1978] 
Valentine & Glorioso — Grooming in Diplura 
199 
of stereotypy. Present literature emphasizes the stereotyped aspects 
of grooming, but it should be obvious that generalizations based on 
highly derivative or primitive orders are not valid for the entire class 
and may be skewed in opposite directions. The order Thysanura 
would be a heuristic study because of the diversity of surface 
textures. There are scaly lepismatids, campodeid-like nicoletiids, 
and sclerotized, non-scaly lepidotrichids. Grooming in these three 
families may further clarify why the degree of stereotypy varies from 
taxon to taxon. 
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