Rotula: a small round segment sometimes present between the joints of antenna; and palpi: = torquillus. Rotule: the trochantine. Rotundate: rounded: in the form of a circle or segment of a circle: without angles: said of margins when they pass gradually into each other and do not form an angle at their point of junction. Royal jelly: the food supplied to bee larva that develop into queens. Royal pairs or Royalties: the sexually active males and females of social insects. Ruben: red, approaching carmine [alizar crimson]. Rubescent: reddish or becoming red. Rubiginose: a rusty red [dragon's blood, but brighter]. Rubinous: ruby red: like the eye of a house fly. Rudiment -any: the beginning of any structure or part before it has developed. Rufescent: reddish. Rufous: brick-red [chronic yellow + dragon's blood]. Ruga, Rugulae: a wrinkle; small wrinkles. Rugose -ous: wrinkled: with irregular waved elevated lines. Rugulose -ous; minutely wrinkled. Runcinate: notched: cut into several transverse acute segments which point backward. Ruptor ovi: = egg burster; q.v. Rutilous: a shining bronze red. S Sabulose: sandy or gritty. Sac: in Coccidae, the separate cottony envelope secreted by many species. Saccate: gibbous or inflated toward one end. Saccule: a little sac or pouch. Saccus: a lobe of ventral plate of 9th segment in female Lepidoptera. Saddle: the chitinous plate on the anal siphon of Culicid larvae. Sagitta: arrow-like spots on the wings of Lepidoptera and other insects. Sagittae: the inner pair of forceps in male genitalia of aculeate Hymenoptera: see stipites. Sagittal: equivalent to longitudinal. Sagittal plane: the longitudinal vertical plane which divides an animal into right and left halves. Sagittate: shaped like an arrow head: elongate triangular. Salient: projecting; jutting out. Saliva: the secretion of the salivary glands that moistens and begins the digestion of the food. Salivary glands: glands that open into the mouth or at the beginning of the alimentary canal, secreting a digestive, irritant or viscid material. Salivary receptacle: a small cavity above the opening of the salivary duct, between labium and hypopharynx. Salivary pump: applied to the chitinous, cup-like structure at the base of the labial stylets of piercing Diptera; e.g. mosquitoes. Saltatoria: that series of Orthoptera in which the posterior legs are formed for jumping. Saltatorial or Saltatory: formed for jumping or leaping: a posterior femur when much enlarged and dilated. Saltatory appendage: in Collembola = furcula; q.v. Sanguineous -eus: red like arterial blood [crimson lake]. Sanguinolent: bloody; in color or appearance. Sapphyrinus: sapphire blue [French blue]. Sarcolemma: the elastic covering of the striated muscular fibres. Sarothrum: the basal joint of posterior tarsus in pollen gatherers: see metatarsus. Saturate: deeply or strongly marked; in a color, means intense.