Third antennal segment more than two-thirds as long as second; frons shorter than wide; vertex large, as long as frons.
Remarks
This subgenus has a single species in our area, Physoconops (Gyroconops) sylvosus. Remarks on the subgenus can be found in Camras (1955) starting on pg. 174.
Camras, Sidney (1955), "A Review of the New World Flies of the Genus Conops and Allies (Diptera: Conopidae)", Proc. U. S. Nat. Mus., Vol. 105, pp. 155-187 (Full Text).