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ILLINOIS BIOLOGICAL MONOGRAPHS 



[232 



ps Pseudotrachea 



ps.th Pseudotracheal thickening 



pt Ptilinum 



r.d.a Rudimentary dorsal arms of the 



tentorium 



r.p.a Rudimentary posterior arms of 



the tentorium 



s Suture 



s.b Salivary bulb 



sc Scape 



s.d Salivary duct 



s.e.s Stem of the epicranial suture 



si Sigma (sclerite) 



so Sense organ 



s.s Secondary suture 



st Stipes, st-i and st-2 ectal part, 



st-e ental part 



su Submentum 



su.me Submentum and mentum 



t Tentorium 



tee Teeth-like structures 



th Thickening 



the Theca 



to Torma or tormae 



t.th Tentorial thickening 



V Vertex 



