Note 20 — Chapter IV · GOVERNMENT EXPLORATIONS

Sometimes we were several hours passing a cloud of millions upon millions of these insects, which were going the other way; at other times they were found settled upon the ground, covering great areas, or they were crawling and hopping over the grass and sand. The newly-born ones stream along the ground like a brown rivulet; then there are half-grown ones, which can only hop, and look from a distance like strips of green grass. The full-grown locusts are of three colours-yellow, green, and spotted red. The different generations do not appear to mix.