PLATE B— continued. 



Fig. 6. — Portion of the saw-like apparatus of Tettigonia 

 viridis. s, s. Tlie saws, which are strongly backed and 

 set with square teeth. The side plates (/,/) are 

 grooved on the flat, and seem in some way to act as 

 rasps, as well as sheaths. The centres of motion, 

 with horny attachments, are seen below, and through 

 these an alternating motion is effected on the saws. 

 I, I. Opposing ligaments. 



Fig. 7. — Eight ova, the contents of the body of an 

 Athjjsanus. They occupied almost the whole cavity of 

 the abdomen. 



Fig. 8. — The stomach of Aphrophora , showing a long 

 tortuous vessel within, and attached to its walls. This 

 long tube exhibits a marked rhythmical action, long 

 after its separation from the body. It ends in a con- 

 voluted tube, which passes to the rectum, and through 

 the anus it pours out the spume in which the insect 

 hides itself; or possibly it also conducts air, secreted 

 from the juices of the body to the same place, to blow 

 the bubbles, so well known, as cuckoo-spits. When 

 this viscus is plunged into weak alcohol, numerous 

 bubbles are disengaged, as if air was held in solution 

 in some fluid contained within the viscus. 



Fig. 9. — Another dissection, from a similar insect. 

 Here the tortuous vessel appears disjointed, and shows, 

 what seems to be, open mouths {p,p). At ir and at t, 

 the pyloral sac is seen studded with nucleated epithelial 

 scales (n)« The sac is charged with alimentary matter. 

 The small duct (o) could not be traced beyond the 

 viscus, and it might be exterior to it. Both these 

 drawings were made direct from the camera-lucida. 



Fig. 10. — Elytron, showing: — a. Costal nervure. 

 b. Cubital, c. Subcubital. d. Supra-marginal, c. Anti- 

 apical. /. Anal. g. Axillary, h. Marginal. /. Limbal. 

 p,p,p. Apical, s. Suture. t,t,t. Transverse nervures. 



