TABLE OF CONTENTS TO PLATES. 



VOLUME IV. 

 INSECT A— Z OOPHYTES 



INSECTA. 

 Plale 1. Fig. 1. — Intestinal canal of Athrophora spumaria, Suckow. A. CEso- 



phagus. D. — Crop. D, D. — Divisions of the ventriculus. 



E. — Ilium. H.— Colon. K, K. — Biliary vessels. 

 Fig. 2.— Intestinal canal of the maggot of Mlsca carnaria, Suckow, 



marked the same as above, N, N, are the salivary vessels with 



their simple outlets, O. 

 Fig. 3. — a. A portion of the biliary vessels much magnified. 

 Fig. 3. — Intestinal canal of the perfect fly marked as before. 

 Fig. 4. — Intestine of the caterpillar of Gastropacha Pini, Suckow, 



marked similarly. F, is the clavate gut. O, O, are the 



spinning vessels. 

 Fig. 5. — Intestinal canal of Pontia brassic^, Herold. C. — The sucking 



stomach. G. — The ccecum, &c. marked as before. 

 Fig. 6. — Proveaticulus of the Dytiscus marginalis. 



Plate 2. Fig. 1. — Intestinal canal of the larva of Calosoma sycophanta, marked 

 as before. H. — The internal longitudinally folded colon 

 to which the last segment of the larva, is still attached. 



Fig. 2. — Intestinal canal of the perfect beetle, Suckow. D. Ventricu- 

 lus. D*. — A portion covered with glands. 



Fig. 3. — Intestinal canal of the larva of Dytiscus marginalis, marked the 

 same 



Fig. 4. — Intestinal canal of the perfect beetle, similarly marked. 



Plate 3. Fig. 1, — Single salivary vessel of Nepis cinerea, Ramd. a. — Duct, h, 



— Glands, c. — Glandular vessel. 

 Fig. 2. — Second salivary vessel of Nepa cinerea, Ramd. a, h. Double 



duct of the auxiliary gland, d. — Auxiliary gland. 'e, e. Chief 



gland. 

 Fig. 3. — Salivary vessel of Blaps, Leon, Duf. 

 Fig. 4. — Auxiliary gland of Tabanus, Ramd. b. — Duct. 

 Fig. 5. — Auxiliary gland of Cicada, Leon, Duf. a, a, a, a. Glandular 



bags, h, b. — Ducts, c, c. — Glandular vessels. 

 Fig. 6. — Ventral salivary glands of Leptis, Ramd. a, a. The two 



glandular bags. 6.— CEsophagus. c— Outlet of the sucking 



stomach, d. — Commencement of the Ventriculus. 

 Fig. 7. — Ventral salivary glands of Bombylils, marked the same. 

 Fig. 8. — Ventral salivary glands of Chrysotoxum, Ramd., the same. 

 Fig. 8*. — Lateral view of the heart of Melolontha vulgaris, a' a. 



Orifices of the heart, 1 — 9. — Ventriculi. B. — End of the 



heart. C. — Aorta. 

 Fig. 9. — Commencement of the heart, with the muscular wings of 



Melolontha vr.iLGARis. a, a. — Muscular wings. b b, 



Orifices in them, in front of each aperture of the heart. 

 Fig. 10. — Spiracle of the abdomen of Dytiscus marginalis. 

 Fig. 11. — Portion of a trachea, a, a. — External tunic, b, b. — Spiral fila- 

 ment which forms the second tunic, c, c. — Third, or mucous 



tunic. 

 Fig. 12. — A portion of the tunic of the air-bag of Musca vomitoria 



magnified. ' 



