2. Ventral malar margin, immediately adjacent to mandibular base, distinctly striate ...3

- Ventral malar margin, immediately adjacent to mandibular base, gently shagreened ...Tessmannella nigra Hedicke

3. Distinct clypo-pleurostomal line present; medial facial area shagreened…Tessmannella spinosa Hedicke

- Clypo-pleurostomal line absent; medial facial area horizontally striate…Tessmannella expansa Quinlan

4. Central scutellar area smooth, with a very faint central ridge …Tessmannella copelandi Buffington & van Noort

- Central scutellar area areolate to foveate … 5 

5. Forewing with single distinct infuscate patch throughout marginal cell and immediately posterior; central scutellar area areolate; dorsal and lateral pronotum areolate…Tessmannella roberti Buffington & van Noort

- Forewing with two infuscate patches, one including the marginal cell and space immediately posterior, and a second faint patch that encompasses the entire distal margin of the wing (leaving a small, hyaline area between the distal margin and the marginal cell); central scutellar area foveolate; dorsal and lateral margins of pronotum horizontally striate, resulting a ‘wave-like’ texture…Tessmannella kiplingi Buffington & van Noort