Rodolia cardinalis Mtds. 



53 



Ein weiterer Erfolg der biologischen Bekämpfungsmethode wurde in Kali- 

 fornien gegen die Citrus- Schädlinge der Schildlausgattung Pseudococcus erzielt. 



Auf seiner zweiten australischen Reise entdeckte Koebele 1891 die Coccinellide Crypto- 

 laemus montrouzieri Mute. 1 ) als Schildlausfeind (besonders von Pseudococcus aurilanatus Mask . 

 und anderen Arten); er fand sie an vielen Orten in Queensland und New South Wales 

 und sandte Material nach Kalifornien, indem er empfahl, die Marienkäfer dort zur Bekämpfung 

 der Schildlaus Saissetia oleae Bern, auszusetzen; die ersten Exemplare kamen im Dezember 



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