xii TABLE OF THE PLATES. »*««• ,,*"^^ 



INSECTA. Vol. IV. Page 



Plate 32. No. 2. — Parts of the skeleton of Dytiscus. 



Fig. 1. — Internal portion of the head, a, a. — The two ridges which pro- 

 ceed from the throat and enclose the cerebellum, c. — The 

 tentorium, d. — A band, consisting of two halves, upon which 

 the anterior portion of the cerebellum rests, e, e. — Two 

 hooked processes, which encompass the oisophagus in front of 

 the cerebrum. /",/'. — A horny ridge to which the labrum is 

 attached, g. — The tongue, h. — A horny semicircular bone, 

 to which the tongue is attached, b, b. — The orbits. 



Fi£r. 2. — The prothorax seen from beneath, b, b. — The omia. 



Fig. 3. — The prosternura from behind, a, a. — The jugularia. b, b. — In- 

 ternal processes of the prosternum. 



Fig. 4. — The ornium seen from the surface, b. — The external surface. 

 b*. — The reflexed margin which lies against the surface of the 

 pronotum. 



Fig. 5. — Prosternum from the side. b. — The internal processes. 



Fig. 6.— Coxae, trochanters and femur of the intermediate leg. a. — 

 Audouin's trochantinus. 



Fig. 7. — ^leso and metathorax from above. 



Fig. 8. — The same from beneath 



Fig. 9. — Mesosternum exposed, so as to show its internal processes. E. — 

 The body of the vertebra whence the arches proceed which 

 encompass the nervous cord, b, b, are the transverse pro- 

 cesses, a. — The processus spinosus, consisting of two halves. 



Fig. 10. — Anterior wing of the scapula (D). 



Fig. 11. — Posterior wing of the scapula (D*). b. — The reflexed margin 

 which forms the suture with that of the anterior wing. 



Fig. 12. — The connate coxae seen from the front to exhibit the process 

 springing from them, b, b — The anterior processes, a, a, 

 — The posterior, with their furcate branches**. 



Plate 32. No. 3. — Portions of the skeleton of Buprestis mariana. 



Fig. 1 .— Prothorax from beneath. A, A. — Reflexed margin of the pro- 

 notum. B. — Prosternum. b, b. — The small round plates 

 which correspond to the anterior wings of the scapulae in 

 CARABLsand Dytiscis. 



Fig. 2. — The same from the front, a, a. — The jugularia. 



Fig. 3. — Prosternnm from the side. 



Fig. 4. — Upper view of the meso and metathorax. 



Fig. 5. — The same from beneath. 



Fig. G-8. — Mesosternum and scapulae in their natural situation, b.— 

 Mesosternum (E, E). 



Figs. 7, 8. — Anterior wings of the scapulae (D, D). 



Fig. 9. — Prosternum from within, a, a. — Internal processes. 



Fig. 10. — Metathorax from within, b, b. — The anterior teeth, a, a. — 

 The posterior. 



Fig. 11. — The same from the side. 



Fig. 12. — Meso and metathorax of Hister cadaverinus seen from beneath. 

 S. — First abdominal segment. 



Fig. 13. — The same from above. 



Plate 33. Fig. I. — Oryctes Chevrolatii, Guer. . . .15 



Fig. 2. — Agacephala furcata, Guer. . . . 15 



Fig. 3. — Scarabjeus mentor, Guer. . . .16 



Fig. 4.— Auatomical details of Scarab^us gedeon, Fab. . 16 



