Objective To ascertain the external morphology of adult female Liposcelis bostrychophila. Methods Direct microscopy was used to isolate the pests from infested samples of Radix Astragali(an ingredient of Chinese medicine).The specimens were gently rinsed in physiological saline,fixed in 2.5% glutaraldehyde,and observed under a scanning electron microscope(SEM)after drying at the critical point. Results Observations revealed that adult female L.bostrychophila measured approximately 1 000-1 300μm in length.Th...