Hypseloecus

Key to Asian species of Hypseloecus

1. Antennal segment I entirely pale, sometimes tinged with pale red or only with a dark spot but not significantly infuscate... 2

- Antennal segment I widely or completely darkened........................................................... 7

2. Base and apex of antennal segment II darkened; from Philippines ..................................... ifugao Schuh

- Antennal segment II pale, sometimes tinged with pale red; from Indochina........................................ 3

3. Frons shiny black; labium not exceeding apex of mesocoxa...................................... sericosagus, n. sp.

- Frons dull, reddish brown or much paler; labium reaching apex of metacoxa....................................... 4

4. Metacoxa yellowish or whitish brown with a median, orange-pink spot.............................. castaneus, n. sp.

- Coloration of metacoxa widely reddish or darker............................................................. 5

5. All femora almost concolorously chocolate brown................................................ sakaerat, n. sp.

- At least some femora bicolorous, with dark (or reddish) and yellowish part....................................... 6

6. Ratio head width across eyes/ basal pronotal width> 0.85; mesofemur almost unicolorous red............. katrinae, n. sp.

- Ratio head width across eyes/ basal pronotal width <0.82; mesofemur dark brown, with apical 1/3 pale.... siamensis, n. sp.

7. Procoxa whitish or pale................................................................................ 8

- Procoxa widely dark brown or fuscous.................................................................... 9

8. Frons pale along inner margin of eye; mesocoxa wholly yellowish white............................. phuvasae, n. sp.

- Frons almost entirely chestnut brown; mesocoxa wholly darkened................................. schuhianus, n. sp.

9. Body larger, more than 3 mm in total length; antennal segment II yellow, with darkened apex; tibiae yellow with dark annula- tions; from Ryukyus, Japan ............................................................. takahashii Yasunaga

- Body smaller, less than 2.4 mm in length; antennal segment II and all tibiae concolorously dull grayish brown; from Indochina...................................................................................... nigrobrevis, n. sp.