Archive image from page 304 of The anatomy, physiology, morphology and. The anatomy, physiology, morphology and development of the blow-fly (Calliphora erythrocephala.) A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author; CUbiodiversity4765349-9875 Year: 1890 ( A UDITOR Y AND SOUND-PRODUCING MECHANISMS. 6oi Miiller's organ both in form and structure; it is situated on the tracheal sac beneath the tympanic membrane. The crista consists of a ridge which extends from the bulb, in a longitudinal direction, o
Archive image from page 304 of The anatomy, physiology, morphology and. The anatomy, physiology, morphology and development of the blow-fly (Calliphora erythrocephala.) A study in the comparative anatomy and morphology of insects; with plates and illustrations executed directly from the drawings of the author; CUbiodiversity4765349-9875 Year: 1890 ( A UDITOR Y AND SOUND-PRODUCING MECHANISMS. 6oi Miiller's organ both in form and structure; it is situated on the tracheal sac beneath the tympanic membrane. The crista consists of a ridge which extends from the bulb, in a longitudinal direction, over the sac. This ridge is formed of cuboid cells which become smaller as they recede from the bulb. These cells enclose the enlarged capitella of the chordotonal threads. The chordotonal ligaments extend from the cuboid cells to the adjacent integument. The ligaments are longest at the proximal end of the crista, that nearest to the bulb, and become gradually shortened as they approach the distal end of the crista. The chordotonal rods are frequently bent at right angles, where they join the capitella, and are sometimes jointed in the middle. The Supratympanic Organ (Graber's organ) (Fig. 78) resembles a large Mtillerian organ, which is fan-shaped in section. It is at- tached to the integument, near the tympanic membrane, and lies upon a ganglion, in which a branch of the auditory nerve terminates. It is only indirectly connected with the tym- panic membrane and its air-sac through the medium of the circulating fluid ; it lies in a distinct blood sinus, one of the walls of which is formed by the tracheal air-sac. The Mirrors of the Locustidae are thin, tense areola; of a circular form, situated on the base of the elytra of the sound-producing males. They are usually regarded as organs for the intensification of the sound produced —resonating organs. This view of their nature is rendered more probable since these insects possess ear-like organs on the anterior tibiae in both
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Keywords: 1890, archive, blowflies, book, bookauthor, bookdecade, bookpublisher, booksubject, bookyear, drawing, historical, history, illustration, image, london_pub_for_the_author_by_r_h_porter, lowne_benjamin_thompson_1839_, page, picture, print, reference, vintage
