285 

 Explanation of Plate VTI. 



Fig. 1. Male Hydropedeticvs, the riglit wing-cover and wing 

 extended x 3. 



2. Left wing-cover of the male. The dorsal and lateral areas, 



which do not lie in the same plane, are drawn separately, 

 a clear space intervening. 



3. Eight wing-cover of the female, the dorsal and lateral 



areas separated. 



4. Tibia and tarsus of hind leg, showing the adaptation for 



leaping on water. Three of the spines are foreshortened, 

 and their setre are not shown. 



5. Auditory fenestras of fore tibia, superposed. 



6. Immature Hiidropedetkus (larva) x 3. 



Explanation of Plate VIII. 



Fig. 7. Head of Hijdfopeletirns with antennae, eyes and mouth- 

 parts. 



8. Edge of mandible, showing the cutting ridges alternating 



with molar surfaces. 



9. Maxillae and labium, seen from behind. 



10. Middle tarsal joint of mid leg. To the right is seen the 



thin chitinous plate and the fringe of .setae. 



11. The same part of the hind leg, with the smaller serrated 



spur of tlie basal joint. 



12. The larger serrated spur of the basal tarsal joint (hind leg). 



Only the bases of the long setae on the outer margin are 

 shown. 



1 3. Fore leg with auditory fenestra. 



14. Mid leg. 



15. Extremity of female abdomen in side-view, with one of the 



cerci and the ovipositor. A spiracle is seen between the 

 dorsal and ventral plates. 



