Key to the males of Laemoglyptus Fairmaire, 1886 from Taiwan

1. Eyes small, ratio of an eye diameter to interocular space about 1:4.0; aedeagus: distal margin of ventral process notched, form- ing lateral angles...................................................................... L. sauteri (Pic, 1911)

- Eyes large, ratio of an eye diameter to interocular space about 1:1.6; aedeagus: ventral process tapered, with acute apex or dis- tal margin subtruncated and slightly rounded................................................................ 2

2. Aedeagus: distal margin of ventral process subtruncated and slightly rounded.............. L. taihorinensis Wittmer, 1984

- Aedeagus: ventral process tapered, with acute apex........................................................... 3

3. Aedeagus: distal margin of dorsal plate complete and sinuate; laterophyse distinctly divided into two parts................................................................................................ L. subspinosus Pic, 1910

- Aedeagus: distal margin of dorsal plate distinctly concave in middle; laterophyse not divided.......................... 4

4. The projections of antennae strongly broadened; aedeagus: laterophyse tapered, with acute apex....... L. grandis Pic, 1921

- The projections of antennae slightly or not broadened; aedeagus: laterophyse with rounded apex....................... 5

5. Aedeagus: the length of dorsal plate longer than the width of basal piece; ventral process narrower, with distal angle about 40°............................................................................ L. pingtungensis Wittmer, 1984

- Aedeagus: the length of dorsal plate shorter than the width of basal piece; ventral process broader, with distal angle about 60°................................................................................... L. chujoi Wittmer, 1972