576 
GENETICS: M. B. STARK 
All figures were drawn with the aid of a camera lucida, using a 16 mm. objective and 
ocular no. 5 with tube length of 165 mm. excepting figures 2, 3, and 5 for which the 4 mm. 
objective was used. 
Fig. 1. Dorsal view of abdomen showing a tumor in dorsal artery. 
Fig. 4. Dorsal view of head, thorax and first segment of abdomen showing a tumor in 
the place of the left wing. 
Fig. 6. Dorsal view of head with a tumor. 
Fig. 7. Dorsal view of thorax with one tumor. 
Fig. S. Side view of abdomen with three tumors. 
