Dog day cicada or harvest fly, T i h i c c n tibiccn Linn. 



1 Adult 



Periodical cicada, Tibiccn scptendccim Linn. 



2 Adult 



Alder blight aphid, P e m p h i 5^ u s t e s s e 1 1 ;i t a Fitch 



3 PorticMi of aldiT twi^' bculh' infested 



4 Twig infested with young 



a 430 



