160 



Anfzals Entomological Society of America [Vol. XIII, 



IV. CHERMISINA.* (Life Cycle Typical for Chermes). 



Primary Host, 

 Picea 



Intermediate Host, 

 Larix (or Pinus or Abies) 



1st 

 Year 



I. Fundatrices (hibernate — cause 



I galls — wingless, all 9 



II. Alatae (larvae inhabit gall — 



Non adults winged, all 9 



migrantes Migrantes 



2nd 

 Year 



I. Fundatrices (as before) 



V. SeJcuales (wingless- 



I cause no gall) 



II. Alate (as before) 

 Non-migrantes Migrantes 



to Larix 



(as 

 before) 



III. Colonici (hibernate — cause no 

 I gall — wingless, all 9 



larvae live on the 

 needles — cause no gall 

 all 9 



IV. Sexuparae Exsules 



(adults winged) (adults wingless) 



Exsules 



I. Fundatrices I. Fundatrices 



* No longer included with the family Aphididae in its restricted sense. 



(Adapted from E. R. Burdon, Proceedings of the Cambridge Philosophical Society, 

 Vol. XIII, Pt. 1). 



