HOW
TO MAKE AN ANT COLLECTION
Where
to Find Ants: Ants are easiest to collect during warmer
months when they are active and their movements are more
easily observed. Since ant nests are found in diverse
terrestrial locations, it is wise to visit as mnay habitats
as possible. Many nests are found in soil, particularly
under rocks or near plants. Some species
prefer to live in preformed plant cavities (such
as hollow stems, or last year's walnuts or acorns). Often,
nests are found in leaf litter (particularly where
it collects in sheltered places). Other ants are only
found in rotten logs.
Collecting
Equipment: An aspirator or forceps (available
from various biological supply houses) is needed to collect
ants. I prfer th blow-type aspirator to avoid inhaling
spores and dust alon gwith noxious defensive chemicals
of some ants. I do not recommend collecting ants with
bare hands. Smaller specimens are easily crushed and some
larger specimens can bite or deliver a painful sting.
Each nest of aants collected should be placed in a separate
vial containing alcohol (either ethanol or ispropoanol).
I require 15 to 20 vials on short excursions. A garden
trowel or small spade is helpful for excavating nests.
After collecting, always replace the disturbed material.
A field notebook should be used to record specific
locality (including distance and direction from nearest
city), date of collection, and collector. Information
should also be written in indelible ink (or pencil) and
placed in each vial. Other useful information includes
habitat description, nest description, air and soil temperature,
and current weather conditions.
Since
many nests in a given area may look similar, several should
be examined to determine if multiple species are present.
Several "parasitic" ant species (such as Harpagoxenus
americanus or Polyergus breviceps) may be present
in a few nests. The odds of encountering such species
by opening one nest are quite small.
I
recommend pinning a small sample (3 to 6 individuals)
from each vial and retaining the rest in alchol (immature
stages should never be pinned). Always use paper points
and glue the ants to the edge. Insect pins and
points can be obtained from biological supply houses.
Refer to "Making an Insect Collection" KSN Vol.
35, No. 1, Oct. 1988 (page 4). I usually include a unique
cross reference number between each vial and corresponding
samples.
Based
upon my study of the ants of Kansas, I determined the
species most frequently encountered. These are listed
along with the number of collections (nests) for each
species. Over 3,700 nests were sampled.
Crematogaster
punctulata (317)
Monomorium minimum (265)
Forelius pruinosus (206)
Lasius neoniger (185)
Over
50,000 ants were collected during the course of this study.
Of that total, the following were teh species with the
highest number of individuals collected.
Monomorium
minimum (8,250)
Crematogaster punctulata (265)
Forelius pruinosus analis (3,057)
Pogonomyrmex occidentalis (2,607)
Based
on the above numbers, I believe the first three species
are the most common and most abundant ant species across
the state of Kansas.