Pachybrachis

Barney, Robert J., 2024, Redescriptions and Figures of the Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) of Arizona, Including New State Records, Plant Associations, and Descriptions of Five New Species: The Yellow Species, The Coleopterists Bulletin 78 (2), pp. 219-232 : 220

KEY TO MALES OF THE YELLOW GROUP OF ARIZONA PACHYBRACHIS

1. Front tarsal claws greatly enlarged ( Fig. 1 ) ...... 1. Pachybrachis caelatus J. L. LeConte

1′. Front tarsal claws not greatly enlarged ....... 2

2. Face protruding or swollen forward; eyes widely separated, IOD> 0.40 mm; very rare ( Fig. 2 ).............. 2. Pachybrachis chiricahua Barney , new species

2′. Face not protruding or swollen forward; eyes not widely separated, IOD <0.40 mm ........ 3

3. Eyes narrowly separated, IOD <0.20; pronotum darker than elytra; very rare ( Fig. 3 ).......... 3. Pachybrachis harshaw Barney , new species

Figures

Fig. 1. Pachybrachis caelatus, San Diego, California, lectotype. A) Dorsal habitus, B) Lateral habitus, C) Face, D) Pygidium, E) Median lobe of aedeagus, lateral view, F) Median lobe of aedeagus, en-face view.

Fig. 2. Pachybrachis chiricahua, new species, Chiricahua Mountains, Arizona, holotype.A) Dorsal habitus, B) Lateral habitus, C) Face, D) Pygidium, E) Median lobe of aedeagus, lateral view, F) Median lobe of aedeagus, en-face view.

Fig. 3. Pachybrachis harshaw, new species, Santa Cruz Co., Arizona, holotype. A) Dorsal habitus, B) Lateral habitus, C) Face, D) Pygidium, E) Median lobe of aedeagus, lateral view, F) Median lobe of aedeagus, en-face view.