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Psyche 
[Vol. 87 
Figure 7. Longitudinal section (2 u thick) through the glandular area of the sixth 
gastral sternite of P. fuscatus. Anterior is to the right. GC= glandular cells; 
E=epidermis; IM=intersegmental membrane; AT=adipose tissue. Figure 8. Longi¬ 
tudinal section (2 /U thick)'through the glandular area of the sixth gastral sternite of P. 
canadensis. Anterior is to the right. GC=glandular cells; E=epidermis; IM=interseg- 
mental membrane; AT=adipose tissue. 
the sides of the hyaline area and brush. Hermann and Dirks state that 
gland cells “extend beneath most of the integumental surface upon 
which the sternal brush is found” (p. 6), although their figures do not 
document this statement. Turillazzi (1979) showed clearly that in P. 
gallicus (L.) and P. foederatus (Kohl) the class 3 gland cells of sternite 
6 form two lateral clusters. 
Hermann and Dirks (1974) found that the class 3 cells in P. 
annularis pupae were close packed and polygonal. Landolt and Akre 
(1979) argued that this is the undeveloped condition, and that the 
cells of active adult glands are globose. Our sections of active adult 
glands of P. fuscatus and P. canadensis clearly show these cells to be 
