[2][3][4] This species originated in Siberia, north east China and the northern part of the Korean peninsula.

[citation needed] By 1890, it had spread over the greater part of California, but was not recognized east of the Rocky Mountains until August 1893, when it was found by Howard on a pear received from Charlottesville, Virginia.

Soon afterward it was discovered that infested stock had been brought from California in 1887 or 1888 by two New Jersey nurseries and distributed widely.

He introduced the ladybird to the United States in order to control the San Jose scale.

[6] The body of adult female is yellow and is covered with a rounded dark gray scale up to two millimetres in diameter.

Over the course of two months, yellow crawlers are born viviparously and emerge from the back of the test at the rate of two or three a day.