252 MISC. PUBLICATION 42 4, U. S. DEPT. OF AGRICULTURE 



Figure 17. — Asterolecanium coronation: A, outline, X 120; B, section of margin, 

 X 900 ; C, antenna ; D, anterior spiracle, X 900 ; E, posterior spiracle, X 900. 

 A. crlstatum: F, antenna; G, genital and anal area, X 345; H, outline, X 60; 

 /, tubular duct ; J, section of margin, X 650 ; K, multilocular pore ; L, quinque- 

 locular pore ; M, dark-rimmed 8-shaped pore ; N, submarginal 8-shaped pore ; O, 

 disk pore. 



