 |
simple
(gradual) metamorphosis |
|
winged and wingless species
(click to expand/collapse)
 |
forewing is uniform structure
(slightly thickened or membranous) |
|
hind are membranous |
|
wings are held
roof-like over back |
|
|
mouth is piercing-sucking (sap sucking), arises from
back of head |
|
often protect themselves
with
(click to expand/collapse)
|
froth
(spittle bugs) |
|
woolly threads of wax (Balsam
Woolly Adelgid) |
|
hard or
soft wax shells (scales & lacs) |
|
gall tissue
formed by host plant (Cooley Spruce Gall Adelgid) |
|
|
aphids exude honeydew and are “farmed” by ants |
|
adelgids
are found only on conifers |
|
may
have complex life cycles (alternate
between hosts, alternate generations with sex and no sex, no sex period –
females only – parthenogenesis) |
