Species diversity and density of oribatid mites (Acari: Oribatida) was examined in northern Vietnam in order to investigate how they relate to soil and habitat type, and whether they can be used as bioindicators of these factors. Species diversity and population densities are clearly related to soil and habitat type, and can be used as bioindicators of agricultural intensification and soil types. Scrub habitat can allow the re-establishment of the soil oribatid community. Among 98 oribatid species identified belonging to 34 families and 57 genera, three can be indicated as the most widespread and most persistent species, namely Tectocepheus velatus (Michael, 1880), Scheloribates praeincisus (Berlese, 1916) and Lamellobates ocularis Jeleva & Vu 1987. They can be considered as bioindicators of disturbed soil ecosystems

The leafhopper genus Sylhetia Ahmed (1972) is reported for the first time from China and redescribed, and a newly record species, Sylhetia spinata Mathew & Ramakrishnan (2002), from Yunnan Province, China, is redescribed and illustrated. A key to worldwide male species of the genus is provided.

Timberlakena Pate (1939) is reviewed. The subgenera Mohavena Pate (1939), Riparena Pate (1939) and Timberlakena are raised to generic rank and redescribed. Relationships between the three genera are discussed. Ten new species are described: Mohavena bajaensis, M. emmarieae, M. ericalleni, M. utahensis, M. villegasi, Riparena maculifrons, Timberlakena alboclypeata, T. eburnea, T. hirsuta and T. vitellifrons. A new key to the genera of Ammoplanina and keys to the species of Mohavena, Riparena, and Timberlakena are provided. Faces of male and female specimens and forewing venation of each species are illustrated, as well as a habitus photograph of two species of Mohavena.

In surveys of apple-production areas east of the Cascade Mountains of Washington, broadleaf plantain, Plantago major Linnaeus (Plantaginaceae) was common throughout while narrowleaf plantain, P. lanceolata Linnaeus, was most common south of Orondo, Douglas County (47.7° latitude). Rosy apple aphid was the most common aphid on these two herbaceous plants; however, colonies were scarce, on only 19% of broadleaf and 11% of narrowleaf plantain samples. Colonies were also generally small, fewer than 25 individuals. Adult rosy apple aphid was collected on plantain from late May through October. Adults reached their highest levels in July before declining in August. Colonies increased again in September and October. Relatively few predators (mainly syrphids) and parasitoids (two species of Aphidius) were found on plantain. On apple, the most common predators were the mirid Campylomma verbasci (Meyer-Dür), earwigs, coccinellids, cecidomyiids and syrphids; the most common primary parasitoid was Lysiphlebus testaceipes (Cresson). Secondary or hyperparasitoids consistently outnumbered the primary parasitoids. Plantains growing outside of orchards but within 1 km of apple trees had the highest incidence of RAA infestation. The potential for management of RAA on its summer hosts is discussed.

A new genus Pangia of the tribe Serangiini is described from China, with Serangiella vietnamica Hoàng, 1978 as type species. This species constitutes a new combination within Pangia. A new species is added, P. lamelliforma, sp. nov. The new genus and species are described and illustrated in detail. A distribution map to the species is provided.