Agriculture Reference
In-Depth Information
Fig. 52 Forewing venation of a brown lacewing -
family Hemerobiidae.
Fig.
50 Forewing venation of a powdery lacewing -
family Coniopterygidae.
Fig. 53 Larva of a brown lacewing,
Hemerobius
humulinus -
family Hemerobiidae (x7).
Fig.
51 Larva of a powdery lacewing,
Conwentzia
psociformis -
family Coniopterygidae (xl5).
EXAMPLES:
Coniopteryx tineiformis, Conwent-
zia pineticola, Semidalis aleyrodiformis.
and large, toothed mandibles. Pupation occurs
within a silken cocoon.
2.
Family HEMEROBIIDAE
(brown lacewings)
1. Family CONIOPTERYGIDAE
(powdery lacewings)
Usually small to medium-sized, greyish or
brownish lacewings with moniliform antennae;
wing with numerous cross-veins and the veins
typically bifurcating near the wing margin
(Fig.
52). Eggs without a mucous stalk. Larvae
fusiform, without tubercles; body hairs short and
simple; mandibles untoothed
(Fig.
53).
EXAMPLES:
Eumicromus paganus, Hemerobius
humulinus.
Small, delicate, whitefly-like lacewings with
white, mealy wings; hindwings sometimes ves-
tigial; venation reduced and with few cross-veins,
the veins not bifurcating near the wing margin
(Fig.
50); antennae filiform and many-
segmented; compound eyes large; ocelli absent.
Larvae more or less pyriform, being distinctly
tapered posteriorly; antennae 2-segmented and
hairy; legs long and slender
(Fig.
51).
