Hyidiothrips Hood

(Fig. 65)

Hyidiothrips Hood, 1938: 414 . Type species: Hyidiothrips atomarius Hood, by monotypy.

This genus of 10 minute species is known from various sites around the tropics, with the species usually taken from leaf-litter. Okajima (1995a) described one species from west Malaysia and another from southern Sulawesi, Indonesia, and three species are recorded from Southern China.

Diagnosis: Body minute, laterally flattened (Fig. 65); head a little longer than wide, distinctly produced in front of eyes; eyes normal, micropterae with number of ommatidia greatly reduced; postocular setae welldeveloped; stylets usually short, retracted into mouth-cone; antennae 7-segmented, III and IV fused to one enlarged segment bearing 2 slender apical sensoria; pronotum with 4 pairs of well-developed setae, am displaced posterolaterally, ml reduced, aa, epim and pa usually with apices expanded and asymmetric, notopleural sutures incomplete; basantra present; mesopresternum absent; sternopleural sutures absent; fore tarsal tooth absent in both sexes; fore wings weak, without duplicated cilia; pelta usually divided into several plates; tergites II–VII with 1 pair of wing-retaining setae; tube shorter than head, anal setae longer than tube.