curring in the agricultural areas of the Pacific. Northwest have been 
nade and the preparation of a key for their determination is in prog- 
ress. 
Physiological studies furnish information regarding digestion 
and sexual maturity of wireworms.--C. E. Woodworth, Walla Walla, re- 
ports that in the study of digestion by wireworms four major observa- 
tions have been made, each of which is being studied in some detail. 
These observations are: (1) Some foods are partially digested before 
being teken into the body; (2) foods are usually taken into the body 
in solution or in the colloidal state; (3) digestion is aided inthe 
nid-intestine by the procedure known as strangulation of the tract 
cells; (4) bacteria usually play an important part in the economy of 
digestion for food utilization. In this picture the fat bodies are 
or great imperteuce and starch 1s cnanged to Tat in a remarkably 
Short time. Much work is still to be done and the information on 
the details of these processes is very fragmentary. G. E. Woodworth 
further reports that in life-history studies it has recently been 
found that unexpectedly low temperatures favor the a felopment of 
the ovaries. Of all the temperatures tried, 63.5° was the most 
advantageous. Spermatazoa have been demonstrated in Sila testes as 
early as the first of October, out were not found in the lateral 
horns of the seminal vesicle until about the end of October. Sperm 
has not been RE as yet in the main body of the seminal 
vesicle. From observations on egg and sperm development, it seems 
that there is little chance of a fall flight, a considerable period 
of relatively low temperatures being uecessary for good development 
of egg 
S58 
a 
Naphthalene treatment for wireworm control gives favorable re- 
Ssults.—-R. S. Lehman, Walla Walla, reports that "The results obtained 
from crude naphthalene as a fumigant.in the field against wireworms 
during the past season were quite: satisfactory. Up to the present 
time with concentrations of 800 pounds of crude naphthalene to the 
acre, mortalities of from 60 to 90 percent have been obtained. This 
wide range is probably due to the variations in soil texture, mois- 
ture, und temperature, and to the mixture of naphthalene with the 
soil in the various fields. It should be understood that these ex- 
periments were conducted under a variety cf conditions, some favor- 
able and some very unfavorable, so a wide variation is to be ex- 
pected." Crude naphthelene may be obtained f. o. b. Walla Walla at 
a cost of $28 per 100 pounds. The cost at Philadelphia, Pa., and 
Portland, Oreg., would .be $16 and $22, resvectively. When it is 
-considered that one treatment will suffice for at least 2 years and 
possibly much longer,.the cost per acre per season is relatively low. 
