May, '08] ENTOMOLOGICAL NEWS. 2ig 



no such great masses of them as those on the cottonwood 

 above mentioned. With them we observed two other species 

 numerous that on previous occasions we had not noticed. Not 

 being an entomologist, however, I should hesitate to state that 

 they were not then present. These two were Papilio cres- 

 phontcs and a black swallow-tail not quite so large that I am 

 fairly well satisfied was P. troilus. I collected specimens but 

 inadvertently lost them so have to rely upon an uneducated 

 memory and the probabilities. Of these two the former was 

 slightly the more common but both were abundant. I under- 

 stand that these latter forms are not supposed to migrate but 

 here they were certainly, without exception, flying down the 

 Point and crossing over the lake along the same course fol- 

 lowed by the Monarchs. There was no indications of flock- 

 ing in these two species nor did they seem to associate w r ith 

 each other or with plcxippns but at all times of the day there 

 was a steady stream of them, making in the same direction, 

 steadily and without loitering. 



The Point ends in a long sand pit which we visited almost 

 daily, and on all such occasions, except during rather heavy 

 winds, all three species came sailing out the Point to the ex- 

 treme end and then launching directly out into the lake along 

 the same route that most of the diurnal birds followed, not 

 toward Pelee Island, the first of the island stepping stones 

 that lies plainly visible some ten miles distant ; but taking 

 a more westward line that would carry them straight across 

 the open lake. They came at the rate of about three a minute 

 on fine days and crcspJwntcs was the most numerous of them 

 and there were fewer ple.rippns than troilus. It was most in- 

 teresting to watch them come, and observe the regularity and 

 Apparent deliberateness of their movements. On calm days 

 they came right down the center of the Point and followed 

 every winding of the final sand spit to its extreme termination 

 from whence they turned and squared away on the course 

 as described before. At times when there was a little wind 

 their proceedings were a little different. As soon as they reach- 

 ed the end of the heavier timber they kept well down in the 



