Key to adult females of Phyllogomphoides from Mexico

1 Vulvar lamina with a posterodorsal tubercle (Figs. 119–120, 123–124, 127–128, 139–140)........................... 2

1’ Vulvar lamina without a posterodorsal tubercle (Figs. 121–122, 125–126, 129–138)................................ 5

2(1) Foliation on S8 poorly to moderately developed (0.10–0.43 mm width), foliation on S9 straight (Figs. 110, 112, 118); S8–9 black dorsally (Figs. 110, 112, 118); cerci basally dark brown; vulvar lamina variable, its posterodorsal margin more or less straight; three or five pale stripes on pterothorax............................................................. 3

2’ Foliation on S8 well-developed (0.62–1.0 mm width), foliation on S9 strongly convex at middle (Fig. 108); S8–9 with a large, apical, yellow spot on dorsolateral surface (Fig. 108); cerci yellow; vulvar lamina V-shaped (Fig. 119–120), light reddishbrown, its posterodorsal margin strongly concave; five pale stripes on pterothorax.......................... P. albrighti

3(2) Five pale stripes on pterothorax; vulvar lamina V-shaped, reddish-brown, tips separated each other by a distance equal or shorter than basal width of each lobe (Figs. 127, 139)............................................................ 4

3’ Three pale stripes on pterothorax (Fig. 19); vulvar lamina widely U-shaped, black, tips separated each other by a distance shorter than basal width of each lobe (Figs. 123–124).................................................. P. bifasciatus

4(3) Cercus shorter than dorsal length of S9, its basal 0.16 blackish-brown, remaining creamy pale; tip of lobes of vulvar lamina separated each other by a distance shorter than the basal width of each lobe, posterodorsal margin straight with a large (0.08 mm length), digitiform, blunt tubercle directed dorsolaterally (Figs. 127–128); posterior margin of lateral ocelli with a twin tubercle................................................................................. P. duodentatus

4’ Cercus longer than dorsal length of S9, its basal 0.50 blackish-brown, remaining creamy pale; tip of lobes of vulvar lamina separated each other by a distance equal to basal width of each lobe, posterodorsal margin with a short (less than 0.08 mm length), wide, rounded tubercle directed dorsolaterally (Figs. 139–140); posterior margin of lateral ocelli with a single tubercle................................................................................................... P. suasus 5(1’) Foliation on S8 moderately to well-developed, maximum width usually more than 0.25 mm, its ventral margin spiny (Figs. 109, 111, 113, 114, 116, 117)................................................................................ 6

5’ Foliation on S8 poorly developed, maximum width less than 0.2 mm, its ventral margin smooth and straight (Fig. 115)................................................................................................. P. pacificus

6(5) Foliation on S8 with posterior lobe not surpassing basal margin of S9 (Figs. 114, 116)............................... 7

6’ Foliation on S8 with posterior lobe surpassing basal margin of S9 (Figs. 109, 111, 113, 117).......................... 8

7(6) Three pale stripes on pterothorax; – widely U-shaped, lobes black foliation, trapezoid on S8, tips well-developed truncate, separated, maximum each width other by 0.6a distance 0.7 mm (shorter Fig. 114 than); lobes basal of width vulvar of each lamina lobe (Figs. 131–132)................................................................... P. nayaritensis

7’ Five pale stripes on pterothorax; foliation on S8 moderately developed, maximum width 0.25–0.32 mm (Fig. 116); lobes of vulvar lamina widely V-shaped, triangular, reddish-black, tips separated each other by a distance greater than basal width of each lobe (Figs. 135–136)...................................................................... P. pugnifer

8(6’) Inferior margin of S8–10 reddish-black to black; vulvar lamina blackish-brown; cerci creamy pale, usually dark brown at extreme base (Figs. 109, 111, 113).......................................................................... 9

8’ Inferior margin of S8–9, and S10 mostly or completely light yellowish-brown; vulvar lamina reddish-brown; cerci yellow (Fig. 117)...................................................................................... P. stigmatus

9(8) Foliation on S8 increasing suddenly in width caudally, inferior margin strongly convex (Figs. 109, 111)................ 10

9’ Foliation on S8 increasing gradually in width caudally, inferior margin more or less straight (Fig. 113); basal third of cerci dark brown.......................................................................................... P. luisi

10(9) Cerci shorter than dorsal length of S9, dark brown at extreme base; S10 yellowish-red dorsolaterally, ventrally black (Fig. 109); lobes of epiproct black........................................................................ P. apiculatus

10’ Cerci as long or little longer than dorsal length of S9, creamy pale; S10 light yellowish-brown ventrally reddish-black (Fig. 111); lobes of epiproct dark reddish-brown with a large, yellow, apical, oval spot............................ P. danieli