. *   rl  
, iii 438 Bulletin NO. .737 ’ ,
, r rapidity. After scratching away vigorously a moment she  
i ~ .   stopped and went away a short distance. \Vhile gone ya very  
j I · j   small gray fly appeared and hovered over the partly titled hole,  
_V . .r but disappeared like a flash when she returned. She began _
_` · throwing in the dirt again, but a hit of a dead weed getting
I ' . lodged across the opening, she finally seized it with her jaws
J _ and carried it away. I should have thought nothing further of  
~· the little gray fly had it not, as soon as she was gone, appeared V
r ‘ over the burrow again, and hovering there dropped some white ;
_ , object into it. \Vhen the wasp had completely filled the hur- i
' ,     y row and leveled it up so that its location was not noticeahle, l
, , I . she rose into the air and moved steadily out of sight as if she ‘
· ` _     had no further interest in that locality. As soon as she was
V V , , gone I renzoved the dirt carefully and examined it with a hand l
magnifier, when it was found that the little Hy had deposited
I V not an   as was supposed, hut a living grub or maggot. The ,
I army—wor1n was then dug up and on one side of it was found the *
V g long translucent   placed there hy the wasp. . The worm was L
. _ of course to he a supply of fresh meat for her young. V
, The next day while coming up the walk to my rooms in the
IV Station Building I saw ya second wasp of the same species with  
,` a worm. I watched it forsome time, and while it was wan- V
“ dering in the midst of a hunch of knot—grass tpolygoiinm arte- ,
. Zarc`) saw another of the little gray flies flitting ahead of it l
and evidently keeping watch of its 1novements. The fly was
too quick for nie, however, and escaped, hut I got a good look
at it this time, and helieve it was one of the flesh flies of the
’ genus Sareophaga, which are known to produce living young.
The wasp, which appeared to be disturhed hy my presence,
did not locate her hurrow, perhaps did not care to do so
· while I was looking, and was finally captured and preserved.
V The {U`]Ny·\\`Ol']H she carried, weighed hy a chemical halance V
exactly 0.6912 gram, nearly nine times as much as the wasp,  
which weighed only 0.0T84— gram. Whetlier the gruh of the  
wasp cats up the cuckoo fly, or the latter with its earlier start, *
eats the gruh of the wasp, I am unahle at present to say. Pos-  
sihly hoth find the army-worm sufficient for their wants. In  
any case the army-worm does not survive, which is a more
practical, if less interesting consideration. I
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