TABLE OF THE PLATES. 



INSECTA. 



Plate 1 Fi-^. ].— Spiracle of Okyctes nasicorms, teen from ihc front a. a.— 

 The projecting margui. i, 6.— Hoaiy plates, which term its 



FW. '2.— ThJ^same, seen from the side, a.— Projecting margin b, h.— 

 " The separated integument in the vicinity of the spiracle.^ c, c. 



—Posterior projecting margin of the spiracle, d, d.—Thc two 

 hornv triangles, which lie on one side of the main stem of the 

 trachea, which join at *, and are moved by the broad muscle, 

 g f f f\ — Branches of the trachem. 



Fia. 3.— The same, from beneath. «, a.— External projecting margin. 

 b /^— Separated iutegiimont. c— Spot where the apex ol the 

 lower triangle articulates with the margin of the spiracle that 

 projects inwardly. (/.—The lower horny triangle. /;/,/•— 

 Stems of the tiachcse. 



Fit'. 4.— Spiracle of the larva of Cetonia ai p.ata. o, o.— Ihe external 

 darklv-coloured margin, which is decorated with paler ellii.lical 

 spots.' b, 6.— The central paler horny plate, c— Margin of 

 the true aperture, rf, (/.—Branches of trachea?. 



Pi". 5.— Last abdominal segment, with the ovipositor A, of Siuex jlven- 

 ° ci-s. B,B.— Lateral margins of the last largest segment. 



Fig. 6.— Apex of the ab.lomen, from the side. The ovipositor, b, projects 

 from the two valves, a. ,. j i j 



Fi-'. 7.— Apex of the ovipositor, seen from above, c— The divided dentate 

 apex of the sheath, r/, </.— The two dentate seta; within the 

 sheath. , . rr.i 



Fig. 8.— The ovipositor, from the side, c— The upper channel, rf.— Ihe 

 single lower seta. 



Fig. 0.— From beneath, c, r.— Sheath, d, (/.— Sclce. 



Fig. 10.— One seta, to exhibit the shape of the teeth upon it. ^ 



Fig. 1 1 .—Transverse section of the ovipositor. a, a.— The extptnal 

 valves, c— The sheath, d, </.- The set2e. e.— Central tree 

 channel. 



Fi-. 12.— Apex of the ovipositor, a.— The upper channel, i.— The line 



j'ig 13.— Section of the mere ovipositor, a.— Channel, i.— Seta. c. 



— Canal. 

 I.'ijr. 14. — Section of the ovipositor, with the valves, a. — Channel, b.— 



Seta, c, c. — Valves, e. — Canal. 

 Fig. 15. — Last bent segment of an ovipositor of Cymps QVEiuiroMA, with 



the two hairy processes originating from the internal surface. 

 Fig. 16.- The ovipositor, n, a.— Valves, b, /..—External channel of the 



seta;, c. — Central finer seta. 

 Fig. 17. — The external, b, b, and the central seta, r, alone. 

 Fig. 18.— Section, a, a.— Valves, b, /».— External seta;, c— Central 



one. 



Plate 5. Fig. 1.— United testes of Pontia uiiASsic^K. 

 Fig. 2. — Testes of Lihelhi.a, Suckow. 

 Fig. 3. — Testes of Ai'UUoi'Hoi'.A si'imakai. 

 -p\Z. 1. — Testes of Tuiplla cuocata, Suckuw. 

 Fig. 5. — Testes of Ranatra linuai'.i.s. 

 Fig. 6. — Half of the poison vessel of Apis mei-i.ikica. 

 Fig. 7.— Testes of Dytiscls MAUGiNALis. a.— Large knob. /•.— Small 



knob of the dnct. 

 Fig. 7. 6. — Testes of Silpha obsclra, L. Duf. 

 Fig. 8. — Te.'tes of Hycrophili s picEis, Suckow. 

 Fig. 9.— Testes of Ticp.hode.s, Suckow. 

 Fig. 10.— Testes of Locl^ta v lu idissim a. 

 Fig. 11.— Testes of SxAniYHNL^, L Dut. 



