Key to the species of Hyleoglomeris currently known to occur in Thailand, chiefly based on male characters:

1. Thoracic shield and pygidium cream-brown, each with a pair of dark spots, not contrasting with cream-brown segments 3–11............................................................................................ H. siamensis

- Thoracic shield and pygidium without a pair of contrasting dark spots............................................ 2

2. Background coloration of terga 3–11 dark with lighter pattern/markings.......................................... 4

- Background coloration of terga 3–11 yellowish with a contrasting dark pattern..................................... 3

3. Terga 2–11 with contrasting brown bands in caudal parts of terga 2–11 (Fig. 3 A & C)..................... H. aurea sp. n.

- Terga 3–11 with a contrasting pair of paramedian, dark triangles at caudal margin and a dark axial stripe (Fig. 3 D & E)............................................................................................. H. cavicola sp. n.

4. Collum dark.......................................................................................... 5

- Collum yellowish to pallid.............................................................................. 6

5. Thoracic shield almost all yellowish to pallid......................................................... H. cremea

- Thoracic shield almost dark with a yellowish posterolateral corner...................................... H. albicollis

6. Thoracic shield almost dark with a thin, yellow-whitish, axial stripe..................................... H. montana

- Thoracic shield almost all yellowish to pallid with a wider axial stripe (Fig. 1 A–F)............... H. hongkhraiensis sp. n.