128 ProceecUiKjs of t/te Roijal Society of Victoria. 



organs in respect to the exoskeleton. x 3. A 

 anus ; C. A. one of the cpecal organs ; the proven- 

 triculus and other csecum are hidden (see Fig. \a) ; 

 C.R. crop distended ; F.T.C. fore-terminal canal, 

 joining anteriorly with the cteca and posteriorly 

 with M.T.C. the mid-terminal canal ; L. lingua 

 (hypopharynx); L.L. labium; L.P. palpus labii; 

 M. mandible ; M.P. palpus maxillse ; M.T.C. mid- 

 terminal canal, ending a little anterior to the 

 entrance of the duct of the Malpighian tubes ; 

 M.V. Malpighian tubes, only a small number 

 shown, there are two kinds, white and yellow ; 

 0.E.1 fore-gullet; O.E.^ hind-gullet; R. rectum; 

 R.C. rectal glands; S.D.^ common duct of salivary 

 glands ; S.D.^ indicates the junction of the right 

 and left median salivary ducts, that leading from 



* the left-side is cut off a little lower down : — S.R. 



one of the salivary receptacles ; U ureter ; U.L. 

 labrum. 



Fig. \a. — Proventriculus and ci?eca viewed from ventral aspect 

 X 3. A.O. arborescent organs of Dufour (only 

 the ventral pair shown); C.A. caeca; they compose 

 the whole of the middle intestine (mesenteron); 

 G. proventriculus (gizzard). 



Fig. 2. — Longitudinal section of wall of fore-gullet x 650. 

 A radial muscle fibres cut across ; B longitudinal 

 muscle fibres ; C epithelium cell of hypodermis ; 

 D chitinous intinia bordered by teeth which are 

 acutely bent and point behind, seen with their 

 thin edge uppermost. 



Fig. 2a. — An isolated tooth of above with its broad surface 

 uppermost x 650. 



Fig. 3. — Median longitudinal section through the pro\entriculus 

 and mesenteron x 11. CO. csecal organs; F.P.C. 

 a food-pulp channel entering into creca ; F.T.I, 

 fore-terminal intestine ; F.L. a longitudinal infold 

 of the cajcum cut through the face of cells; O.A^. 

 (Esophageal valve — two flaps only show cut 



