Australian insectsFroggatt, Walter W. (Walter Wilson)
Science
Australian insects
Froggatt, Walter W. (Walter Wilson)
Insects -- Australia
The larvae of these beetles can be often found in numbers feeding in
the different kinds of woody fungi that grow upon tree trunks, old
fences, and fallen logs. If these infested fungi are collected and kept
in a box the beetles can be very easily bred out. They can be readily
recognised by their elongate, boat-shaped form, and clubbed antennae.
_Episcaphula pictipennis_, one of our commonest species, is black, but
thickly mottled with deep orange red forming three interrupted bands
across the elytra. It measures about ¼ of an inch. _Thallis janthina_
is a smaller, shining, blue black beetle, slightly roughened on the
elytra; it breeds in the large, spongy, white fungus growing on the
tree trunks known as “punks.”
Family 52. Lady-bird Beetles.
COCCINELLIDAE.
These well-known beetles differ from the last family (which many of
them resemble in outward appearance) in having 3 jointed tarsi, and the
short usually 11 jointed antennae (occasionally 8–10) being slightly
clubbed at the tips. In their habits however they differ in being
carnivorous both in the larval and adult state, with the exception of
the members of the Genus _Epilachna_, which are phytophagus. They are
all small rounded beetles; the short head fits close into the thorax,
which in turn rests against the front of the elytra: most of them are
yellow, spotted or marked with darker yellow, metallic blue or black,
and are slightly pubescent. These insects are well known in our gardens
to the children as “lady-birds,” and the quaint rhyme of “Fly away
lady-bird” is said to have originated in the hop fields of Kent: after
the hop picking, the dead plants, where the common English lady-bird
was abundant feeding upon the hop aphis, were burnt off, and this was
a warning by the children to them to fly away before the fires were
started. They have been closely studied by economic entomologists
because they are the natural enemies of so many aphis and scale insects.
[Illustration: =Fig. 100.=--_Epilachna 28-punctata_
(Fabr.).
The Spotted Leaf-eating Lady-bird.
(“Agricultural Gazette,” N.S.W.)]
Over 2,000 species have been described from all parts of the world,
and in the latest list given by Lea (Pro. Linn. Soc. N.S.W. 1901), 110
are recorded from Australia. Mulsant published his great work (Species
Coleopteris Trimeres Securipalpes) in 1850: Crotch published his
“Revision of the Coccinellidae” in 1874; in both of these will be found
descriptions of Australian species. Blackburn (Trans. Royal Soc. S.A.
1892) and Lea previously quoted, added a number of new species to our
fauna.
[Illustration: =Fig. 101.=--_Epilachna
guttatopustulata_ (Fabr.).
The Potato-leaf Lady-bird.
(“Agricultural Gazette,” N.S.W.)]
[Illustration: =Fig. 102.=--_Leis conformis_
(Boisd.)
The Common Spotted Lady-bird.
(“Agricultural Gazette,” N.S.W.)]
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