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Some
Cantal Coleoptera (Beetles)
The variety of habitat in this part of the Auvergne, with its
vast tracts of grassland with grazing livestock, mountain streams
and woodland supports a rich and diverse beetle fauna. Many
of the species are characteristic of mountain regions or higher
altitude.
Unlike butterflies, beetles often go unnoticed even though
they are all around us, but the occasional emergence swarm
of a species or a casual intruder scuttling across the patio
will sometimes attract our curiosity.
The following is the result of my (not very thorough) entomological
investigation of this delightful locality during two memorable
holidays; the first in April 2002 and the second in June 2005.
It attempts to give an indication of some of the more conspicuous
species which the interested naturalist may come across in
the course of his or her rambles.
The first
species Pyllopertha horticola was found in abundance in
the garden of the “Sweet Little House” in
the month ofJune. It is a chafer of the family Scarabaeidae
which feeds as a larva on the roots of grasses. It may occur
as an emergence swarm which synchronises the availability
of mates. It flies readily in warm sunshine and like all
beetles it is completely harmless.
The Blue Stag Beetle Platycerus
capreae, is quite rare occurring
throughout Europe in areas of high altitude. It is much smaller
than the commoner Stag Beetle, but has a similar life history,
spending its early stages as a larva in rotten wood, probably
of ash.
I came across three examples: one crawling across a path,
one resting on a fence paling and another under a stone.
It does not occur in G.B.
Dictyoptera
aurora is another montane species. It is a handsome
velvety brick-red colour.
In G.B. it occurs only in Scotland.
Saperda
scalaris is a strikingly marked longhorn beetle, one of
many species to be found
hereabouts. Like most longhorn
beetles, it is attracted to recently felled timber where
it lays its eggs and undergoes its metamorphosis. It is a
ready flier. The present specimen settled on a fallen cherry
tree by the stream near the junction of the road from “Sweet
Little House” and the main road as I was watching the
activities of another longhorn beetle Xylotrechus
rusticus.
Carabus
auronitens is a large handsome ground-beetle which
is nocturnal usually, but sometimes active in the day-time
on hot days. It is one of several Carabus species to be found
here. The others are C. monilis,
C. nemoralis, C. problematicus and C. cancellatus. The latter is a diurnal species (not
found in G.B.) which may be found running about on the turf
on the Puy de Sancy.
Chrysocloa is a leaf beetle
which occurs in damp meadows on knapweed and other compositae.
The example illustrated
is an unusual multi-coloured “rainbow” variety.
It is usually a sombre dark blue or even black. It is not
recorded from G.B.
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