Trogiidae

These psocids are brachypterous, but none are wingless; the wings may be small and do not have veins. They are found in a variety of habitats, including with household materials, and commercial food facilities. Lepinotus patruelis occurs in low numbers in houses in the USA, the UK, and continental Europe throughout the year. Cerobasis annulata (Fig. i5.2d) occurs in houses in Europe and North America.

Larger pale trogiid, Trogium pulsatorium (Fig. I5.2i) Wings are uniform yellowish brown, and the frons has a dark longitudinal line. This species occurs in low numbers in houses in the USA, the UK, and Europe throughout the year.

Reticulate-winged trogiid, Lepinotus reticulatus (Fig. 15.3a, b)

The small, rounded wings have a reticulated pattern when viewed under magnification; the head is uniform yellowish brown. This species is cosmopolitan and is usually found in outdoor habitats, but it is common in stored grain in the USA.

Other Trogiidae Lepinotus inquilinus is common in houses in Europe, North America, Africa, and Madagascar. L. patruelis (Fig. 15.3c) is common in houses in central Europe, and may have been introduced into the USA.

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