[ 33i ] 
I was very careful to fee if I could find them in- 
gendring, conceiving it to be much after the Man- 
ner of the fame Species : But ail that I could difeovee 
was, that the Males feparated, and kept under the 
Cover of the Trees, remote from the River. Hither 
the Females reforted, and mixed with them in their 
Flight (great Numbers together) with a very brisk 
Motion of darting or ftriking at one another when 
they met, with great Vigour, like as Houfe Flies 
will do in a funny Room. This they continued to 
do for many Hours, and this feem’d to me their 
Way of Coition ; which mud be quick and foon 
perform’d, as they are of fo fhort Duration. I tried 
feveral Ways to make farther Difcoveries, but all 
proved ineffectual.. 
When the Females were impregnated, they foon 
left the Company of the Males, and fought the Ri- 
vers, and kept conftantiy playing up and down on 
the Waters. It was very plainly feen, every time 
they darted down, they ejefled a Clufter of Eggs, 
which feemed a pale bluifh Speck, like a fmall Drop 
of Milk, as they were finking to the Bottom of the 
River 5 and then, by the Elafticity of their Tails, 
they fpring up again, and then dart down again. 
Thus they continue, until they have exhaufted their 
Stock of Eggs, and fpent their Strength, being fo 
weak that they can rife no more, but fall a Prey to- 
the Fifh. 
But by much the greateft Numbers perifh on the 
Waters, which are covered with them. This is the 
End of the Females but the Males never refort to 
the River that I could perceive ; but, after they have 
done their Office, drop down, languifh, and die, under 
the Trees and Bullies, 
I 
