Apristus, Chaudoir, 1846

Felix, Ron F. F. L., 2017, New species and new distributional data on Carabidae (Coleoptera) from the Socotra Archipelago, Acta Entomologica Musei Nationalis Pragae (Acta. Ent. Mus. Natl. Pragae) 57, pp. 41-54 : 49

Key of Apristus in Socotra and adjacent countries

1 Median furrow of pronotum wide and gutter-like throughout. Eyes relatively small, temples long. ....................................................................................................................... 2

– Median furrow over most of its length narrow and sharply engraved, only wider at base and there more or less gutter-like. Eyes rather big, temples short. ............................... 4

2 Microsculpture on head, pronotum and elytra very strong and deep, therefore duller in appearance. Transition from temples to neck gradual. Sinuation of sides of pronotum near base rather long. Elytra light red or light brownish yellow. Antennomere IV less than three times longer than wide. Metatarsomere I of equal or shorter than metatarsomeres II and III together. ............................................................................................... 3

– Microsculpture on head, pronotum and elytra shallow and more less pronounced, therefore distinctly shiny in appaerance. Transition from temples to neck well marked. Sinuation of sides of pronotum short. Elytra brown red. Antennomere IV 3.3 times longer than wide. Metatarsomere I longer than metatarsomeres II and III together. .................. .................................................................................................... A. dioscoridus sp. nov.

3 Pronotum narrower, lateral border near anterior angles less curved, anterior angles strongly protruding, pointed. Basal border of elytra at shoulders evenly rounded. Eyes less protruding. Elytra light coppery red. Legs uniformly red. ........................................ .............................................................................................. A. boldorii ( Straneo, 1943)

– Pronotum wider, lateral border of pronotum strongly curved inwards in apical part, anterior angles less protruding. Basal elytral border at shoulders nearly straight. Eyes more protruding. Elytra brownish yellow. Femur much lighter than tibia. ............................... .................................................................................................. A. arabicus Mateu, 1986

4 Pronotum without strong wrinkels. Posterior angles of pronotum obtuse, not pointed; sinuation of lateral margins longer. Elytral striae weaker, intervals nearly flat. .............. ........................................................................................... A. subovatus Chaudoir, 1876

– Pronotum strongly wrinkled. Posterior angles of pronotum rectangular and pointed, protruding; sinuation of sides near base shorter. Elytral striae deeper, intervals convex. ..... ........................................................................................... A. latipennis Chaudoir, 1878