Abdomen: The posterior part of the three main body
divisions of an insect.
Anterior: Towards the head.
Beak: The mouthpart of a piercing-sucking insect.
(Figure a.)
Cerci: A pair of appendages at the posterior end of
the abdomen. (Figure b.)
Coxal Plates: Flattened structures that extend beyond
the coxa (first leg segment) of the beetle (Figure c.)
Detritus: Organic material in various stages of decomposition.
Dorsal: Towards the top and back.
Elytra: Thickened fore wings. (Figure d.)
Emergent Vegetation: Vegetation that lives in the
water but has parts that grow above the surface of the water.
Epiproct: An appendage above the anus on the dorsal
part of the eleventh abdominal segment (that segment is very small)
(Figure e.)
Eutrification: The process in which oxygen is removed
from the water by the decomposition of large amounts of organic matter.
Filaments: A slender threadlike structure. (Figure
f.)
Head: The anterior part of the three main body divisions
of an insect.
Hemelytron: The fore wing of Hemiptera. (Figure g.)
Labium: The lower lip of the mouth part structures.
(Figures h. and i. showing an example
of a dragonfly nymph's labium which can extend outwards.)
Larva: The second stage of development between egg
and pupae of insects that undergo complete metamorphosis.
Nymph: The second stage of development between egg
and adult of insects that undergo incomplete metamorphosis.
Palpal Lobes: A pair of appendages located at the
anterior end of the prementum (lower lip) of Odonata. They are armed
with hooks, spines, teeth, and raptorial (grasping) setae. (Figure j.)
Palpi: A pair of appendages that border the proboscis
on Culicidae. (Figure k.: the papli on Anopholes
sp. are as long as the proboscis)
Paraprocts: A pair of appendages bordering the anus.
(Figure l.)
Posterior: Towards the rear.
Prementum: The distal or fore part of the labium.
(Figure h.)
Proboscis: Elongated mouthparts.
Prolegs: Fleshy abdominal legs. (Figure m.)
Raptorial: Able to grasp prey.
Submergent Vegetation: Vegetation that grows entirely
beneath the surface of the water.
Tarsi: The last section of the leg, divided into several
segments. (Figure n.)
Thorax: The middle part of the three main body divisions
of an insect.
Tibia: The fourth leg section, between the femur and
the tarsi. (figure o.)
Ventral: Towards the belly or underside.
Voracious: Eating with greediness, ravenous
Wing Pads: The undeveloped wings found on a nymph.
(Figure p.)