110 EDMUND B. WILSON 



1909b Studies on chromosomes, V. The chromosomes of Metapodius, 

 etc. Jour. Exp. Zool., vol. 6. 



1909c Secondary chromosome-couplings and the sexual relations in 

 Abraxas. Science, n. s. 29, p. 748. 



1909d Differences in the chromosome-groups of closely related 

 species and varieties, etc. Proc. Seventh Internat. Zool. Congress, 

 Aug. 1907. 



1910a The chromosomes in relation to the determination of sex. 

 Science Progress, no. 16, April. 



1910b Studies on chromosomes, VI. A new type of chromosome-com- 

 bination in Metapodius. Jour. Exp. Zool., vol. 9. 



1910c Note on the chromosomes of Nezara. Science, n. s. 803, May 20. 



