ESPERMATOGÉNESIS DEL «BI.APSí' 93 



1905 (a). — WiLsoN (E. B.) Studies on Chromosomes. I. — The Behavior of 

 the Idio chromosomes in Hemiptera. Journ. exper. Zool., t. 2. 



1905 (b). II. The paired microchromosomes, idiochromosomes and 



heterotropic chromosomes in Hemiptera. ídem, t. 2. 



190Ó. — III. The Sexual differences of the Chromosome groups in 



Hemiptera with some considerations on the determination and 

 Inheritance of Sex. ídem, t. 3. 



1909 (a). — IV. The «Accessory» Chromosome in Syromastes and 



Pyrrhocoiñs with a comparativa Review of the Types of sexual 

 Differences of the Chromosome Groups. ídem, t. 6. 



1909 (b). — V. The Chromosomes in Metapodius. A contribution to 



the Hypothesis of the genetic Continuity of Chromosomes. 

 ídem, t. 6. 



1910. — — — VI. A New Type of Chromosome Combination in Metapo- 

 dius. ídem, t. 9. 



191 1. — VII. A Review ofthe Chromosomes of Nezara with some 



more general Considerations. Journ. of Morphol. t. 



191 1. — • The Sex Chromosomes. Arch. f. mikr. Anat. t. 77. 



1906. — ZwEiGER (H.) Die Spermatogenese von Forfícula auricularia. Zool. 

 Anz. t. 30. 



Trali. del Mus. Nac. de C. Nat- de Madrid. — Serie Zool.. núm. iS. — 1014. 



