Professors Riley and Lester Ward have a difference of opinion, as to the appearance of a seventeen-year locust so late as October last. Dr. Ward did not see the insect, but believes he heard the song. Prof. Riley believes that sometimes a few will appear a year in advance of the main army, or may rest till a year after; but that the appearance in these years will be at the same season that the main brood appears, and never as late as October. We supposed it was conceded that creatures of this class could appear whenever there was warmth enough to accelerate, or lack of warmth to retard, no matter what the season of the year.

Once the writer had two greenhouses, running parallel, about 16 feet apart, and with banks of earth against the wall to help keep out frost. Just before winter this space was enclosed by glass, and turned into a warm propagating house. That winter, numerous "lightning bugs" were in the house, hatched out months before their regular season, presumably from larvae in the earth banks, and by the artificial winter warmth. Mentioning the fact to an entomologist at the time, it was not regarded as anything remarkable.