Archive image from page 342 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 ( THE PROSTERNAL ORGAN. 633 sucker are, however, very highly developed, and are unusually large (Fig. 83). I have been quite unable to find any organs which can be regarded as special nerve-terminals, either on the ligula or in the interior of the m
Archive image from page 342 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 ( THE PROSTERNAL ORGAN. 633 sucker are, however, very highly developed, and are unusually large (Fig. 83). I have been quite unable to find any organs which can be regarded as special nerve-terminals, either on the ligula or in the interior of the mouth. I believe, as com- pared with the Hymenoptera, the power of taste in the Muscidae is much less highly developed. 16. THE PROSTERNAL ORGAN. Allusion has already been made to the prosternal organ (p. 179). This is one of the most incomprehensible structures, having the characte'rs of a sensory organ. I ventured to suggest that it is concerned in registering, as it were, the movements of the head and fore-limbs, but with the further knowledge of this structure which I now possess, I entertain the gravest doubts of the possibility of such an explanation of its function. Fig. 84.—One of the lobes of the prosternal orj;an seen in section ; b, basihir plate of the head ; c, cervical sclerite ; con, condyle ; h, nerve ; / th, part of the pro- thorax. Although I drew attention to it in my former work [62] in 1870, it does not seem to have attracted any attention since, neither have I found any description of a similar organ in any other insect. This structure lies in a deep cavity between the basilar plate of the head and the manubrium (Fig. 84), on either side, and consists of a plate covered with long fine setas (PI. VIII. F'g- 3. ). beneath which there is a layer of large ganglion cells, connected with a branch of the prothoracic dorsal nerve.
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