Flower Longhorn Beetle - Brachysomida bivittata [1]
Order Coleoptera -- beetles, besouro, coléoptères / Suborder Polyphaga  / Superfamily Chrysomeloidea
Family Cerambycidae -- capricornes, cérambycidés, long-horned beetles, longicornes
Live adult beetles photographed at Winfield Mounds Forest Preserve, DuPage County, Illinois. Size: 15mm
 

Flower Longhorn Beetle - Brachysomida bivittata
Longhorn Beetle is fairly covered with pollen

The Cerambycidae (longhorn beetles or long-horned beetles) is a cosmopolitan family of beetles characterized by their extremely long antennae, which are often as long as or longer than the beetle's body. There are over 20,000 species described. Many longhorns are serious agricultural pests, as their larvae have the unfortunate habit of boring wood. The Asian Longhorn beetle, for instance has been responsible for the preventive destruction of thousands of trees in Northern Illinois and other locations in the United States.

Flower Longhorn Beetle - Brachysomida bivittata

Flower Longhorn Beetle - Brachysomida bivittata

References
  1. Bugguide.net, Brachysomida bivittata