The paper which I have prepared to read upon the genus Colias differs from any that I have consulted up to the present time, in that it treats principally of the habits of the different species during lifetime in the imago state.

During the last ten years giganitc strides have been made by lepidopterologists in breeding the different species of this perplexing family, and their efforts have been crowned with such succes that only a few remain about which nothing is known of the primary stages. It is about the life habits in the prefect state of someof these that I propose to address you, and if my paper does no good, it certainly cannot do any harm, as you will see by the subjoined list of my captures of the different species of Coliadæ that I have a right to express an opinion in this particular direction.