Pachyschelus, Solier, 1833

Hespenheide, Henry A., 2003, A Reconsideration of Pachyschelus schwarzi Kerremans and a Review of American Pachyschelus North of MÉxico (Coleoptera: Buprestidae), The Coleopterists Bulletin 57 (4), pp. 459-468 : 460

Key to US Pachyschelus

1 Elytra with patches of condensed setae; bicolored - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2

1 9 Elytra glabrous or inconspicuously and uniformly setose; bicolored or uniformly black or blue - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 4

2 Pronotum cupreous and elytra blue; Texas, host: Bernardia sp - - - - - P. fisheri Vogt

2 9 Pronotum black and elytra blue or reddish-purple - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 3

3 Elytra bright blue; widespread, host: Geranium spp - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - P. purpureus purpureus (Say)

3 9 Elytra reddish-purple; Texas, host: Acalypha sp - - - - - - - P. purpureus uvaldei Knull

4 Color uniformly black; widespread in eastern North America; hosts: Desmodium spp. , Lespedeza spp - - - - - - - - - - - - P. laevigatus (Say) , P. confusus Wellso and Manley

4 9 Color uniformly blue or elytra blue and pronotum black - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 5

5 Color uniformly blue; South Carolina to Florida; hosts: Desmodium , Lespedeza , Psoralea - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - P. vogti new species

5 9 Bicolored: head and pronotum black and elytra blue - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 6

6 Pronotum with lateral margins conspicuously shagreened and golden; Colorado and Arizona to México; host: Desmodium spp - - - - - - - - - - - - - - - - - - - - P. secedens Waterhouse

6 9 Pronotum uniformly black, some specimens with bluish reflections, usually not or inconspicuously shagreened; North Dakota to Texas and eastward - - - - - - - - - - - - - - - - - - - 7

7 Head from above with sharply angulate inner margins to eyes and conspicuous medial depression; Florida and Georgia - - - - - - - - - - - - - - - - - - - - - - - - - P. schwarzi Kerremans

7 9 Head from above with eyes rounded and medially transverse; widespread in eastern North America; hosts: Apios , Wisteria - - - - - - - - - - - - - - - - - - - - - - - - - - - P. nicolayi Obenberger