PLATE XXIX. 



Fig. 1. — Lateral aspect of mouth parts, labium excepted: /, frons; c, 

 clypeus; lab, labrum; ep, epipharynx; md, mandible; tux, maxilla; 

 mds, mandibular sclerite; mxs, maxillary sclerite; cmx, chitinized 

 plate for muscular attachment; cp, hypopharyngeal lamella; procx, 

 maxillary process; lahi, labium (base); h, hypopharynx; for, fora- 

 men. 



Fig. 2. — Lateral aspect of mouth parts (diagrammatic) : /, frons; ep, 

 epipharynx; s, setse; labi 1, lahi 2, lahi 3, three segments of labium; 

 mestr, mesosternum; p, process of thorax for holding labium; m, mem- 

 brane forming fold between procoxae for labium. 



Fig. 3. — Ventral aspect of mouth parts, labium excepted: /, frons, c, 

 clypeus; lab, labrum; ep, epipharynx; md, mandible; ms, maxillas; 

 cmx, chitinized plate for muscular attachment; cp, hypopharyngeal 

 lamella; mds, mandibular sclerite; mxs, maxillary sclerite; procx, 

 maxillary process. 



Fig. 4. — Ventral aspect of labium: /, frons; c, clypeus; lab, labrum; ep, 

 epipharynx; labi 1, labi 2, labi 3, three segments of labium; b, point 

 where bend occurs. 



Fig. 5. — Dorsal aspect of mouth parts, labium excepted: f, frons; lab, 

 labrum; ep, epipharynx; md, mandible; vix, maxillae; cmx, chitinized 

 plate for muscular attachment; cp, hypopharyngeal lamella; procx, 

 maxillary process; h, hypopharynx; t, tentorium; z, proximal edge of 

 frons; p, pharynx. 



