Abstract
This paper, first of a series on larvae of defoliating inserts, deals with external characters of Selidosema suavis (Butler), a lepidopterous defoliator which is common on exotic conifer species grown in this country. The characters are given by nstars, and an attempt is made to show how the setal pattern changes during larval development. This setal pattern is, so far as is known, characteristic of this species. Lists of host plants and localities (private plantations and State exotic forests) are given.