PLATE XXIV. 



BUENOA MARGARITACEA, 



All the figures refer to Buenoa margaritacea unless otherwise stated. 



Fig. 1. Egg removed from the stem, showing the clear exposed area 

 of the egg and its margin of white. 



Fig. 2. Eggs "in situ" in stem of Juncus. 



Fig. 3. A portion of the stem of Juncus removed to the egg in situ. 



Fig. 4. Ventral view of the female, showing the appearance of the 

 ovipositor and the crib formed by the two anterior pairs of legs for the 

 retention of entomostracans. Compare with figure 10. 



Fig. 5. Inner view of the stridular areas on the femur and tibia of 

 the anterior leg of the male, greatly enlarged from figure 6. 



Fig. 6. Inner view of the anterior leg of male, showing the tibial 

 prominence and stridular areas. 



Fig. 7. Eggs of Notonecta undulata glued to the stem of aquatic plant. 

 Drawn from a photograph. Plate from Ento. News, XXVIII. 



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