Prof. Webster's interesting note on page 4 leads me to offer a few remarks. The species of the sub-genus Toumeyella of Lecanium have quite a strong musky odour; but ordinarily I have been unable to detect any marked odour in species of Coccidae. I suppose, however, that all possess some odour, and that its purpose is to attract the males to the females. This seems the more probable when we remember that in many species the male puparia are not on the same part of the plant as the famales. Here at Mesilla Park, also, I have lately seen a male of Margarodes hiemalis, Ckll. ined., run over the ground until it detected a spot where a female was buried, and them dig down to the female. It must certainly have detected its mate by the sense of smell.