Figure 10. Microchromosomal arrays from male diakinesis. This is to show the XY dimorphism in S. clarkii: note the consistently unequal pairing of the 7th bivalents. A-G are all clarkii: A. (F5100), B. (SIU 104), C. (SIU 95), D. (SIU 95), E. (Y44246), F. (Y44246), G (Y44325); H. S. pictus (Y25568); I. S. cyanogenys (Y25488) . The bar in row 9 of columns H and I represents 10 micrometers.