Trichodes ornatus Say is the commonest and most widely distributed representative of its genus in Western North America. It occurs in nearly every state west of the Rocky Mountains, as well as in British Columbia and Alberta, and ranges from sea level up to ten thousand feet elevation. However, in spite of these facts, little has been recorded of the biology of this (or any other) North American species except that the adults are pollen feeders and have been reared from the cells of bees and wasps. As yet, the present authors are not able to provide the complete biology of T. ornatus, but it is believed that at least a general outline of the life cycle has been obtained and a number of significant facts determined which had not been previously recorded for the genus.
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Linsley et al. (1943) studied this question.