USGS - science for a changing world

Northern Prairie Wildlife Research Center

  Home About NPWRC Our Science Staff Employment Contacts Common Questions About the Site

Caterpillars of Eastern Forests

Oak Besma (Besma quercivoraria)

JPG-Photo of Oak Besma

Green, brown, or tan twig mimic with conspicuous reddish or darkened thoracic and abdominal swellings. Head reddish brown, flattened and sloping; vertex somewhat lobed to either side, lobes often bearing pale triangular area, widest behind. Second thoracic segment conspicuously swollen. Abdomen: second segment with small subspiracular and ventral warts; third bearing conspicuous lateral and dorsal swellings, and sixth with dorsal warts; subtle longitudinal wrinkle forward of spiracle. Straw besma (B. endropiaria) has warts like those of oak besma but tending to be greener; (especially on maple). Food: many forest trees including conifers. Caterpillar: May to October; 2 generations in North.

Previous Section -- Oak Beauty
Return to Listing of Loopers, Inchworms, and Spanworms
Next Section -- Maple Spanworm

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Webmaster
Page Last Modified: Saturday, 02-Feb-2013 05:11:29 EST
Sioux Falls, SD [sdww55]