Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
Pt. Barrow, Alaska
July 20.
Meter plots on ridge this afternoon-overcast
with easterly wind. Longspurs in groups of
5-10 especially around polygons of high
relief and transverse ditch sections across the
ridge. These man made ditches ±3 feet deep and
about 5-6' wide still contain some water, in depths
up to 1' and many midges and Muscoid flies
seem to congregate about their banks as do
also Tipulids. Though no sampling has been
done in these borders-especially those adjacent
to the water it appears at least superficially
that the pop levels are higher-concentration?
In spite of the overcast conditions + rain of
previous evening + early morning hours insects
were in much abundance. A walking sweep
over approximately 1 mile of terrain on ridge,
mostly over high polygons + intervening lows
and over marshy areas revealed presence
of great numbers of midges and Muscoid flies.
Tipulids both of the 2 "wriglers" female species
were in evidence about 1 or 2 per sq. meter
of high polygon type. Males were not quite
so abundant but can counts indicate that
their level is about equal to females.
Fungivoids seem to be lower—at least
in actual count on meter plots + general observations,
but may be not so active on this type of day