PLATE 33.— Insects. 



Figure 



1. Head of Blatta orientalis, from before, a, antennae, cut off; b, epicranium ; c, eyes ; 



d, clypeus ; e, labruni ; g, niaxillae ; h, maxillary palpi ; k, labial palpi. 



2. Head of Blatta orientalis, under portion, a, stipes ; h, palp of maxilla ; i, palpiger ; 



k, palp ; /, mentum; * paraglossa of labium ; m, submentum and gula; x occiput. 



3. Head of Hydrous piceus, under view, a, antennas; c, eye ; e, labrum ; /, mandible ; 



g, maxilla ; h, maxillary palp ; i, ligula ; k, labial palp ; /, mentum ; m, submentum ; 

 . n, gula ; X occiput. 



4. Ocelli of Agrionfulvipes. 



5. Portions of cornea of eye of Acheta domestica. a, with hexagonal, b, with quadran- 



gular facets. 



6. Perpendicular section of part of the eye. c, faceted cornea ; g, ganglionic expansion 



of n, the optic nerve ; r, bacilli arising from the ganglion, surrounded by choroid 

 pigment. 6*, corneal lenses c, with bacilli r ; from eye of a beetle. 



7. Antenna, setaceous (Achetidas, &c). 



8. Antenna, ensiform (Locustidae). 



9. Antenna, filiform (Carabidae). 



10. Antenna, moniliform (Tenebrionidae, &c). a, scapus ; b, pedicella ; c, clavola. 



11. Antenna, serrated (Elateridse). 



12. Antenna, imbricated (Prionidae). 



13. Antenna, pectinated (Lampyridae). 



14. Antenna, bipectinated (Bombycidae). 



15. Antenna, flabellate (Elateridae). 



16. Antenna, clavate (Coleoptera). 



17. Antenna, capitate (Coleoptera). 



18. Antenna, lamellate and perfoliate (Melolontha). a, scapus; b, pedicella; c, clavola; 



d, lamella?. 



19. Antenna of Globaria. a, scapus; b, pedicella; e, clavola; d, capitulum. 



20. Antenna, plumose (Muscidae). 



21. Antenna, plumose (Cule.v pijnens, male). 



22. Trophi of Blatta orientalis. a, labrum ; b b, mandibles ; c, maxillae (f lacinia, * galea) ; 



d, internal tongue ; e, labium. 



23. Tongue of cricket (AcJieta domestica). a, b, c, parts of a fibre more magnified. 



24. Head of mason-bee (Anthophora retusa), front view, a, antenna ; b, ocelli ; c, eye ; 



d, clypeus ; e, labrum ; /, mandible ; g, maxilla ; h, its palp ; i, palpiger or part of 

 the ligula; k, labial palp; * ligula, commonly called the tongue ; x, paraglnssne. 



25. Maxillae and labium of honey-bee (Apis mcllifica). g, maxilla ; h, its palp ; k, labial 



palp ; /, mentum ; * ligula, commonly called the tongue. 



26. Trophi of water-scorpion (Nepa cincrea). * lingua ; /, mandibles ; g, maxilla ; i, 



labium. 



27. Trophi of bug (Cime.v lectidarius). a, mandibles united; b, maxillae; the median 



organ is the labium. 



28. Antlia of red admiral butterfly ( Vanessa atalanfa). a, separate papilla ; b, end of antlia 



extended; c, transverse section of antlia near its root ; *t tracheae ; t tube ; a, entire 

 organ with two maxillae slightly separated at the end ; e, tooth ; /, section near (lie 

 end, showing the position of the papillae *, and the canal X . 



29. Proboscis of the blow-fly (Musca vomitoria). a, maxillary palpi ; c, lobes of labium. 



29 a, portion of margin more magnified. 



30. Trophi of female gnat (Culex jripiens). a, antennae ; d, tongue; e, labrum ; //, man- 



dibles ; g g, maxillae ; i, labium. 



31. Setae of the same, more magnified, d, tongue ; e, labrum ; /, mandible ; g, maxilla. 



32. Trophi of flea (Pidex irritans). d, labrum ; /, mandibles or lancets ; g, maxilla ; //, 



maxillary palpi ; k, sheaths corresponding to labial palpi. 



33. Trophi of flea, more magnified, d, labrum ;/, end of mandible ; k, sheath ; I, labium ; 



in, mentum. 



