Cupuliform: cup-shaped: like a little cup: = cyathiform.
Cursoria: in Orthoptera, that series in which the legs are formed for running (roaches, etc.).
Cursorial: formed for running.
Curvate: curved.
Curvinervate: wings with the veins distinctly curved, like some Psocidae.
Cusp -is: a pointed process; sometimes at the margin of a wing.
Cuspidate: prickly pointed; ending in a sharp point; with an acuminated point ending in a bristle.
Custodite -us: guarded: a body in an envelope.
Cuticle: the outer skin or skin layer.
Cuticula: = cuticle: specifically applied to the outer or chitinized layer: see epidermis and hypodermis.