Insect morphology least three different positions: prognathous, opisthognathous, and hypognathous. In species with prognathous articulation, the head is positioned vertically aligned with the body, such as species of Formicidae; while in a hypognathous type, the head is aligned horizontally adjacent to the body. An opisthognathous head is positioned diagonally, such as species of Blattodea and some Coleoptera. The mouthparts vary greatly between insects of different orders, but the two main functional groups are mandibulate and haustellate. Haustellate mouthparts are used for sucking liquids and can be further classified by the presence of stylets, which include piercing-sucking, sponging, and siphoning. The stylets are
RID Insect Repellent RID Insect Repellent RID is an Australian brand of personal insect repellent sold and distributed in Australia, New Zealand, worldwide and online. It was the first insect repellent invented in Australia, in 1956. It is applied topically to exposed skin or clothing to repel mosquitoes, sandflies, midges, flies, fleas, ticks, head lice, mites and other insect pests, as well as leeches. RID is available in a variety of packsizes such as aerosols creams, and pump sprays. It is the only major brand of personal insect repellent that is Australian-made and -owned, and has been in production for over 57 years.