Identification
1 Lateral margins of anterior pronotal lobes either explanate or bearing a row of comblike projections >> 2
Lateral margin of anterior pronotal lobe neither explanate nor with a row of comblike projections, the pronotum rounding into the propleura >> 3
2 Anterolateral angles of pronotum projecting acutely cephalad to anterior margin of pronotal collar; length 9.9-10.4 mm >> probolus
Anterolateral angle of pronotum not projecting cephalad to anterior margin of pronotal collar; length 7.1-9.3 mm >> pacificus
3 Humeral angles of pronotum and posterolateral angles of connexival segments III to V with small but distinctly projecting angulations; length 10.1-11.6 mm >> denticulatus
Humeral angles and connexival segments without projecting angulations; length 9.4-11.1 mm >> americanus