143 SUBFAMILY LEIOBUNINAE Leiobunum rotundum (Latreille) National status Common County status Essex Common Frequency Ratio 2.1 Tetrad Percentage 8.6 Tetrad Frequency 27.1 Monad Frequency 21.9 Distribution Widely distributed and common in the county. Habitat and Ecology Widespread in a variety of habitats but most records are from woodlands, in leaf litter, in the field layer, on foliage or tree trunks. Also recorded from hedges, scrub, grassland, heathland and allotments. Adults recorded from the middle of June to December, with a peak in August and September. Threats Not threatened. Leiobunum blackwalli Meade National status Common County status Essex Common Frequency Ratio 1.7 Tetrad Percentage 7.3 Tetrad Frequency 22.9 Monad Frequency 18.3 Distribution Widely distributed and frequent in the county but apparently less common than L. rotundum. Habitat and Ecology Widespread in a variety of habitats including woodland where it has been recorded on foliage and in the ground and field layers, hedges, scrub, herbage, heathland, marshes and dykes. Adults recorded from the end of June to November, with a peak between August and October. Threats Not threatened. Essex Naturalist (New Series) 16 (1999)