KEY TO SPECIES FROM BRAZIL AND THE WEST INDIES

1. Males (those of A. malkini, A. caninde, and A. gorda unknown).................. 2

– Females........................ 4

2. Embolus arrow shaped (fig. 576).... simla

– Embolus otherwise................ 3

3. Embolus with two ventrally directed projections (fig. 587)............... villalba

– Embolus with distally directed projections (fig. 565)..................... belem

4. Anterior genitalic process long, T-shaped (fig. 578)...................... simla

– Anterior genitalic process otherwise.... 5

5. Basal sclerite narrow, triangular, longer than anterior genitalic process (fig. 551).. gorda

– Basal sclerite otherwise............. 6

6. Anterior genitalic process with anterior expansion (figs. 544, 545)......... malkini

– No anterior expansion.............. 7

7. Posterior tibiae and metatarsi with spines; anterior genitalic process apparently absent (figs. 588, 589)............... villalba

– Posterior legs without spines; anterior genitalic process obvious............... 8

8. Basal sclerite reaching to two-thirds of length of anterior genitalic process (fig. 556)........................... caninde

– Basal sclerite reaching only to about half of length of anterior genitalic process (fig. 567)........................ belem