Y Iii Ordkr Arciiakogn

_ contains 2 families and 350 species.

These primitive, wingless insects look luimp-hacked when seen from the side. I hey have simple mouthparts, three ocelli, and large (compound) eyes that touch each other on top of the head. At the end of the abdomen arc three long tails, the middle one being the longest. On the underside of the abdomen there are small projections, called styles, which help bristletails move over steep surfaces more easily.

Bristletails are amctabolous: they continue molting throughout their lives. Males deposit a sperm packet that is picked up by the female's genitalia. Small batches of eggs are laid in cracks and crevices, and the young may take up to two years to reach sexual maturity.

hump-backed apt large thoracic segments three pairs of thoracic legs

0rder ARCIIAKOGNATIIA

Family MACIIIUDAK

No. of species 250

body covered with scales drab camouflage coloring

I'l lKOIill ,s MARIIIMI s is a drably eolored bristlctail that is common along rocky shorelines in the Northern I lemisphcrc. When disturbed, it jumps a little way in the air by flicking its abdomen against the rock.

Jumping kkistlktails

These elongate insects are covered with patterns of drab brown or dark gray scales. Many run rapidly and can also jump hence the common name.

• 1.11-1 CYCLE Kggs are laid in small batches in cracks and crevices, and the young take about two years to reach adulthood. Jumping bristletails feed on lichen, algae, and plant debris.

• ()<:<:IIRKKNCI Worldwide. In grassland, in wooded or coastal areas, under stones, and in leaf litter and decaying vegetable matter.

hump-backed apt large thoracic segments three pairs of thoracic legs

A Pb TROMl s sn :< :11s are found in coastal areas, mainly above the high-tide mark.

SlLVERFISH

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