nymphs



host plant genera
Crataegus Malus Prunus Pyrus Sorbus




Crataegus
circumanal ring
consisting of
capitate setae on dorsum of
caudal plate
number of capitate setae on margin of forewing bud
C. affinis
one row of pores present variable  
C. crataegi
one row of pores absent > 5  
C. melanoneura
one row of pores absent < 5  
C. peregrina
several rows of pores absent absent  


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Malus
circumanal ring
consisting of
setae on antennal segment
C. melanoneura
one row of pores shorter than diameter of segment  
C. mali
several rows of pores shorter than diameter of segment  
C. picta
one row of pores apical seta longer than diameter of segment  


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Pyrus
number of marginal sectasetae on caudal plate number of long capitate setae on margin of forewing bud
C. bidens
0 1-3  
C. pyri
0 1  
C. pyricola
0 2-3  
C. pyrisuga
3+3 absent  


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Sorbus
circumanal ring consisting of capitate setae on dorsum of caudal plate long capitate setae on wing buds number of marginal
sectasetae on
caudal plate
C. albipes
one row of pores long absent 3+3  
C. brevian-
tennata
one row of pores long present 3+3  
C. corcontum
one row of pores short absent 0  
C. sorbi
several rows of pores absent absent 2+2  


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