THE IMMATURE STAGES OF LYGAEIDAE (HEMIPTERA: HETEROPTERA) OF SOUTHWEST AUSTRALIA*

Descriptions are given of the nymphs of 20 species (75 nymphal instars) of southwest Australian Lygaeidae together with descriptions of the eggs of 8 species. A key is given to separate the 5th instar nymphs and a discussion of characters that should prove valuable in the recognition of nymphs from the area that are not yet associated with adults. Dorsal views are given of the nymphs of 8 species.