Distribution is incompletely known due to confusion with the very similar O. friesei.
There is very little to separate this species from Ocnerostoma friesei. Attention should be paid to the antenna, which is ringed white and pale grey in the male and white in the female.
[MBGBI vol3, p65]
|Determination by Genitalia Examination (gen. det.) Required|
Recorded in 8 (12%) of 69 10k Squares.
First Recorded in 1874.
Last Recorded in 2020.