8s, o 



Ch. (Droeophlla) 80 



procnemis 



Mycodrosophila B 



( Drosophila) dimidiata 



Scaptomyza graminum 



Type B 



Drosophila earlei 60 



D. prosaltans 60^, om 



D. vrilllstoni 



^ype C 



Drosophila call opt era 

 (D. ornatipenni8) 



lOo 



106, om 



80 



1^(11) 



X-Yd 



Metz 'lSa.h 



k V's+2 R's (o) 



Metz '16 



5 in sali- 

 vary. Geo- 

 graph. var- 

 iation of 

 chroms. 



6ct,om 3^(1) X-Yo* 



Cavalcanti 'kB 



Lancefield 

 & Metz '21, 

 Metz «26 



2 V's+6 R's+2 S's (9) 



X-Yo\ 1 Metz 'l6a,b 

 supernu- 

 merary in 

 some case. 



D. virilis texana 

 Scant omyza adusta 



Type D 



Drosophila immigrans 

 (tripunctata ) 



*V=V-shaped chrom., r=rod-shaped one and s=spheroidal one. 



x-y£ ■» 



6,^=2V'8 Patterson, 

 +6r's+2s's Stone & 



Griff en *k0 



2 V's+6 R's (o.) 



X-Xo_ Metz 'Ik, »16 



J.E.Z. 21; A.F. 50. 



J.E.Z. 21; A.N. 

 50. 



A.N. 50. 



Genet. 33. 



Proc. Nat. Acad. 

 Sci. 7; Z.Z.M.A. 



k. 



J.E.Z. 21; A.N. 

 50. 



Genet. 25. 



J.E.Z. 17; A.N. 

 50. 



-206- 



