CHROMOSOMES IN COREID HEMIPTERA. 93 



more than twice as large as the next in size. Of the remaining 

 twelve, two are much larger than the others, and the rest form a 

 graded series of pairs. The smallest pair, the m-chromosome, is 

 relatively larg-r in this species than in Archimerus and Anasa. 

 In Hg. 5, c and d. are shown two spermatogonial groups illus- 



^a 



9, 



* 



> 

 . * 



c 







^ '" h 



Ifragfi. a and t. oogonial. f and d. spermatogonial nx-tu- 



' vte-(polar) division; <, metaphase group, polar vi>-\v; 



/. ini-t.i; .up. nlilii|iii- polar view; g. six chromosomes in metaph;i-<-, 



a metaphase, side view. 



the .il>\f mentioned points. The idiochromosome does 

 not .i|)|>t .11 oii-tricied as figured by Montgomery ('oi), Fig. 134. 



Ili odgonial groups were figured by Wilson in the third of 

 hi- "Studies" ('06). In them "there are two very large chromo- 

 SOIIH-, rqii.il in -i/c, in place of the single one that appears in the 

 m. ill', \\hili- tlir 1 1 inaining chromosomes show the same relations 

 a- in tin- in.il In Fig. 5, a and b, two of these groups are shown. 



< M thr m. it ur.it ion stages, only four preparation- were obtained, 



