Key to the species of Narberdia

1. Rostrum moderately curved; upper edge of eyes strongly separated from head; antennal scape shorter than length of funicular segments and club combined; profemoral tooth small, acutely pointed; mesocoxae separated by distance ½ width of coxa...2

- Rostrum slightly curved; upper edge of eyes slightly or not separated from head; antennal scape longer than length of funicular segments and club combined, profemoral tooth large; mesocoxae separated by distance less than ½ width of coxa......... 3

2. Elytral intervals subequal in width to other intervals; funicular segment 1 longer than 2; profemoral tooth acute, slightly curved toward the tibiae; ventrite 5 as long as 4; metatibial mucro stout, strongly curved..................... N. sarukhani n. sp.

- Elytral intervals 3 and 5 wider than other intervals; funicular segments 1 and 2 subequals in length; ventrite 5 shorter than 4; profemoral tooth triangular, not curved; metatibial mucro shorter than tarsal claw, straight, acute......... N. aridulus Burke

3. Funicular segments 1 and 2 subequal in length; profemoral tooth with inner margin slightly curved toward tibia; protibia with inner margin moderately prominent in basal half; female rostrum about 3x longer than length pronotum along midline............................................................................................ N. cervantae n. sp

- Funicular segment 1 longer than 2; profemoral tooth triangular in shape; protibia with inner margin slightly prominent in basal half; female rostrum about 2.2x longer than length pronotum along midline........................................4

4. Upper edge of eyes slightly separated from head; profemoral tooth wider than long; ventrite 2 longer than 1; male median lobe subparallel-sided in basal half then gradually narrowed and expanded apically, apex arrowhead shape (Fig. 12)................................................................................................... .. N. dugesi n. sp.

- Upper edge of eyes not separated from head; profemoral tooth acute, longer than wide; male median lobe broad, sides slightly curved from base to apical ¾ then narrowed and slightly expanded apically, apex acute (Fig. 15).......... N. ramuvei n. sp.