

OBSERVATIONS ON INSECTS AND VERMES. 415 



I suppose the moths had issued, and whose caterpillar had eaten 

 the leaves. MARKWICK. 



EPHEMERA CAUDA BISET A. MAY-FLY. 



June loth, 1771. Myriads of May-flies appear for the first time 

 on the Alresford stream. The air was crowded with them, and 



MAY-FLIES IN SUNSET DANCE. 



the surface of the water covered. Large trouts sucked them in 

 as they lay struggling on the surface of the stream, unable to rise 

 till their wings were dried. 



This appearance reconciled me in some measure to the wonder- 

 ful account that Scopoli gives of the quantities emerging from the 

 rivers of Carniola. Their motions are very peculiar, up and down 

 for many yards almost in a perpendicular line. WHITE. 



