Hister impunctatus Ôsawa, 1952
Hister (Hister) impunctatus Ôsawa, 1952: 6 [Japan: Myôken, Ôsaka, Honshû].
Hister impunctatus: Mazur, 1984: 190 [catalogued].
Japanese name: Tsuya-emma-mushi.
Original description.
"Oval convex, black and shining; head somewhat convex; frontal stria complete and impunctate; mandibles feebly concave; prothorax, striae impunctate except frontal part, inner stria complete, outer abbreviated behind the middle; striae of elytra neither punctured nor crenulated, striae 1-3 complete, 4 shortened at the base, 5 apical, sutural dimidiate but reached at the middle of elytra, humeral very feeble and sulciform, subhumeral wanting; mesosternum marginate and very feebly sinuous in front; anterior tibiae 4-dentate, apical tooth bifurcate.
Body length: 4 mm.
This species is somewhat similar to Hister sutus Lewis in sculpture, but may be distinguished from the latter by the shortened stria of thorax, absence of subhumeral stria and very feebly sinuated frontal margin of mesosternum.
Type: 1 ex., Myoken, Osaka-fu, Honshû, Japan, 14.VI.1943, S. Eda leg.