Key to the species of Carrhotus in Sri Lanka

1. Males (males of C. albosetosus sp. nov. unknown) .......................................................................... 2

– Females (females of C. lobatus sp. nov. unknown) .......................................................................... 6

2. PLP with two lobes (Figs 8C, 9A) ........................................................... Carrhotus lobatus sp. nov.

– PLP with single lobe ......................................................................................................................... 3

3. Embolus straight ............................................................................................................................... 4

– Embolus curved ................................................................................................................................ 5

4. Embolus long, acuminate, RTA as in Figs 11G–H, 12B ................ Carrhotus silanthi (Caleb, 2020)

– Embolus short, acute, RTA as in Figs 13F, 14B ................... Carrhotus taprobanicus (Simon, 1902)

5. Embolus tapered, RTA tapered (Fig. 7D) ................................ Carrhotus viduus (C.L. Koch, 1846)

– Embolus bow-shaped, RTA stout (Figs 6E, 7D) ....................................... Carrhotus atratus sp. nov.

6. CD and FD prominent ...................................................................................................................... 7

– CD and FD not prominent ................................................................................................................ 9

7. Spermathecae boat-shaped, CD hook-shaped (Fig. 7D) ........................... Carrhotus atratus sp. nov.

– Spermathecae kidney-shaped, CD otherwise ................................................................................... 8

8. ML prominent (Figs 15G, 16C–D) .......................................... Carrhotus viduus (C.L. Koch, 1846)

– ML less prominent (Figs 13G, 14C–D) ............................... Carrhotus taprobanicus (Simon, 1902)

9. ML and CO as in Fig. 4A, D ............................................................. Carrhotus albosetosus sp. nov.

– ML and CO as in Fig. 12C–D ........................................................ Carrhotus silanthi (Caleb, 2020)