Australian insectsFroggatt, Walter W. (Walter Wilson)
Science
Australian insects
Froggatt, Walter W. (Walter Wilson)
Insects -- Australia
Family 28. Digger and Chafer Beetles.
SCARABAEIDAE.
The group contains an immense number of handsome beetles, among which
are some of the giants of the beetle world, though there are also
many tiny ones; most of them in the earlier stages of their lives are
thick, fleshy, white grubs that live in the ground or decaying woody
matter, and sometimes do a great deal of damage to the roots of grass
and cultivated crops. Though these beetles vary much in form and size,
they have the antennae always produced at the tip into a laminate or
pectinate club, which when expanded forms a comb or brush-like process.
Kirby divides this family into eleven sub-families; Westwood into ten;
while Sharp reduces them to five, which is quite sufficient for our
purpose.
The first comprise the COPRIDES, or true Dung-burying Beetles; they
feed upon animal droppings, boring vertical shafts beneath fresh dung,
and carrying portions several inches under ground; on this they not
only feed, but also deposit their eggs in rounded balls of the same
material. In the more tropical parts they are also attracted to dead
animals, which they feed on in the same manner. They have a shovel-like
rim round the front of the head, often ornamented above with spines or
horns both on the head and thorax, particularly in the male sex; and
their legs are admirably adapted for digging.
The Sacred Beetle, worshipped and carved on the monuments by the
ancient Egyptians, _Ateuchus sacer_, is typical of the group.
_Cephalodesmius armiger_ is a black beetle, about ⅓ of an inch in
length; it has a small head produced in front along the outer margin
into four spines or horns standing out straight in front, the two
middle ones longest; the thorax is finely punctured; and the wing
covers are slightly striated.
_Temnoplectron rotundum_, about the same length, is a shining black
beetle; the head is flattened and turned down; the whole of the dorsal
surface is smooth, and the wing covers are oval toward the apex.
The Genus _Onthophagus_ contains most of our typical Dung Beetles; over
60 species have been described, chiefly by Macleay, 1864–1887–1888, and
Harold 1869.
_Onthophagus pentacanthus_ is ¾ inch in length; the male has a large
slender horn rising up from the centre of the head; a curved shorter
one on either side; and a short two-pronged process in the centre of
the thorax, which is finely granulated above, and clothed with reddish
hairs on the under side.
Public-domain text, read in full here on John Shaqi.
Reviews
Reviews
No reviews yet
Be the first to share your thoughts on this work.
Elsewhere in the archive
Join the Discussion
Join the discussion
Sign in to leave a comment or review.
Sign InorCreate an account