562 SIDNEY I. KORNHAUSER 
The changes in the coloration of the male pronota above de- 
scribed cannot be referred to retardation of development for the 
integument of the fifth instar (figs. 15 to 18) is entirely different 
in structure and coloration from that of the adult. The cutic- 
ula covering the entire dorsum of the nymph has long spines 
projecting from its surface (figs. 17 and 18). These spines are 
Fig. 15. Lateral view of fifth nymphal instar, showing mottled pigmentation 
of body and appendages due to large areas devoid of melanin. 5.3. 
Fig. 16 Cuticula of pronotum of fifth nymphal instar. Each small spot on 
the dark background represents the base of a long jointed hair. The large light 
spots which cause the mottling are plainly shown. X 14.7. 
Fig. 17 Small area of cuticula seen in figure 16, under greater magnification, 
showing details of long jointed hairs in dark and light areas. X 66.6. 
Fig. 18. Cuticula from sixth abdominal tergum of nymph in fifth instar,. 
showing jointed hairs, their bases, and distribution of meanic pigment. X 600. 
