Stenoma diametrica is a moth of the family Depressariidae. It is found in Colombia."Stenoma Zeller, 1839" at Markku Savela's Lepidoptera and Some Other Life Forms
The wingspan is about 18 mm. The forewings are violet white, with a few scattered brown scales and a brown spot beneath the base of the costa and a light violet-grey band sprinkled brownish extending along the dorsum from the base to four-fifths, including a brown trapezoidal blotch resting on the dorsum before the middle, becoming blackish towards the dorsum, widened upwards and the discal edge twice dorsal. The first discal stigma forms a dark brown dash and the wing beyond a line from the middle of the costa to the tornus is chestnut brown, enclosing a costal blotch of light ochreous suffusion, and some white suffusion at the apex, a white dot in the middle of the edge of this patch representing the second disoal stigma. The hindwings are oohreous white with a grey fascia on the upper three-fourths of the termen, moderately broad at the apex and diminishing to a point downwards.Exotic Microlepidoptera 3 (5-7): 239
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