PLATE LXIV 



Figure 1. The alimentary tract of Cimex rotundatus. oes. 

 oesophagus, sl.g'., sl.g"., the cardiac glands, cd., 

 the cardia, or anterior part of the mid-gut. v., 

 valve-like constriction at the posterior end of the 

 cardia. mg., mid-gut. mp.t., Malpighian tubes. 

 Note their low insertion into the gut. rt., rectum, 

 x 10. 



Figure 2. The tubular salivary gland of Landois, after Landois. 



Figure 3. The branched salivary gland of Landois, after Landois. 



Figure 4. The chitinous structures at the distal end of the head 

 of Cimex rotundatus, showing the salivary valve, 

 sl.v., into which opens the salivary duct, sl.d. ch.a., 

 a chitinous ridge produced backwards to the ventral 

 wall, r., the rod of the pump, acting like a piston rod, 

 by means of the muscles, mu. mb., membraneous 

 area anterior to the pharynx, corresponding to the 

 buccal cavity, ph., the pharynx. X 450. 



Figure 5. The pharynx or sucking pump of Conorhinus rubro- 

 fasciatus, seen from the side, from a cleared prepara- 

 tion, h.c., chitin of the head capsule. lr., labrum. 

 oes., oesophagus, emerging from the posterior end of 

 the pump, x 64. 



Figure 6. The salivary pump of Conorhinus, seen from the 

 dorsal aspect in a cleared preparation, si. a., salivary 

 aperture. ch.r., chitinous ridge lying ventral to the 

 pharynx and partly fused with it, which serves for the 

 attachment of the muscles of the pump, sl.d., the 

 point of entry of the salivary duct into the valve, 

 r., the piston rod of the valve, mu., the muscles 

 which draw out the plunger of the pump, x 320. 



Figure 7. The pharynx and salivary apparatus of Cimex rotun- 

 datus. md., mandible, md.b., its basal enlargement, 

 sl.g'., the reniform salivary gland. Other letters as 

 above. Only a part of the oesophagus is shown. 

 X130. 



Figure 8. One side of the terminal filament of the salivary 

 valve of Cimex rotundatus, showing the serrated edge 

 on the dorsal aspect. 



Figure 9. The same, seen from the ventral aspect. 



