Pachybrachis, IN

Barney, Robert J., 2023, Redescriptions of the Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) of Arizona, Including New Synonymies, State Records, Plant Associations, and Descriptions of New Species: The Robust Species, The Coleopterists Bulletin 77 (3), pp. 439-459 : 440-441

KEY TO GROUPS OF MALE PACHYBRACHIS IN ARIZONA

1. Upper surface distinctly pubescent (see Barney 2019c).............................. Pubescent Species

1′. Upper surface not distinctly pubescent ....... 2

2. Species having the elytra more-or-less distinctly vittate ........................ Vittate Species

2′. Species without distinctly vittate elytra ...... 3

3. Eyes very close, almost touching, IOD = 0.05– 0.12 mm ......................... Eyes Close Species

3′. Eyes not very close, IOD> 0.17 mm .......... 4

4. Species having distinct ocular lines between upper lobes of eyes, often reduced and quite near eyes..................... Ocular Lines Species

4′. Species without distinct ocular lines........... 5

5. Male with forelegs having enlarged tibial spur ...................................... Tibial Spur Species

5′. Male without enlarged tibial spur ............... 6

6. Species predominantely black....................... ................................................ Black Species

6′. Species not predominately black................. 7

7. Species predominately yellow, maculae reduced or absent...................... Yellow Species

7′. Species yellow with red, brown, or black maculae ....................................................... 8

8. Species small and medium sized, mean length <3.60 mm ................... Prototypical Species

8′. Species very large, mean length> 3.60 mm .............................................. Robust Species