| S1 | | Abdominal terga 3-4 not with a posterior membranous band (at least in the middle) (Section I) |
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| S2 | | Abdominal terga 3-4 with a posterior membranous band (Section II) |
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| 1 - | | Posterior part of abdomen darkened (abd. 8-10)
Liposcelis brunnea < click for details > < large image >
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| - | | Abdominal terga 5-8 clearly annulated (anterior portions darker - sclerotized)
Liposcelis decolor < click for details > < large image >
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| - | | Abdominal terga with purplish markings on the side (fading in the middle)
Liposcelis entomophila < click for details > < large image >
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| - | | Abdominal terga 3-8 have an obvious sclerotized strip along anterior margin
Liposcelis fusciceps < click for details > < large image >
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| 2 - | | Color white to pale yellow; head and thorax darker than abdomen
Liposcelis paeta < click for details > < large image >
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| - | | Sclerotized areas of body pale to medium brown; head and thorax darker than abdomen
Liposcelis bostrychophila < click for details > < large image >
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| - | | Sclerotized areas grayish brown; antennae and palpi paler
Liposcelis corrodens < click for details > < large image >
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Psocid ID: Introduction | Picture Key (G. Opit, J. Throne, and K. Friesen)