Elementary text-book of zoology, tr Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote elementarytextbo01clau Year: 1892-1893 i iia Fio. 65.—Tracheae with fine brauches (after Leydig). Z, cellular outer wall; Sp, spiral thread. Via. CGi.—Lateral view of head and body of nn Acridium. St, stigmata ; T, Tympanum. Openings in the body wall are present, placing the organs of aerial respiration in communica- tion with the exterior. These openings may be numerous, and paired, placed symmetrically on the sides FIG. GCa. — Tracleal sye tem of a Dip
Elementary text-book of zoology, tr Elementary text-book of zoology, tr. and ed. by Adam Sedgwick, with the assistance of F. G. Heathcote elementarytextbo01clau Year: 1892-1893 i iia Fio. 65.—Tracheae with fine brauches (after Leydig). Z, cellular outer wall; Sp, spiral thread. Via. CGi.—Lateral view of head and body of nn Acridium. St, stigmata ; T, Tympanum. Openings in the body wall are present, placing the organs of aerial respiration in communica- tion with the exterior. These openings may be numerous, and paired, placed symmetrically on the sides FIG. GCa. — Tracleal sye tem of a :is larva. 2V, Longitudi- nal stem of the right side with tufts of tra- cheae; St', and St', anterior ami posterior stigmata; J/A, oral hooks.
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