1. Apical segment of posterior tarsi
strongly swollen distally….. 2
Apical segment of posterior tarsi not swollen….. 7
2. Elytra punctate-striate or punctate-substriate….. 3
Elytral punctures confused….. 5
3. Elytra densely pubescent….. 4
Elytra glabrous….. Pachyonychus
4. Procoxal cavities open, vestiture of appressed green setae…..
Pseudolampsis
Procoxal cavities closed, pubescence erect or suberect, of long brown
or gray setae….. Distigmoptera
5. All tarsal claws appendiculate; pronotal width subequal to twice
its length at middle….. 6
Posterior tarsal claws not appendiculate, pronotal width subequal to
2/3 its length at middle….. Pachyonychis
6. Size large (4.0-8.0 mm.), convex; lateral margins narrow or lacking;
antennae moderately stout, usually less
than 1/2 the body length; front vertical; eyes small, distant (interocular
space 1/2 width of head); interocular
depression indistinct….. Kuschelina
Size small (3.0-6.0 mm.), depressed; lateral margins explanate; antennae
slender, at least 1/2 body length; front
oblique; eyes often large, closely set (interocular space usually less
than 1/2 width of head); interocular depression
distinct….. Capraita
7. Apical spur of posterior tibiae terminating in single point…..
8
Apical spur of posterior tibiae distally bifurcate or broadly truncate…..
Dibolia
8. Antennae 11-segmented….. 9
Antennae 10-segmented….. Psylliodes
9. Tarsal claws simple or appendiculate….. 10
Tarsal claws bifid….. Blepharida
10. Pronotum with prebasal transverse impression, or with short, paired,
latero-basal, longitudinal impressions,
or with both transverse and longitudinal impressions….. 11
Pronotum lacking distinct impressions….. 22
11. Elytral punctation confused….. 12
Elytra regularly punctate-striate….. 15
12. Prebasal transverse pronotal impression not laterally delimited
by longitudinal furrows….. 13
Prebasal transverse pronotal impression interuppted by longitudinal
lateral impressions running to base…..
Monomacra
13. Color dark, usually metallic; green, blue, purple, bronze, or brown-blue…..
14
Color deep red or orange-brown with antennae, scutellum, legs and venter
usually black or dark brown….. Strabala
14. Prebasal pronotal impression consisting of a pair of distinctly
impressed lateral arches; setae of anterior
pronotal angles placed somewhat caudad of angle….. Syphraea
Prebasal pronotal impression a single weakly impressed, continuous transverse
arch; setae of anterior pronotal angles
placed in the angle….. Altica
15. Procoxal cavities closed….. 16
Procoxal cavities open….. Hornaltica
16. Elytra pubescent….. 17
Elytra glabrous (apical margin occasionally with a few setae)…..
18
17. Prebasal transverse pronotal impression laterally interrupted by
short longitudinal impressions; on Solanaceae…..
Epithrix
Prebasal transverse pronotal impression not laterally interrupted by
short longitudinal impressions; on Rhus
sp.….. Orthaltica
18. Pronotum with prebasal transverse impression….. 19
Pronotum lacking prebasal transverse impression but having pair of short,
lateral, basal longitudinal sulci…..
Mantura
19. Prebasal transverse pronotal impression laterally interrupted by
short longitudinal impressions…..
20
Prebasal transverse pronotal impression not laterally interrupted by
short longitudinal impressions; on Rhus
sp.….. Orthaltica
20. Elytra glabrous….. 21
Elytra pubescent….. Epithrix
21. Color shining black or dull yellow-brown without metallic luster…..
Epithrix
Color metallic green, blue, purple, bronze; or dull yellow-brown with
faint green luster along suture near scutellum…..
Crepidodera
22. Elytra regularly punctate-striate….. 23
Elytra impunctate, or very faintly punctate-striate, or with punctures
confused….. 24
23. Middle and posterior tibiae with corbel….. Chaetocnema
Middle and posterior tibiae without corbels….. Glyptina
24. Anterior coxal cavities open..... 25
Anterior coxal cavities closed..... Systena
25. Basal posterior tarsal segment shorter than 1/2 length of hind tibia.....
26
Basal posterior tarsal segment long (greater than 1/2 length of hind
tibia)..... Longitarsus
26. Longer than 3 mm...... 27
Shorter than 3 mm...... 29
27. Frons with prominent calli surmounted by distinct sulci, frons unevenly
punctate; pronotum pale or dark; elytra
not vittate..... 28
Frontal calli reduced, lacking distinct superior sulci, frons usually
evenly punctate; pronotum completely dark;
elytra entirely dark, or each with sinuous vitta, or vittae reduced
to 2 spots..... Phyllotreta
28. Elytra impunctate to vaguely punctate-striate; frontal calli small,
separated by faint line..... Aphtona
Elytra irregularly punctate, frontal calli separated by distinct impression.....
Palaeothona
29. Elytra not vittate..... 30
Elytra vittate..... Disonycha
30. Color not red or orange-brown (if pale in this manner than appendages
and scutellum also pale)..... 31
Color deep red or orange-brown with antennae, scutellum, legs and venter
usually dark..... Strabala
31. Anterior tibiae without apical spurs..... 33
Anterior tibiae with apical spur..... 32
32. Prebasal pronotal impression consisting of a pair of distinctly
impressed lateral arches; setae of anterior
pronotal angles placed somewhat caudad of angle..... Syphraea
Prebasal pronotal impression of a single weakly impressed, continuous
transverse arch; setae of anterior pronotal
angles placed in the angle..... Altica
33. Pronotum widest at middle, mesosternum truncate at apex between
middle coxae..... Luperaltica
Pronotum usually widest at base, mesosternum emarginate at apex between
middle coxae..... Disonycha