Figures 227-238. — Ophiomyia chondrillae : 227, Head; 
228, aedeagus, side view; 229, same, ventral view; 
0. subpraecisa : 230, Aedeagus, side view; 231, 
same, ventral view; 0. ambrosia : 232, Head; 233, 
aedeagus, side view; 234, same, ventral view; 0. 
quinta : 235, Head; 236, aedeagus, side view 
(Canada); 237, same, ventral view (Arkansas); 238, 
leaf mines on Aster ; (235, 237, 238, Arkansas; 236, 
Canada) . 
361 
