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Photo., Dept. Agriculture , Brisbane. 

 Pig. 33. — The Opuntia White Scale — TJiaspii crliiiiocacti — on a joint of the pest pear, Brisbane. 



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Photo., Buriiiu of Kiitomoloiji/. Dipt. .Iffriculturc, r.,S'..l. 

 Fig. 3i.—I>iaspis cchinocarti cadi on an Opuntia, Texas. 



