_ORDERS OF INSECTS._
I. COLEOPTEROUS Have elytra or crustaceous cases covering the wings; and
which, when closed, form a longitudinal division along the middle of the
back, as the _chafer_.
II. HEMIPTEROUS Have four wings, the upper ones partly crustaceous, and
partly membranous; not divided straight down the middle of the back, but
crossed, or incumbent on each other, as the _cock-roach_.
III. LEPIDOPTEROUS Have four wings covered with fine scales, almost like
powder, as the _butterflies_ and _moths_.
IV. NEUROPTEROUS Have four membranous and semi-transparent wings, veined
like net-work; and the tail without a sting, as the _dragon-fly_ and
_ephemera_.
V. HYMENOPTEROUS Have four membranous and semi-transparent wings, veined
like network; and the tail armed with a sting, as the _wasp_ and _bee_.