 
apprehensive of injury to their crops, nor even in its interesting 
habits above ground; but one naturally considers it no small 
privilege to look upon a living, active creature that has just 
emerged from a comfortable sojourn of seventeen years under 
the sod. 
