Key to the subfamilies of Syarinidae

1 Pedipalpal apex rounded, usually with 2 setae (seldom 3); male sternite IV with cribrate areas; male genital atrium without glandular setae; trichobothrium isb on paraxial face of fixed finger; junction between femur and patella of leg IV strongly oblique; subterminal setae of tarsi acuminate....................... Syarininae (Genera: Anysrius, Syarinus).

- Pedipalpal apex triangular, with 2 setae; male sternite IV without cribrate areas; male genital atrium with 1–3 pairs of glandular setae; trichobothrium isb on antiaxial face of fixed finger or on hand; junction between femur and patella of leg IV slightly oblique or perpendicular; subterminal setae of tarsi usually dentate................................... 2

2 Tergites and sternites X–XI extremely reduced in size; trichobothrium it far distad of et; stigmata with only one microseta or none.............................................................................. Arcanobisiinae (Genus: Arcanobisium gen. nov.)

- Tergites and sternites X–XI of normal size; trichobothrium it basal to et, or occasionally level with et; stigmata with 2 or more setae .............................................................................................................................................................. 3

3 Movable cheliceral finger without galea; male sternite VI usually with gland openings area (seldom absent) ............ ............................................................... Chitrellinae (Genera: Aglaochitra, Chitrella, Pararoncus, Pseudoblothrus).