Ypsilon stink bug

Appearance

Length: 7 - 9 mm
In Mormidea ypsilon the shoulders may be rounded narrowly, or else are spinose. The scutellum is longer than wide. The membrane is somewhat smoky. The basal antennal segment is pale, variously streaked in a darker color. The remaining antennal segments are dark, with the exception of narrow pale-colored bands on the fourth and fifth segments (Rolston, 1978).
The specific epithet, of course, refers to the ivory to yellowish marking shaped like a Greek Y.