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Quarterly Journal of Microscopical Science, Vol s3-97, 429-433, Copyright © 1956 by Company of Biologists

The Antennal Pulsating Organs of Mosquitoes and other Diptera

A. N. CLEMENTS 1

1 Department of Zoology, Birkbeck College, University of London

The antennal pulsating organ of mosquitoes consists of two vesicles, each sending a blood-vessel to the antenna of its side and each connected to the aorta by a muscle. Contraction of the muscle causes blood to enter the vesicle through a valve and relaxation allows an elastic contraction of the vesicle so that the blood is discharged through the blood-vessel to the antenna. The organ appears to be myogenic.

Antennal pulsating organs occur in most families of the Diptera Nematocera but not all, and a similar organ is present in Drosophila.






© The Company of Biologists Ltd 1956