Key to species of Aphropsylla

1 Males .......................................................................................................... 2

– Females (unknown for A. wollastoni)........................................................... 4

2 Apex of P1 rounded, not truncate. Length of P1 greater than 2.5 times its widest dimension (Figs. 8, 9) ...................................................................... 3

– Apex of P1 greatly expanded and truncate. Length of P1 less than 1.5 times its widest dimension (Fig. 7)............................................ A. truncata, sp. n.

3 Genal comb usually with six or seven ctenidia (Fig. 3) .................................. .................................................. A. conversa (Jordan & Rothschild, 1913)

– Genal comb with 10 or 11 ctenidia (Fig. 4) .................................................. ................................................................ A. wollastoni (Rothschild, 1908)

4 First genal tooth (cephalad) nearly as long as adjacent tooth. Ventral anal lobe rounded at apex and setae restricted to apical third. Tergum eight with

distinct sinus subtended by group of setae (Fig. 11). Second segment of labial palpus longer than proximal segment............................................................ .................................................. A. conversa (Jordan & Rothschild, 1913)

– First genal tooth <1/2 the length of adjacent tooth. Ventral anal lobe oblique at apex and setae covering apical half. Tergum eight without sinus, but rounded with sinuate margin (Fig. 10). Second segment of labial palpus equal in length to proximal segment ......................................... A. truncata, sp. n.