PLATE XIII. 



HYDROMETRA MARTINI. 



Fig. 1. Second instar nymph. 



Fig. 2. Third instar nymph. 



Fig. 3. Fourth instar nymph. 



Fig. 4. Fifth instar nymph. 



Fig. 5. First instar nymph. 



Fig. 6. Egg of Hydrometra martini. 



Fig 7. Hatching Hydrometra. H., hatching device on post-natal 

 molt; a, coiled stylets; c, labrum; h, beak; d, antenna; e, legs. 



Fig. 8. Ventral view of abdomen of male Hydrovietra martini 

 Fig. 9. Side view^ of same. 



Fig. 10. Hatching Hydrometra. Note the hatching device between 

 the eyes. 



Fig. 11. Foot of Hydrometra. 



Fig. 12. Side view above. Dorsal view below of Hydrometra australis. 



Fig. 13. The same for H. martini, after Bueno. 



Fig. 14. Female Hydrometra, ventral view. 



Fig. 15. Ventral view of female abdomen. Cleared in cedar oil. 

 Shows egg. 



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