EXPLANATION OF THE PLATE. 



Figure}. Female of the natural size, b, The ovipositor. 



Fig. 2. Male of the natural size, a, a, Scales covering the membranes 



of the large cavities 



Fig. 3. Side view of the natural size. 

 fig. 4. 



Fig. 5. 



with the excavations made by the female (a, a, a, a, , a,) ; 6, a 

 part of the wood cut away so show the situation of the eggs. 



fig. 6. An egg magnified 1000 times. 



Fig. 7. A young insect just from the egg, magnified 1000 times. 



fig. 8. Ovipositor, magnified 10 times, to show the saw teeth of the 

 edges, (a,) and rasps of the blade. 



Fig. 9. Parts of the ovipositor separated and magnified, showing the 

 form of the saws and rasps, (a,) and of the oviduct, b. 



Fig. 10. The Rostrum or Snout magnified, to show the capillaries, (a,) 

 slightly protruded. 



Fig. 11. A section of the chest of the male at the upper ring, showing 

 the internal structure, and the external musical membranes, or 

 drums, a, a, The posterior walls of the large cavities within the 

 chest, being white silky membranes. 6, b, The external musical 

 membranes or drums, c, Two bundles of muscular fibres, con- 

 nected together at the top, and to the sides of the chest at the 

 bottom of each, d, The cavity of the chest, spanned by the two 

 bundles of muscular fibres. 



ERRATA. 



Page 1 . For Mosse, read Moses. 



" 12. For of fasciculi, read of the fascicule. 



" 17. For hybirnating, read hybcrnating. 



" 22. For Thycides, read Thyoides. 



" 24. For grass, read gross. 



M85B04 



