Antherophagus, Dejean, 1821

Kole, John Paul & Ivie, Michael A., 2023, New US State and County Records for Members of the Genus Antherophagus Dejean, 1821 (Coleoptera: Cryptophagidae) with Notes on Biology, The Coleopterists Bulletin 77 (3), pp. 307-318 : 309-310

KEY TO ADULTS OF NEARCTIC ANTHEROPHAGUS

1. Color uniformly pale, yellow, or golden, excepting darker margins of legs or antennal insertions ( Figs. 1–8 , 12–20 ); densely clothed in either gold or white pubescence; size> 4 mm; pronotum transverse, as wide as elytra; male with clypeal notch widely open, approximately as wide as or wider than scape ( Figs. 4, 8 , 18 ) ..............................................2

1′. Color variable, typically dark brown or reddish brown, but if pale, not uniformly so ( Figs. 9–16 ); clothed in transparent pubescence; size <3.5 mm; pronotum quadrate, narrower than elytra; male with clypeal notch narrowly open, much narrower than scape ( Figs. 10, 14 ).........4

2(1). Anterior notch of male clypeus angulate posteriorly, not semicircular ( Fig. 18 ); female with anterior margin of clypeus shallowly emarginate ( Fig. 20 ); central Mexico................................. A. ruficornis Grouvelle

2′. Anterior notch of male clypeus rounded posteriorly, semicircular; female with clypeus not emarginate ( Figs. 4, 8 ); widespread US and Canada, not known from Mexico.................3

3(2). Pubescence of elytra and pronotum golden ( Figs. 1–4 ); clypeal notch of male more acutely rounded near apex, slightly smaller than scape ( Fig. 2 )......... A.ochraceus Melsheimer

3′. Pubescence of elytra and pronotum silver or white; clypeal notch of male broadly rounded posteriorly, slightly larger than scape ( Fig. 6 ) ................................... A. pallidivestis Casey

4(1). Overall coloration, including head, uniform reddish brown; legs concolorous with thorax ( Figs. 13–16 ) ........... A. convexulus LeConte

4′. Overall coloration variable, most often dark brown except anterior half of head yellow ( Figs. 9–12 ), never reddish brown; legs usually lighter than thorax........... A. suturalis Mäklin

Figures

Figs. 1–8. Antherophagus ochraceus: 1) Male, dorsal view; 2) Male, head; 3) Female, dorsal view; 4) Female, head. A. pallidivestis: 5) Male, dorsal view; 6) Male, head; 7) Female, dorsal view; 8) Female, head. Scale bars = 1.0 mm.

Figs. 9–16. Antherophagus suturalis: 9) Male, dorsal view; 10) Male, head; 11) Female, dorsal view; 12) Female, head. A. convexulus: 13) Male, dorsal view; 14) Male, head; 15) Female, dorsal view; 16) Female, head. Scale bars = 1.0 mm.

Figs. 17–20. Antherophagus ruficornis. 17) Male, dorsal view; 18) Male, head; 19) Female, dorsal view;