
























onal history work, the records on the phenological blanks should be re- 
id to consecutive observations on broods of even stages of development. 
he records on parent adults relate to the activities of overwintered indi- 
e first eggs, larvae, pupae, adults, and emergence relate to the date on 
ck the first were observed in a given series of even aged broods. Maximum is 
he stage appears to be most common, and the last refers to the very last ob- 
fed. This as well as maximum may require a number of checks but the last check 
tinued records will give the latest date. It is often necessary to make a 
explanatory note following the check to include a more detailed note on the 
sk of the sheet under date of the observation, indicating such notes by a number 
lowing the check. 
Under attack - the first, maximum, and last attacks relates to the attack 
n individual tree or part of a tree on which continued observations are to be 
6. A note on the back of the sheet, in the diary or on a numbered card corres- 
ing with the numbered tree should give more detailed information about the 
tion of the tree when attacked and the concentrated or scattered character of 
; ttack.. Then sections of the trunk or bark with a preponderance of even date 
tacks should be utilized for consecutive observations, utilizing certain parts 
msecutive observations in which small sections of the bark may be removed by 
of a chisel and later replaced and secured with a nail to prevent, as far as 
le, the drying out of adjacent bark. Other sections should be left undisturb- 
emergence records, and still other sections to be removed at longer intervals. 
+8. addition, sections of trees should be caged for generation studies, placing 
3sh sections in the cage as soon as the final emergence of brood adults is noted, 
‘There are many other features, methods and devices which will suggest themselves 
the Studies progress. 
In the earlier work specimens and memoranda should be sent in to the Washington 
fice at frequent intervals on matters of special interest and those on which 
ments or advice is desired. 
_ The phenological records on plants kept in connection with those on insects, 
11 serve ag & general basis for the comparison of events, but special notes should 
made on certain species of trees which appear to serve as an index to the time of 
ing of, and general emergence, and the beginning of, and general attack of 
ea stages of overwintered broods which are the 6vents of primary impor- 
in connection with control work. 
