(Xanthomelanodes arcuatus)
Glossary
Arista
A large bristle on the upper side of the third segment of the antenna of a fly.
Calypter
On flies: one of two small membranous lobes at the base of the forewing that covers the haltere. On mosses: A thin cap that covers and protects the capsule and operculum and drops off at maturity.
Costal margin
The leading edge of the forewing of insects.
Femur
On insects and arachnids, the third, largest, most robust segment of the leg, coming immediately before the tibia. On humans, the thigh bone.
Frons
The upper part of an insect’s face, roughly corresponding to the forehead.
Halteres
In flies: a pair of knob-like structures on the thorax representing hind wings that are used for balance.
Ocellus
Simple eye; an eye with a single lens. Plural: ocelli.
Palp
Short for pedipalp. A segmented, finger-like process of an arthropod; one is attached to each maxilla and two are attached to the labium. They function as sense organs in spiders and insects, and as weapons in scorpions. Plural: palpi or palps.
Proboscis
The protruding mouthpart(s) of a sucking insect.
Scutellum
The exoskeletal plate covering the rearward (posterior) part of the middle segment of the thorax in some insects. In Coleoptera, Hemiptera, and Homoptera, the dorsal, often triangular plate behind the pronotum and between the bases of the front wings. In Diptera, the exoskeletal plate between the abdomen and the thorax.
Scutum
The forward (anterior) portion of the middle segment of the thorax (mesonotum) in insects and some arachnids.
Tarsus
On insects, the last two to five subdivisions of the leg, attached to the tibia; the foot. On spiders, the last segment of the leg. Plural: tarsi.
Tibia
The fourth segment of an insect leg, after the femur and before the tarsus (foot). The fifth segment of a spider leg or palp.
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Created: 1/2/2021
Last Updated: