Serica alternata is a species of beetle of the family Scarabaeidae.BioLib It is found in the United States (California, Colorado, New Mexico, Utah) and Mexico (Baja California).
Description Adults reach a length of about 7-9.5 mm. The colour is dark chestnut and the surface is sub-shining with the elytra moderately iridescent.
Subspecies Serica alternata alternata (California, Colorado, New Mexico, Utah, Baja California) Serica alternata exolita Dawson, 1933 (California) Serica alternata patruela Dawson, 1933 (California)
Life history Adults have been recorded feeding on the foliage of Prunus virginiana, as well as Quercus agrifolia, the flowers of Heteromeles arbutifolia, Ceanothus palmeri, Rhus trilobata, Abies concolor, Sambucus mexicana and Eriogonum fasciculatum.
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