Parorectis Spaeth, 1901

Riley, Edward G., 2020, A new species of Parorectis Spaeth from the north-central United States, with notes on prothoracic and head morphology of the genus (Coleoptera: Chrysomelidae: Cassidinae: Cassidini), Insecta Mundi 2020 (808), pp. 1-9 : 7-8

Key to the species of Parorectis Spaeth

1. Elytral disc tuberculate, with dark coloration extended onto anterior and posterolateral portions of explanate margin..................................................................... 2

— Elytral disc rugosely punctate without distinct tubercles; explanate elytral margin entirely pale..... 3

2. Dark dorsal coloration piceous, coverage on explanate margin extensive, leaving small pale spot at midlength and before suture; body larger, length 4.56–6.4 mm (avg. = 5.69 mm, n = 16)............................................................................... P. rugosa (Boheman)

— Dark dorsal coloration brownish, coverage on explanate margin minimal, leaving large pale spot at midlength and before suture; body smaller, length 4.0– 5.36 mm (avg. = 4.81 mm, n = 19)........... .................................................................. P. callosa (Boheman)

3. Disc of pronotum with pair of dark maculae, elytral disc and metasternum often with dark smudges; body slightly larger, length 4.8–6.4 mm (avg. = 5.55 mm, n = 12)....... P. arenaria Riley , n. sp.

— Disc of pronotum immaculate, elytral disc and metasternum entirely pale; body slightly smaller, length 4.7–5.6 mm (avg. 5.13 mm, n = 16)..................................... P. sublaevis Barber