Sinea diadema
Sinea diadema is commonly known as the spiny assassin bug and is found in grasslands and fields. It earned its name from the spiked crown that forms on its head. The adult is 12 to 16-mm long. Adults of this species can be found throughout summer and fall.
Order: Hemiptera
Family: Reduviidae
Species: Sinea diadema
Photograph: © 2009 RKD Peterson
Date of Photograph: 28 August 2009
Location: Yellowstone National Park (44o54'48" N 110o43'57" W)