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Spiders, left side: 1) Long-jawed spider (Tetragnatha extensa), male, eye position (a); 2) Diving bell spider (Argyroneta aquatica), nest (a), eye position (b); 3) Domestic house spider (Tegenaria domestica), male (left), female (right), eye position (a); 4) Crab spider (Xysticus cristatus, or Thomisus viaticus), male (a), female (b), eye position (c). Right side: 1) Garden Spider (Araneus diadematus, or Epeira diadema), female (a), male (b), eye position (c), toe-poke of the domestic house spider (d), left jaw with poison gland (e); 2) Enoplognatha ovata (or Theridium redimitum), eggs (a), eye position (b); 3) House pseudoscorpion (Chelifer cancroides); 4) Tarantula (Lycosa tarantula, or Tarantula Apuliae), male; 5) Castor bean tick (Ixodes ricinus), empty female (a), soaked female - belly-side (b), back-side (c); 6) Yellow scorpion (Buthus occitanus), belly-detail with combs and air holes (a); 7) Demodex folliculorum on human hair (enlarged microscopically); 8) Eriophyes vitis (or Phytoptus vitis , enlarged microscopically); 9) Itch mite (Sarcoptes scabiei); 10) Tick (Ixodes reduvius); 11) Cheese mite (Tyrolichus casei, or Tyroglyphus siro); 12) Trombidium holosericeum, belly-side, natural size (a). Wood engravings, published in 1897.