These psocids occur primarily in dry habitats, but some are found on the foliage of conifer trees. Adults have 13-segmented antennae, which lack secondary annulations. The wings extend to the tip of the abdomen or beyond; the wing-spot is constricted at the base, and rounded apically. Lachesilla is a large genus found throughout the world and contains a number of species that occur in habitats such as dead foliage, haystacks, and thatching. L. quercus is a rare species, but it is widely distributed and known from stored products in Europe. L. greeni occurs in outbuildings and may be a domestic species in the UK.

Cosmopolitan grain psocid, Lachesilla pedicularia (Fig. 15.2o)

Adults are 1.5-2.1 mm long. The front wing of the macropterous form is about 1.8 mm long. The body is dark brown, and the

and L. nubilis, are known primarily from outdoor habitats, but also occur with stored grains indoors. The fore wings of these species have distinct spots along the veins and at the apex.

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