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



Figure 19. — Asterolecanium difficile: A, genital and anal area, X 650; B, outline, 

 X115; C, antenna; D, 8-shaped pore; E, section of margin, X 650; F, spiracle; 

 G, niultilocular pore ; H, trilocular pore. A. disiunctum: I, outline, X 87 ; J, 

 genital and anal area, X 650 ; K, claw ; L, antenna ; M, section of margin, X 

 650 ; A 7 ", marginal 8-shaped pore ; 0, dorsal 8-shaped pore ; P, tubular duct. 



