3io 
Psyche 
[June 
Fig. 7. S. iubulofaciens (Hingston), closer frontal view of the retreat, 
open. Posterior lip not shaded. 
Fig. 8. S. artifex Simon, schematic representation of a cross section of 
the retreat. Posterior lip of the retreat hangs loose, enclosing mass of eggs 
(Modified from Simon, 1896, pi. 12, fig. 4). 
Size indicators: Figs. 7-8, 5 mm. 
