| OCR Text |
Show 35 abdominal thoracic A spiracles. An spiracle. head anterior lateral trunks in the evident in the abdominal and seventh is of the same Plate II, Figure 6. ages that on of The a the very instar layer much thicker. to the oesophageal ganglia short, a$ the the form These uniform layer of the valve larvae of circular the six long, muscle anchor the it distally into the bears a supra is but to layer pharynx between the latter has invaginated of lobe differ four form the anterior group end of teeth. anterior end gastric The of heavily chitinized are in which posterior-pointing The oesophagus; proventriculus. Each midgut. the as rugae., stomodaeal valve foregut continues The tentorium. wide dilator muscles Ventral larvae differentiation. real Here lumen. early cavity consists thin no to made were the last buccal shows the into extending is entiated sixth sectioned material systems; pharynx is distinguished by the presence thin rugae to as intima chitinous various digestive system of cuboidal epithelium The of organ essentially muscle. of the The low The larvae examined. shown in a also are in the particularly two the trunks Commissural segments, meso connects commissure prothorax. of allow visualization also from the segments. Dissections was trunk arises caecae. of very of the Here tall mesenteron it is columnar is slightly pouched lined with cells a simple, with basal nuclei. |
