7 -2- 
mn of temperature and humidity, and with different kinds of cages there is 
@ifference in the eer and actual amount of humidity, and temperature. 
exa ole, glass jars partly filled with sand retain a more constant and uriform 
i ty than do the flower pots. Tae flower pots dry rapidly and usually need to be 
every few days. What effect these two types of cages would have on adults is 
wn but it seems to me that inasmuch as we know that humidity will alter the color 
ould do our work in such a manner that we could get from our notes information con- 
z the type of cage in which the insect was reared. a? 
; In my systematic work I have found that reared parasites are often "dif- 
Fent species" than those which have been collected and even if it is the same 
ies" and from the same host there is often a great variation in coler, and to 
© 6xtent the structure in reared material from different parts of the country or 
om different collectors. The question occurs, does any of this variation come 
a difference in methods of rearing? 
it Seems to me that it would be extremely desireab sle to have publication de- 
ibing and illustrating in detail all of the various methods used in in rearing 
that each one of these methcds should be designated by some name or symbol so it 
Gd be possible to state in the notes what type of rearing cage was used. Prepar- 
on Of such a publication would require considerable time and it seems to me could 
y be handled by a committee more or less familiar with the various types of cages 
lready in use. Then if the committee was supplied with descriptions and illustra- 
8 3 





























fons Of all of the types of cages used in the various field stations they could de- 
ne SOme method of classification and designation of the various types. At the 
tern Field Station we use a combination of letters to designate the types of cages 
om have used all the letters from A to G." 8. A. Rohwer. 
letter: It was suggested several years ago to a member 
f the a that if an excess of moisture and its attendant humidity, obtaining 
londraining, glass hase jars, were undesirable features, the condition might 
LE 
e 
ike a lamp wick) one end to be placed 
6 sand at the bottom of the jar, andl the other end carried over the side of the 
q and hanging on the outside. 
_ While the moisture would te carrie 
by normal evaporation, i+ would ob 
ry attraction more rapidly 
+ a 
lation of moisture, and thus correc 
s an unduly large 
gh humidity. 5B. A. R.J 
| 
Teme AN ATR 
Pl BLICATIONS VO FOR THE CURRENT 
A change from the usual procedure, respecting public s of the Department 
pemeraiculture, has been made effective for the ensuing fiscal year. ‘The total 
fopriation available for all printing has been prorated among the different 
reaus of the Department. This allotment a Nades Farmers’ Bulletins, Department 
Lletins, Circulars and Reports, miscellaneous and job printing. 
While this method of apportioning the printing fond has many advantages over 
obtaining in previous years, the sum allowed must bs administered with strict 
onomy or the number of publications must be reduced. 
“There are several ways in which the employees of the Bureau may assist in 
sbtaining the best results from the limited fund. 
of (1) Plate work is the most expensive item relating to printing. 
Do not overbalance your paper with numbers of illustrations that do not 
ovate the subject opportunely. Do not furnish more than a single photograph to 
Strate a given feature. Avoid repetition of idea “in illustrating your bulletin. 

