Urticating: nettling; applied to specialized hairs or processes on the bodies of certain caterpillars, which cause a stinging or burning sensation on the skin. Ustulatus: scorched: applied to a maculation that has the appearance of having been burned in. Uterus: the vaginal portion of oviduct: the sometimes enlarged portion of the vagina at junction of the oviducts: = calyx, q.v. Uterus masculinus: a pouch or sac into which the ductus ejaculatorius opens in the Symphyla. Utriculi breviores: small vesicular sacs connected with the seminal vesicles in crickets and some other insects. Utriculi majores: large vesicular sacs or tubular structures connected with the seminal vesicles in crickets and some other insects. Utriculus: a little bag or hollow vesicle. V Vacuolate: with vacuoles or small cavities, empty or filled with a watery fluid. Vagina: the tubular structure formed by the union of the oviducts in the female, opening externally to admit the passage of the egg to the ovipositor: receives the penis of the male in copulation and is sometimes called oviduct: "every part, the office of which is to cover, protect or defend the tongue": "the bivalve coriaceous sheath or cover of the spicula": generally, a sheath. Vaginata: sheathed: an obsolete ordinal term for Coleoptera. Vaginate: inclosed in a bivalved sheath. Vagus: sympathetic nervous system; q.v. Valgate: enlarged at bottom: club-footed. Valve or Valvulae: the expanded plate-like galea of the maxilla in many Hymenoptera. Valve: a small, transverse or triangular piece behind the last full ventral segment, at base of plates in male Jassidae and allies. Valves: in Orthoptera, the corneous pieces of the ovipositor:= corniculi in Lepidoptera, sometimes used to = harpes; q.v. Valvula = vagina in its application to Dipterous mouth parts. Valvulae: in Hymenoptera, branches of the genital forceps of male. Valvular: when two parts join so as to form a valve between them. Valvular process: in Odonata, a slender, unjointed process at the apex of each genital valve. Valvule: any small, valve-like process. Variation: a departure in color or form, from the normal: the sum of the departures from a mean type of any species: it is continuous when there is no break between the extremes; discontinuous when there are gaps without intermediate forms. Variety: any departure from the normal type of a species which, while retaining the specific characters, is yet recognizably different because of climatic, seasonal or other influences; may occur with the type form or as a geographical race. Variola: a deep, rounded impression with defined edges. Variolate -ose: with large, rounded impressions like pock-marks. Vas deferens: = vasa deferentia, q.v. Vasa deferentia: tubes from the seminal vesicles or testes of each side, which usually unite into a single ductus ejaculatorius; q.v. Vasa varicosa: the malpighian tubules. Vascular: relating to the blood-vessels or circulatory system.