Key to Apocephalus analis group species (females only).

1. Anepisternum with pair of large setae (Fig. 54)............................................. A. amenti new species

- Anepisternum without large setae......................................................................... 2

2 Venter of segment six with comblike row of closely-placed setae (Figs. 10–12)..................................... 3

- Venter of segment six lacking comblike row of setae.......................................................... 5

3. Hind tibia with two setal palisades (Fig. 3)............................................... A. bilineatus new species

- Hind tibia with one setal palisade......................................................................... 4

4. Segment six ventrally with hooklike spines, in addition to dense setae (Fig. 11)................... A. comatus Borgmeier

- Segment six ventrally with dense setae and few straight, long, thick setae (Fig. 112)............ A. rectilineatus new species

5. Venter of segment 6 with pair of short, thick, thornlike setae (Figs. 14–16)........................................ 6

- Venter of segment 6 lacking pair of short, thick, thornlike setae, but often with longer, thinner setae.................... 8

6. Thornlike setae close together, near midline (Fig. 16).................................... A. paracanthus new species

- Thornlike setae farther apart (Figs. 14, 15).................................................................. 7

7. Thornlike setae nearly in straight line with rectangular shiny area; with only short setulae along posterior margin of sternite 6 laterally....................................................................... A. euryacanthus new species

- Thornlike setae higher above shiny area (Fig. 12); with longer setulae along posterior margin of sternite 6 laterally....................................................................................... A. mexacanthus new species

8. Abdominal segments 3–6 each with long ventral setae; posterior margin of segment 6 with one incomplete row of ventral setae (Fig. 14)........................................................................ A. criniventris new species

- Abdominal segments 3–5 lacking long setae, although shorter setae often present; posterior setation of venter of segment 6 var- ious (Fig. 15)......................................................................................... 9

9. Venter of segment six with patch of dark shiny sclerotization around bases of largest medial setae; ventral setae relatively short (Figs 9, 13)....................................................................... A. holdenae new species

- Venter of segment six without shiny sclerotization; length of setae various, often long.............................. 10

10. Medial pair of posterior row of setae on venter of segment 6 close together (as in Fig. 27); ventral apex of oviscape only slightly curved ventrally near apex (as in Fig. 53)........................................................... 11

- Medial pair of setae separated by prominent gap relative to rest of row, or row widely spaced; ventral apex of oviscape in most species strongly and evenly curved ventrally (Fig. 52)........................................................ 13

11. Posterior row of setae on venter of segment six with medial pair slightly anterior to, and clearly shorter and smaller than, main row (Fig. 28)....................................................................... A. camarae new species

- Medial pair as large or larger than rest of row.............................................................. 12

12. Dorsal apex of oviscape flat (Fig. 37); abdominal segment 6 lacking large lateral seta (Figs. 37–38).................................................................................................. A. pittadearaujoi new species

- Dorsal apex of oviscape swollen relative to lateral areas (Fig. 26); large lateral seta present on segment 6 (Figs. 25, 27)........................................................................................... A. analis Borgmeier

13. Oviscape with relatively short thick pair of posterolateral setae that are much thicker than posterolateral setae of dorsum of

segment 6; setae of posterior row of segment 6 also relatively short, thick (Figs. 23–24)............ A. amorimi new species - Oviscape with relatively longer, thinner pair of posterolateral setae; setae of posterior row of segment 6 relatively longer, thinner................................................................................................ 14

14. Posterior row of setae on venter of segment 6 evenly spaced; setae on venter of intersegment 6–7 nearly as large as those of posterior row of segment 6 (Figs. 20, 36).................................................................. 15

- Posterior row of setae on venter of segment 6 with pronounced gap; intersegmental setae, if present, at most one half length of posterior row........................................................................................ 16

15. Ventral apex of oviscape broad, only slightly downturned (as in Fig. 53); ventral setae of segment 6 brown, relatively thin, evenly spaced; oviscape with long lateral seta at midlength (Figs. 35–36); dorsum of oviscape with pair of long setae at apical one third; anterior arms of stylet rounded, with medial projection (Fig. 50)........................ A. papei new species

- Ventral apex of oviscape evenly narrowed, pointed, strongly curved ventrally; venter of segment 6 with four thicker setae; oviscape without long lateral seta at midlength (Figs. 19–20); dorsum of oviscape with shorter setae at apical one third; anterior arms of stylet more parallel sided, with medial projection (Fig. 44)........................... A.amati new species

16. Dorsum of oviscape with pair of long dorsolateral setae at apical one third, plus smaller but still elongate setae to apex (Fig. 17)........................................................................ A. amacayacuensis new species

- Dorsum of oviscape with short dorsolateral seta only........................................................ 17

17. Posterior setae on venter of segment 6 with at least a few more anterior, smaller setae (Figs. 34, 39); medial gap large; oviscape strongly downturned at dorsal apex, appearing truncate....................................................... 18

- Posterior setae on venter of segment 6 in single row, without immediately more anterior, smaller setae (Figs. 33, 40, 41); oviscape straighter at dorsal apex, appearing broadly pointed..................................................... 19

18. Setae of posterior row relatively equal in size, with medial pair not greatly differentiated in thickness or length; medial gap extremely large; middle pair of more anterior setae not enlarged, not appearing to mirror middle pair of posterior row (Fig. 39)................................................................................. A. riccardae new species

- Setae of posterior row relatively unequal in size, with medial two pairs greatly longer and thicker than others (especially middle pair); medial gap more subtle; middle pair of more anterior setae enlarged, appearing to mirror middle pair of posterior row (Fig. 34).......................................................................... A. marinhoi new species

19. Venter of segment 6 with posterior row of 10 setae (Fig. 40); stylet with thin, bowed arms (Fig. 51).................................................................................................... A. strazhnikae new species

- Posterior row with 6–8 setae; anterior arms of stylet thicker, not bowed.......................................... 20

20. Posterior row of setae on venter of segment 6 larger, thicker, about one half length of oviscape (Figs. 41–42)............................................................................................. A. xavierfilhoi new species

- Posterior row of setae on venter of segment 6 smaller, thinner, about one quarter length of oviscape (Fig. 33).............................................................................................. A. gonzalezae new species