
ay es Wem 




ra B. fonscolombei M. vitripennis Fliesiete Ale 
Area Year Number Per cent Number Per cent Number Per cent 
Total 1929 12,728 59155 5;246 0.42 19,317, 60.03 
all 1930 6,840 28.42 9,203 1:03 16,982 10705 
areas 1931 3,071 36.08 1,085 O57 5,409 63755 
Mr. Parman states that host tests made for Alysia ridibunda Say "in- 
dicate that A. ridibunda has a preference for sarcophagid larvae, as a 
large emergence was obtained from each successful sarcophagid test while 
only one parasite emerged in each of the Synthesiomyia and Lucilia tests." 
R. W. Burgess, who is engaged in investigations of eye gnats 
(Hippelates spp.) at the Coachella, Calif., laboratory, submits data com- 
piled by Glen 0. Robertson, Agent, on status traps, showing that "the 
monthly status for November has been very low as compared with last 
year." In reviewing this report, D. @. Parman says, "it is indicated 
that trapping has had a very decided control on gnats. * * * These 
traps were started the first of March this year and others not until 
May. The status for July was about the same this year as last year; 
the August abundance was about five times as great as last year, indica- 
ting an earlier and larger fall crop to be expected. Apparently the 
traps took a good percentage of this generation and prevented breeding. 
as the 1931 status catch for September was only 7.1 per cent of the 
1930; the October catch was 19.5 per cent of last year's; the November 
catch is 13.7 per cent of last year's. This appears to be rather more 
than can be expected for the number of traps in Coachella Valley, but 
an analysis of the status catches bears this out, as the decreases have 
been greatest in the areas near the traps. Idaho, for example, indi- 
cates 99 per cent control for November, and Coachella and Thermal are 
indicated to be almost as good." 
H. H. Stage, of the mosquito investigations project, Portland, 
Oreg., reports that "much field work has been continued this month (No- 
vember) in cooperation with the civic control agencies at Portland. 
The Civic Emergency Committee assigned 300 men to the Mosquito Control 
and Elimination Committee for the purpose of cutting and burning wil- 
low brush in the flood water district of Multnomah County, where mos-— 
quito control is practiced. This office has maintained close contact 
with this program because of its importance in future control. A great 
quantity of land is still to be cut over and the Civic Emergency Com-— 
mittee has accordingly approved an assignment of 250 men for this pur- 
pose for the month of December. At the end of November, approximately 
$30,000 has been expended on this work. The Mosquito Control Commission, 
in addition, has expended a total of about $450 for tools, supervision, 
and transportation to date." 
Mr. Stage made "a survey by boat * * * down the Columbia Slough 
with Worth Caldwell, Director of the Civic Emergency Committee, for 
