VoLUMK VITl SKITKMHFIJ. 1019 N(». 4 



THE INHKHITANCK OF WlNi; COLOUR 

 IN LKlMDOPTKIiA. 



I. AFWAXAS GROSSULARIATA VAR. LUTKA ((V)ckkrell). 



By II. ONSLOW. 



(With PlaU-s IX and X. TahK' aiul twciity-Hvc Tc.xt-Hgurcs.) 



CONTENTS. 



PAOK 



I. Introduction 200 



II. The "TinU.mctor" 211 



The colour scale 212 



III. Method of presenting results 214 



{a) Curves showing the distributions of the colour-values 214 



(6) The frequency distributions ...... 215 



(f) Experimental and statistical errors 216 



(rf) Colour of hind wings, and effects of desaturation and sex . 218 



{r) Table of families, and pedigree 219 



IV. Description of certain varieties . . . . * . . 220 



(a) The melanic series 221 



(6) The distribution of the black pigment in suffused varieties 223 



V. The yellow pigment 224 



The distribution of the pigment in scales of insects of varying 



shades of yellow 226 



VI. The original material 227 



VII. Breeding results 228 



(a) Var. lutea x A. grossulariata ...... 228 



(6) Var. lutea x var. lutea 2.30 



(r) Hybrid (/u/fa x^ro««.) X var. /M/«a 231 



(d) Yiyhri^ {lutea X gross.) >^hy\}x'\di [lutea y. gross.) . . 235 



(e) Hyhrid {lutea X gross.) X A. grossulariata .... 239 

 VIII. Summary 239 



I. Introduction. 



Among the Heteroccra varioties which exhibit changes both of 



colour intensity and colour (quality are not unconiiiion. The former 



may be broadly classed as melanic varieties. The latter, which are less 



Joorn. of Gen. viii 15 



