SOME EXPERIMENTS IN HEREDITY WITH 

 ABRAXAS GROSSU LARIAT A AND TWO 

 OF ITS VARIETIES. 



By the Rev. J. M. WOODLOCK, S.J., M.A., 

 St Stanislaus College, Tullamore, Ireland. 



The experiments were carried out in conjunction with the 

 Rev. G. Waddington, S.J., who had obtained some larvae of the 

 var. lacticolor through the kindness of the Rev. G. H. Raynor of 

 Hazeleigh Rectory, Essex, and Dr L. Doncaster. They were carried 

 out in the intervals of other important work, which must serve to 

 excuse their incompleteness. 



The new variety of Abraxas grossulariata termed " Q " in this note 

 is somewhat like kicticulor in appearance, though not quite so pro- 

 nounced, as the black markings are sharper in outline and generally 

 rather heavier and the distinctive cream colour of lacticolor is practi- 

 cally absent ; nor has it the soft surface texture of lacticolor : it differs 

 also in that the black markings other than the discoidal spots are 

 visible on the under surface of the wings, which is not the case in 

 lacticolor. It was found in the grounds of Milltown Park, Dublin. 



" Q " appears to be a simple recessive to (jrossulariata as the 

 following results show : 



F^. Grusstdariata </ x " Q" ? gave about .50, all grossulariata in 

 type. 



F.,. From these six pairings were made : the resulting numbers 

 were small, chiefly owing to heavy mortality in the egg just before 

 hatching due to dryness, and also from the fact that, as the parents were 

 forced out in March, the larvae were in the hibernating stage during 



