makes up 1 to 2% of the entire colony. The soldiers are not capable of feeding themselves and rely on the worker termites to provide them with regurgitated food. Soldiers have been found to protect alates as they begin to leave the nest. Perhaps correspondingly, soldiers populations reach their highest in the Spring as temperatures increase. Reproductive caste Immature termites on the sexual, or reproductive, line are called nymphs and can be distinguished from workers by the presence of wing buds. Under natural conditions, the work that they do in the nest is negligible compared to that done by workers. They can feed themselves, but there is debate over how long (over how many instars) they retain this ability. Alates (from the Latin ālātus, "having wings") are winged, sexually mature adults that are capable of dispersal and outbreeding. In R. flavipes, they are 8.5-10mm in length to the tips of their wings and have compound eyes, ocelli, and a dark brown to black fully sclerotized cuticle. As the species name suggests (flāvī, "yellow" + pēs, "foot"), the tarsi are yellowish. To distinguish R. flavipes from similar species (at least in the United States), the position of the ocelli can be used: looking at the head from the side, the distance between the ocellus and the nearest compound eye is at least as large as the diameter of the ocellus. Alates always develop from nymphs, with the last nymphal stage characterised by particularly long wing buds. After leaving their nests and swarming, male and female alates pair, shed their wings, begin excavating a new nest, and mate. From this point onward, they are called kings and queens, dealates, or primary reproductives. Secondary reproductives, or neotenics, develop from either the reproductive line (brachypterous neotenics) or, in rare cases, the worker line (ergatoids). Ergatoids are the only members of the reproductive caste that have neither wing buds nor wings. Like workers, soldiers, and nymphs, they are eyeless. Ergatoids are seldom found in nature. Brachypterous neotenics, which are common in the French population of R. flavipes (formerly R. santonensis), and possibly other populations as well, develop from nymphs via a nymph-like pre-brachypterous neotenic stage. They can be distinguished from nymphs by their shorter wing buds (brachy-, "short" + -pterous, "having wings"), darker pigmentation, slight sclerotization, and longer abdomens. Like alates, brachypterous neotenics also have compound eyes and ocelli. Female neotenics lay eggs at a