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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References
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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