Fig.44 Apterae on Polytrichum and other mosses; (a) ANT VI of Muscaphis musci, (b) Cauda of Muscaphis musci, (c) SIPH of Decorosiphon corynothrix, (d) Front of head of Pseudacaudella rubida, (e) Front of head of Myzodium modestum, (f) SIPH of Pseudacaudella rubida, (g) SIPH of Myzodium modestum, (h) SIPH of Muscaphis escherichi, (i) SIPH of Muscaphis utahensis, (j) SIPH of Muscaphis musci.