CHROMOSOME STUDIES 



279 



Wilson, E. B. 1905 Studies on Chromosomes. II. The paired microchromo- 

 somes, idiochromosomes and heterotrojiic chromosomes in Hemiptera. 

 Jour. Exp. Zo5l., vol. 2. 



1907 Note on the chromosome-groups of Metapodius and Banasa. 

 Biol. Bull., vol. 12. 



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

 A contribution to the hypothesis of the genciic continuity of chromo- 

 somes. Jour. Exp. Zool., vol. 6. 



1910 Studies on Chromosomes. VI. A new type of chromosome com- 

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



1912 Studies on chromosomes. VIII. Obersvations on the matura- 

 tion-phenomena in certain Hemiptera and other forms, with considera- 

 tions on synapsis and reduction. Jour. Exp. Zool., vol. 13. 



WiNNiwARTER, H. VON 1912 Etudes sur la spermatogenese humaine. Arch. 

 Biol., torn. 27. 



WooLSEY, C. E. 1915 Linkage of chromosomes correlated with reduction in 

 numbers among the species of a genus, also within a species of the 

 Locustidae. Biol. Bull, (in press). 



EXPLANATION OF PLATES 



All figures except those on the first three plates are reproduced at the same 

 scale. The drawings were outlined with an Abbe camera lucida at a magnifi- 

 cation of 3900 diameters, obtained with a Leitz 1/12 homogeneous immersion 

 objective and a Zeiss 18 X compensating ocular with draw-tube set at 150 mm. 

 and drawing made at the level of the base of the microscope. Having been 

 reduced one-third in the reproduction, they now show a magnification of 2600 

 diameters. 



ang.hum., humeral angle 



ang.p., posterior angle. 



apr.prc, apical process of pronotum 



c, chromatoid body 



cap., head 



car.m., median carina 



car.vrt., carina of vertex 



cav., cavity of intestine 



cla.cl.i., (by mistake for) da. chi. 



cl.apx., apical cell 



cl.tis.co'nt., connective-tissue cell 



coe.ga., gastric coecum 



coin., colon 



con., cone-like body 



eta. chi., chitinous cuticle 



cul.crc, circular ridges 



cys., cyst of testis 



dk., darkly stained material 



dst., distal 



ely., elytron 



fem.a., femur of anterior pair of legs 



fs., split 



foil., follicles 



gl.rt., rectal glands 



■iglv., crop 



il., ilium 



lob. I., lateral lobe of pronotum 



lob.su' DC, supra-ocular lobe 



mat.l., first maturation division 



mat.2, second maturation division 



msHhx., mesothorax 



mu.lg., longitudinal muscle of intestine 



nil., nucleolus 



occ, occiput 



oes., oesophagus 



par.cys., cyst wall 



par.foll., follicular wall 



par.nl., nuclear wall 



