Abstract
IN a recent communication1 under this title, Mr. A. C. Evans states that ” Ratcliffe2 has recently suggested that there may possibly be two physiological races of L. sericata, as the length of the pupal period of this insect at 32° C. in Scotland is 5.4 days while in France at the same temperature it is 8 days”. The latter figure was obtained by Ratcliffe (as he states) from an earlier publication of mine3 where I was quoting Cousin4. Evans claims that my quotation is inaccurate and should be 4.9 days, but on further reference to Cousin's work4, I find that it is perfectly correct.
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NATURE, 137, 33 (Jan. 4, 1936).
Ann. Appl. Biol., 22, 742 (1935).
Ann. Appl. Biol., 21, 267 (1934).
C.R. Soc. Biol., 101, 788 (1929).
Bull. Biol. France, Belg., Suppl. 15 (1932).
Ann. Appl. Biol., 17, 554 1930).
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DAVIES, W. Physiological Races of Lucilia sericata, Mg. Nature 137, 320 (1936). https://doi.org/10.1038/137320a0
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DOI: https://doi.org/10.1038/137320a0
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