1196 
Journal of Agricultural Research voi. xxviii, No. 12 
Fig. 5—A,part of dorsal diaphragm of old larva, showing diaphragm cells (DphCl) and muscle fibers 
( DphMcl ), X66; B, longitudinal (coronal) section of heart in the region of the second thoracic segment, 
showing ostia ( Ost ) and valves. X260; C—H, blood cells (lymphocytes), X600 
