I thought that some of the earlier flights in April might be caused by the vegetation of the Pacific side of the continent being still parched up, whilst on the Atlantic slope the forests were green and moist. But in June there had been abundant rains on the Pacific side, and vegetation was everywhere growing luxuriantly. Neither would their direction from the north-west bring them from the Pacific, but from the interior of Honduras and Guatemala. The difficulty is that there are no return swarms. If they travelled in one direction at one season of the year, and in an opposite at another, we might suppose that the vegetation on which the caterpillars feed was at one time more abundant in the north-west, at another in the south-east; but during the five years I was in Central America, I was always on the look-out for them, and never saw any return swarms of butterflies. Their migration every year in one definite direction is quite unintelligible to me. We gradually ascended the range that separates the watershed of the Lake of Nicaragua from that of the Blewfields river, passing over grassy savannahs. About two leagues from Libertad there are many old Indian graves, covered with mounds of earth and stones. A well-educated Englishman, Mr. Fairbairn, has taken up his abode at this place, and is growing maize and rearing cattle. There are many evidences of a large Indian population having lived at this spot, and their pottery and fragments of their stones for bruising maize have been found in some graves that have been opened. Mr. Fairbairn got me several of these curiosities, amongst them are imitations of the heads of armadillos, and other animals. Some of these had formed the feet of urns, others were rattles, containing small balls of baked clay. The old Indians used these rattles in their solemn religious dances, and the custom is probably not yet quite obsolete, for as late as 1823 Mr. W. Bullock saw, in Mexico, Indian women dancing in a masque representing the court of Montezuma, and holding rattles in their right hands, to the noise of which they accompanied their motions. Several stone axes have been found, which are called "thunderbolts" by the natives, who have no idea that they are artificial, although it is less than four hundred years ago since their forefathers used them. Like most of the sites of the ancient Indian towns, the place is a very picturesque one. At a short distance to the west rise the precipitous rocks of the Amerrique range, with great perpendicular cliffs, and huge isolated rocks and pinnacles. The name of this range gives us a clue to the race of the ancient inhabitants. In the highlands of Honduras, as has been noted by Squiers, the termination of tique or rique is of frequent occurrence in the names of places, as Chaparriistique, Lepaterique, Llotique, Ajuterique, and others. The race that inhabited this region were the Lenca Indians, often mentioned in