36 



Linkage Group III. 



IV. LINKAGE GROUP III. 



This group consists of the five characters scaly, spread, hunch, 

 telescoped, and garnet. A sixth character, steel (for description 

 see Metz, 1916d), also belongs in this group, but it proved to be so 

 difficult to classify that the stock was discarded. 



-- sepia (se) 



6 



7 



24 



24.5 



26 



36 



42 



102 



109 



n 



-- Con-fluerrt (C) 



yellow (y) 

 frayed (fd) 



crossveinless (c) 

 vermilion (v) 

 vesiculated (vs) 



oblicjue (o) 



Sin6ed (si) 



rugose, etc. (r) 



droop (d) 



42±-- concave (cc) 



HE 



-- Scaly (S) 



2i± -- spread ? (sp) 



3I± 



48 ± 



hunch (h) 



telescoped (♦) 



9li:-- Garnet (G) 



Figure 7. 



Crossover maps of linkage groups I to III in Drosophila virilis. Maps II and III are only in- 

 tended to give approximations of the linkage relations. Double and broken in group II have 

 not yet been located on the map. 



