PT - JOURNAL ARTICLE AU - MADDRELL, S. H. P. TI - Excretion in the Blood-Sucking Bug, <em>Rhodnius Prolixus</em> Stål DP - 1963 Jun 01 TA - Journal of Experimental Biology PG - 247--256 VI - 40 IP - 2 4099 - http://jeb.biologists.org/content/40/2/247.short 4100 - http://jeb.biologists.org/content/40/2/247.full SO - J. Exp. Biol.1963 Jun 01; 40 AB - 1. The mechanism underlying diuresis in Rhodnius has been investigated. 2. An isolated preparation of the Malpighian tubules of a 5th-instar larva is described. 3. The rate of secretion by such a preparation, isolated in a drop of haemolymph, is at first high but soon falls to a low level. It can be restored by the addition of haemolymph taken from an insect during diuresis. 4. It has been shown that diuresis is promoted by some substance, presumably a neurohormone, which can be extracted from the posterior neurosecretory cells of the fused ganglionic mass situated in the mesothorax.