Identification key to the South American species of Purenleon

1. Mid tibia greatly swollen (Fig. 9d), distinctly broader than foretibia; basitarsus of hind leg about twice as long as greatest diameter; posterior margin of sternite VII in the female elongated laterally (Fig. 10f), like a small gonapophyses (tibialis gr oup)…….….….….….….….…….….….….….….….….….….….….….…...2

1’. Mid tibia weakly swollen (Fig. 2d), about equal in breadth to foretibia; basitarsus of hind leg at least 2.5 times longer than greatest diameter; sternite VII of female not produced laterally (Fig. 4b) (bistictus group)….….….….….….….….….….5

2. Thorax mostly dark brown (Fig. 7d)…….….….….….….….….….….….….…. 3

2’. Thorax mostly yellow (Fig. 9b)............................................................................ 4

3. Forewing with small brown marks on the base of most radial crossveins; mid tibia mostly dark brown with light brown areas; male parameres not dorsally enlarged and with apex sclerotized and rough; female with pregenital plate reduced…….….….….….….….….….….….….….….….….….….. P.fernandezi

3’. Forewing without small brown marks on the base of most radial crossveins (Fig. 9b); mid tibia mostly yellow with dark brown marks (Fig. 9d); male parameres dorsally enlarged (forming a dome) (Fig. 10b) and with apex not sclerotized; female pregenital plate large and ventrally extended (Fig. 10f)…….….….. P. rafaeli sp. n.

4. Pronotum with several elongate white setae at lateral margin, at least subequal in length to those on forecoxa; mid tibia mostly dark brown, with few yellow areas; male mediuncus absent and paramere not folding apically …….….….…. P. tibialis

4’. Pronotum with few elongate white setae at lateral margin, shorter than those on forecoxa; mid tibia yellow with small rounded dark marks on the base of the long setae (Fig. 7b); male mediuncus present and paramere folding apically (Fig. 8d)…….….….….….….….….….….….….….….….….. P. limeirai sp. n.

5. Forewing with posterior Banksian line clearly evident; hind wing with a longitudinal apical brown mark (Fig. 6)…….….….….….….….….….….….….….. P.nebulosus

5’. Forewing posterior Banksian line not evident; hind wing without a longitudinal apical brown mark (Fig. 3) …….….….….….….….….….….….….….….…..6

6. Area between antennae yellow (Fig. 2a); forefemur set with some short black setae; male ectoproct with postventral lobe (Fig. 3)…….….….….….….….….. P. cautus

6’. Area between antennae dark brown; forefemur covered with many medium sized black or white setae; male ectoproct without postventral lobe …….….….….…..7

7. Pronotum with several elongate white setae at lateral margin, at least subequal in length to those on forecoxa; male paramere with apex without a concave excavation…….….….….….….….….….….….….….….….….…..… P. andinus

7’. Pronotum without elongate white setae at lateral margin, sometimes one or two moderately long white setae; male paramere with an apical concave excavation…….….….….….….….….….….….….….….….….…….. P. clavatus