1a	Metasoma mostly or entirely melanic	2
1aa	Metasoma mostly or entirely pale, yellow, orange, or reddish brown	4
2	Forewing evenly and deeply infuscate	Lytopylus vaughntani sp. n.
2aa	Forewing mostly hyaline, sometimes weakly infuscate basally	3
3a	Notauli sculptured with crenulae in anterior half	Lytopylus bradzlotnicki sp. n.
3aa	Notauli mostly or entirely smooth in anterior half	Lytopylus rebeccashapleyae sp. n.
4a	Median syntergite 2+3 forming a carapace that almost covers all more posterior terga; posterior margin of median syntergite 2+3 convex; 4b. median areola of propodeum well-defined and smooth with a rounded anterior border	11
4aa	Median syntergite 2+3 not forming a carapace that almost covers all more posterior terga; posterior margin of median syntergite 2+3 straight; 4bb. median areola of propodeum not as above, either pentagonal or triangular with sharp angles, or absent	5
5a	Forewing banded	Lytopylus sandraberriosae sp. n.
5aa	Forewing not banded, mostly or entirely infuscate	6
6a	Mesoscutum mostly or entirely pale, orange or reddish yellow	7
6aa	Mesoscutum mostly or entirely melanic	8
7a	Propodeum mostly smooth, lacking areolae	Lytopylus flavicalcar (Enderlein)
7aa	Propodeum sculptured with areolae	Lytopylus robpringlei sp. n.
8a	Hind leg almost entirely black	9
8aa	Hind leg reddish in large part, either coxa or femur or both reddish	10
9a	Occiput relatively sharply angled at mid-height	Lytopylus gregburtoni sp. n.
9aa	Occiput evenly rounded	Lytopylus colleenhitchcockae sp. n.
10a	Gena acute posterolaterally; 10b. median syntergite 2+3 not heavily sculptured	Lytopylus jessicadimauroae sp. n.
10aa	Gena rounded or obtuse posteroventrally; 10bb. median syntergite 2+3 heavily sculptured	Lytopylus macadamiae (Briceño and Sharkey)
11a	Third lobe of median syntergite 2+3 entirely striate	Lytopylus jessiehillae sp. n.
11aa	Third lobe of median syntergite 2+3 smooth, at least posteriorly	Lytopylus mingfangi sp. n.