Third-instar larvae of the zoline genera Oopterus Guerin-Meneville and Idac
arabus Lea are described and illustrated. It is confirmed that both studied
taxa belong to the supertribe Trechitae; however, monophyly of Zolini rema
ins doubtful. Larvae of the studied taxa possess a set of almost exclusivel
y plesiomorphic character states and the relationships of the two genera wi
thin Trechitae are not evident.