172 THE CANADIAN ENTOMOLOGIST. 



8. Eriosoma lanigera Haussman. 

 Aphis lanigera Haussman. 

 Eriosoma mali Somonelle. 

 Myzoxylus mali Blot. 

 Schizoneura lanigera Kaltenbach. 

 Pemphigus pyri Fitch. 



Table of Species: 



Alate viviparous females 

 I. Cornicles present. 



A. Abdomen green, with l)lack lateral spots, etc. 



B. Head and base of antennae without marked 



processes. Cornicles long, cylindrical, black. 



^ Antenna' with 7-8 sensoria on segment 3 and 



2 to 4 on segment 4 pomi 1 



Cornicles moderately long, black, slightly swol- 

 len at base. 

 Antennie with 5-6 sensoria on 3 in a line, none 



on 4 pomonella 2 



Cornicles rather short, pale brown to green, 

 constricted at base and apex. 



Sensoria on segments 3, 4 and o avencr 3 



BB. Head and base of antenna with marked 



processes hiimuli 4: 



AA. Abdomen dark. Black, brownish-black, deep olive- 

 green, with 5 blacker lateral spots and bars, rather 



shiny rnmicis 5 



Unknown nigra 6 



AAA. Abdomen reddish and black kochii 7 



AAAA. Abdomen black white at base iralcegi 8 



n. No cornicles lanigera 9 



Apterous viviparous females. 

 I. Cornicles present. 



A. Green, not mealy. 



B. Cornicles long, c\lindrical, black pomi 1 



BB. Cornicles shortish, brown and green, constricted 



at base and ape.x avence 2 



BBB. Cornicles long, thin, green humuli 3 



