r sclerite: small sclerite in the membrane connecting the head
with the thorax: see cervical sclerite.

Jugulum: that sclerite just behind the sub-mentum; =gula: that cavity
of the posterior part of the head to which the neck is annexed: the
lateral and under parts of the prothorax.

Jugum: in certain Lepidoptera and Trichoptera, a lobe or process at
the base of primaries, overlapping secondaries and holding the two
together in flight.

K

Katabolic: the destructive change from animal tissue to waste product:
see anabolic.

Keel: an elevated ridge or carina.

Kermesinus: dark red, with much blue [purple lake].

Key: a tabular or other arrangement of species, genera or other
classification according to characters that serve to identify them.

Kidney-shaped: like a kidney in outline; convex on one long side,
concave on the other, the ends evenly and somewhat obtusely
rounded: bean-shaped.

Knee: the point of junction of femur and tibia.

L

Labellum -a: the sensitive ridged tip of the mouth structures of certain
Diptera: a prolongation of the labium covering the base of rostrum in
Coleoptera and Hemiptera.

Labial: referring, pertaining or belonging to the labium.

Labial segment: the 7th segment of head = second maxillary segment.

Labial suture: is between labium and mentum.

Labiate: lip-like or having lip-like sutures.

Labipalp: a labial palpus.

Labis: the slender abdominal forceps in some Lepidoptera.

Labium: the lower lip: a compound structure which forms the floor of
the mouth in mandibulate insects, behind the first maxilla and
opposed to the labium; formed by a fusion in embryonic life of
separate right and left maxilla-like halves: in some of its
developments referred to as the tongue.

Labral suture: is between labrum and clypeus.

Labro-frontal lobes: of brain, = trito-cerebrum; q.v.

Labrum: the upper lip; covers the base of the mandible and forms the
roof of the mouth.

Labrum-epipharynx: in the mouth of piercing Diptera is the central
unpaired lancet.

Lac: a mixture of resin, wax and other substances produced by certain
scale insects as a protective covering.

Lacer: a lappet; applied to a margin with irregular, broad and deep
emarginations, leaving lappet-like intervals.

Lacerated: ragged; torn in appearance; see lacer.

Lacinia: the inner lobe of first maxilla, articulated to the stipes,
bearing brushes of hair or spines: a blade: in Diptera, forms a