Volume III 



FEBRUARY, 1914 



No. 3 



STUDIES OF INHERITANCE AND EVOLUTION 

 IN ORTHOPTERA I. 



By ROBERT K. NABOURS. 



LIBRARY 

 NEW YOKK 

 BOTANIC/i»l, 



6AK»>fe.P», 



Paper 3. From the Zoological Laboratory, Kansas State 

 Agricultural College. 



CONTENTS. 



FAQE 



I. Introduction 142 



II. Material and Method 142 



III. Analyses of gametic constitutions and the inheritance of colour patterns . 144 



(1) An analysis and the inheritance of the colour patterns of forms of 



the appearance of texanus, leuconotus, leucothorax and puncto- 



femorata 144 



(2) An analysis and the inheritance of the colour patterns of forms 



of the appearance of luteolineatus and rufrolineatus . . 150 



(3) The interbreeding of heterozygotes 155 



(4) Further hybridization and the inbreeding of the heterozygotes . 157 



(5) Results from the mating of heterozygotes with one or the other 



of the parent forms 159 



IV. Long and Short wingedness 160 



(1) Long and short wingedness in nature 160 



(2) Long and short wingedness in the breeding experiments . . 162 

 V. An examination of the location, arrangement and relations of the pigmental 



elements in the colour patterns of the parent forms and their 



hybrids 164 



VI. Discussion 166 



(1) The inheritance of the colour patterns 166 



(2) The appearance of long and short wingedness .... 167 



(3) Equivalence in the hybrids 168 



(4) The "genotype conception " applied to the behaviour of these forms 168 



VII. Conclusions 169 



Bibliography ............ 170 



Journ. of Gen. in 10 



