1915] Studies in Diaspinine Pygidia 71 
Aspidiotus brittanicus. 
Micropores fourteen—one in median lobe and one between 
second and third, give rise to minute, filiform, capitate, and 
sometimes stylate tubules, two in second lobe, one in third lobe, 
one cephalad of lateral margin of vaginal opening. 
ASPIDIOTUS BRITTANICUS 
Macropores scattered. Tubules from same, not uniform. 
Funnel form with and without terminal pistons, and capitate, 
armed terminally with fusiform stylets. 
Aspidiotus forbesi. 
Micropores four—one in median lobe, one in second lobe, 
ASPIDIOTUS FORBES! Jahns 
Macropores scattered. Tubules mostly slender, expanded 
toward their truncate apexes and non-pistonate. Filiform, 
capitate, pistonate tubules sometimes visible. 
