Yellow clover aphid 



( Therloaphis trifolli ) 

 Yellowheaded spruce savffly 



(Pikonema alaskensls ) 

 Yellow Jackets 



2k6 

 Yellownecked caterpillar 



( Da tana ministra) 

 Yellow scale 



(Aonldiella citrina) 



Yellowstriped armywomi 

 ( Spodoptera ( 



Yellow sugarcane aphid 

 (Sipha flaya ) 



Yosemite bark weevil 

 ( Plssodes schwarzl ) 



Zebra caterpillar 



( Ceramica picta ) 

 Zeiraphera vancouverana (an olethreutid 



moth) Th, 272 

 Zimmerman pine moth 



( Dioryctria zimmermani ) 

 Zonosemata electa (pepper maggot) 



198, liih 

 Zootermopsis an fustic oil is (Pacific 



dampwood termite) h^, 191, 25O, 78O 



