Female macropterous or micropterous; body size variable up to about 4mm in length; colour dark brown, tarsi paler; antennal segment III and basal parts of IV & V yellow; fore wings pale to weakly shaded with dark median line. Head longer than wide, scarcely prolonged in front of eyes; 1 pair of setae close together between posterior ocelli; 1 pair of long setae just behind eyes; maxillary stylets wide apart and V-shaped in head. Antennae 8-segmented, segments III & IV sub-equal in length, III with 2 sensoria, IV with 4 sensoria. Fore tarsus without tooth. Fore wing broad, parallel sided, with about 15 duplicated cilia on posterior margin. Pelta with slender lateral wings; tergites II–VII each with 1 pair of sigmoid wing-retaining setae; tergite IX setae not as long as tube.
Male macropterous or micropterous; similar to female, but large males with fore femora swollen and L-shaped, fore tarsus with stout tooth.
The genus Nesothripsincludes 28 species, mainly from Australia, New Zealand and the Pacific region. The genus is closely related to Carientothrips, a genus which also has many species in the same part of the world. A key to 14 species in this genus was provided by (Mound 1974b), but N. propinquus and N. lativentris are both variable in structure, within and between sexes (Mound, 1974a). Large males have unusually large L-shaped fore femora, although small males and females have normal fore femora; this structural variation suggests that there is some sort of male/male interaction and fighting over resources.
Nesothrips lativentris (Karny)
Producing colonies on dead fronds of coconut palms, but also on dead branches. Dispersing winged adults sometimes fly into crops.
Feeding on fungal spores.
Probably originally from the Pacific area.
Widespread in tropical countries, and a potential immigrant to California.