LIST OF ILLUSTRATIONS. 



FIG. PACE 



1. — Ophiodendrum abietinum on Sertularia abietina 66 



2. — Ricinus of the Pygarg 72 



3. — Caligulus elegans, female : ditto, natural size 73 



4. — Different forms of the Bite of a Leech 110 



5. — Sucker and jaws 110 



6. — Anatomy of Leech 110 



7. — Antenna of Gnat 115 



8. — Gnat, male and female 118 



9, 10. — Lucilia hominivora 120 



11.— Ox-fly 121 



12.— Antenna of Ox -fly 121 



13.— Blue-fly 121 



14.— Flesh-fly 122 



15. — House-fly 122 



16.— Bed-bug 124 



17. — Louse 125 



18. — Louse — Suckers 126 



19.— Ditto— Claw 12 e 



20. — Flea (Pulex irritans) 128 



21. — Itch-mite 131 



22. — Ditto, female — back view 131 



23. — Ditto, male — back view 132 



24. — Geographical water-mite 13g 



25. — Book-mite 10.7 



26. — Chigoe, male _ 1^1 



27. — Ditto, head 141 



28. — Ditto, female ,,, 



••• ... 141 



29.— Phryxus Bathkei ,._ 



' "• ••• ••• ... 145 



