Cryptopentamera: feet 5-jointed, the 4th joint small and concealed.
Cryptotetramera: feet 4-jointed, one of them small and concealed.
Cryptothorax: a supposed thoracic ring between meso- and meta-thorax.
Crypts: minute secretory follicles or cavities: specifically, large gland-like structures between the epithelial cells in chylific ventricle.
Crystalline cone: a conical structure below the cornea, imbedded in pigment cells of the compound eye: also termed Crystalline lens.
Ctenidium: a comb-like structure occurring on any part of an insect.
Cubital: referring or belonging to the cubits.
Cubital cell: the wing area between the cubits and anal vein; in the plural, all the cells bounded anteriorly by the cubits or its branches (Comst.); in Diptera (Schiner), = radial 3 (Comst.), = 3d posterior cell (Loew); in Hymenoptera (Norton), = radial 3, 4 and 5 (Comst.).
Cubital forks: the branching or points of separation of the branches of the cubits.
Cubitus: of Comstock, is the 5th in the series of longitudinal veins extending from base, and usually two branched before reaching outer margin: in Orthoptera; = the internomedian and ulnar: in Neuroptera, a main longitudinal vein next behind the medius and before the anal: the tibia of the anterior leg.
Cuckoo spit: liquid in the form of bubbles produced by members of the family Cercopidae and which often conceals the producer.
Culicifuge: any preparation for driving away gnats or mosquitoes.
Culmen: the longitudinal carina of a caterpillar.
Cultellus: one of the blade-like lancets in piercing flies: = the mandibles of some authors.
Cultrate -iform: shaped like a pruning knife.
Cumulus: a group or heap; as of cells in a developing ovum.
Cuneate, Cuneiform: wedge-shaped; elongate triangular.
Cuneus: Hymenoptera; the small triangular area at the end of the embolium of hemelytra: Odonata, the small triangle of the vertex between the compound eyes.
Cupreous: the metallic red of pure shining copper.
Cupules: the sucker-like processes covering the under surface of the tarsi in male Dytiscidce.
Cupuliform: cup-shaped: like a little cup: = cyathiform.
Cursoria: in Orthoptera, that series in which the legs are formed for running (roaches, etc.).
Curvinervate: wings with the veins distinctly curved, like some Psocidae.