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necessary to discontinue plowing in bottom-land fields in some 
instances on account of the severity of attack on the teams 
and men. 
CATTLE 
OX 7ARBLSS ( Hypoderma line a turn DeVi.ll.and 
H. bcvis DeG, )' 
General . F.C.Bishopp (.April 2c): Sufficient observations were not made 
Statement during the Writer and spring of 192o to justify general conclusions 
regardinggthe decree cf infestation of cattle by these insects. 
Examinations of herds in the vicinity of Washington, D.C. , 
indicate that they are about normal in numbers in that section. 
Continued observations luring the winter ard spring in Burke's 
Garden, Va. 5 by L.I. Case show the infestations to run high, al- 
. . though figures for previous years are lacking. Several animals 
"•ere found to carry over ICC grubs at one time. -Collections on 
March 23 contained 9^.3 per cent ■ rlypoderm a bo^ is,, and 5. 7 per 
cent H. lineatum . All of the latter were practically mature, 
indicating that cattle -ere practically free of this species 
on that date. Mr. C.C.Comptbn reports a heavier infestation 
in Kane and adjacent counties in Illinois than is normal for that 
section.' Stockmen in Kansas are under the impression that grubs 
were.. mere numerous this year than normally. Apparently the number 
of. grubs at various points, in .Tax;. s was about normal. 
Oregon Don C. Mote (March 12): Last-stage larvae of . K yocd erma bevis 
were squeezed from the backs of cattle on this date. Hone of 
them were mature, however. 
HO?.!! FLY .( Haematob ia irritans L. ) 
Texas D.C. Barman (April &): ■ The horn fly has increased considerably 
during the last week ana they are noticeable on most cattle, 
and many-have, as high as -1, COO to 1,200 flies on them. (April 9): 
Every cow observed from Uvalde to 25 miles north has black 
patches of flies en them; there are from 5C0 to 2,3C0 flies on 
all cattle, and they are "-crrying cattle to a great extent, 
and horses and mules are being annoyed. (April 22): This section 
("value) was visited by a storm and heavy rain (4 to 12 in,) on 
April 20 and it is rare to see a horn fly en any stock. 
F.C.Bishopp (April 5): Hern fly infestation in this section 
(Wortham) is comparatively light for this time of the year. The 
number of flies per animal decs not average over ':0. 
CATTLE LOUSE ( Trichodect.es scalar is Efitzsch) 
Wisconsin T.Gustafson (Marsh 13): Cattle are severely attacked by this 
insect at Brentwood. 
