Preadult

This species has been described from a series of specimens including holotype adult female and paratype adult females and males and preadults collected by Mr. E. G. Smyth on Acacia species at Oaxaco, Mexico, September 22, 1923, while he was engaged in a search through Mexico for parasitic enemies of the Mexican Bean Beetle for the Bureau of Entomology.

In May it transforms to a preadult, and about 15 days later it becomes mature. No males or winged forms of this species are known.

The food required for larvae and the adults might be different in their quality and quantity. Sastry (1965) reared the scallop larvae to preadults by providing unicellular algae as food. Additional experiments to determine the value of different organisms in plankton as food for larvae are needed for an understanding of the relationship between food and reproduction.