Pachybrachis turbidus, (LeConte)

Barney, Robert J., 2019, Key to All Sixty-Four Species of Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) in the Eastern USA, The Coleopterists Bulletin 73 (1), pp. 85-96 : 89

41. Large, robust (L = 2.74–3.23 mm); yellow with red-brown to black maculae; elytra coarsely punctate, striae deeply impressed, marginal interspace impunctate; anterior and posterior maculae usually coalesce to form 2 irregular transverse fasciae; DEO of median lobe culminating in a triangular extension of terminus; in lateral view, ventral surface of median lobe broadly inflated, distinctly narrowed at basal contraction; beard consisting of long setae at ALM ............ 60. P. turbidus (LeConte)

41 ʹ. Small to medium size (L = 1.90–2.86 mm); elytra and median lobe not as above .......... 42

42. Medium size (L = 2.50–2.86 mm) ......... 43

42 ʹ. Small (L <2.40 mm) ......................... 44