I, perhaps, can throw a little light on the subject that "B.," of Colora, Md., writes about, and of which you say it is worthy of further investigation.

Last summer I was losing some fine cauliflower plants, that had been pricked out in the very same manner that " B., " of Colora, complains of. My vexation led me to take a few of the grubs that appeared to be mature (for I found them in all stages of growth, from very minute ones, that were white, soft, and wriggly, to those that had assumed a chrysalis form, and dark yellow in color) and imprisoned them under a glass inverted upon a clean white saucer; in about three days I had a common house-fly for every grub that I had confined under the glass. I have read repeatedly the theory of this insect being the larvao of the flea beetle, also other theories. Through my investigation, I hold the idea that the common house-fly is the source of trouble, and in the same manner that meat gets fly-blown. I could write more regarding this, but it would be theories of my own, while the above are facts.