Plate I. 



Fig. I. Male of Neohaematopinus sciuropteri (Osborn), 



Fig. 2. Female of Neohaematopinus paciUcus n. sp. 



Fig. 3. Female of Hoplopleura hesperomydis (Osborn). 



Fig. 4. Female of Polyplax auricularis n. sp. 



Fig. 5. Female of Polyplax spinulosa (Burm.). 



