Chinavia Orian

Type Species: Rhaphigaster pallidoconspersus StDl, 1858, by original designation.

Tribal Placement: This genus has usually been considered to be closely related to the genus Nezara, the type genus of the Nezarini.

Comments: The species listed above have traditionally been treated as members of the genus Acrosternum. True species of the genus Acrosternum, however, are smaller, pale green in color, and live in dry, arid regions of the Old World. Members of the genus Chinavia are larger, more deeply and richly green in color, and live in temperate or tropical area of both the Old and New Worlds.

1 Humeral angles of pronotum spinose	2
- Humeral angles not acute (except rarely in punctatorugosa)	3

2(1) Body elongate; head with black spot between eyes and antennal tubercles	acuta (Dallas)
- Body broad, ovate; head between eyes and antennal tubercles immaculate	dispar (Schouteden)

3(1) Ventral spine at base of abdomen elongate, extending at least to middle coxae	4
- Ventral spine at base of abdomen short, extending at most slightly beyond hind coxae	8

4(3) Ventral spine at base of abdomen extendint to or beyond fore coxae	macrorhaphis (Horváth)
- Ventral spine at base of abdomen shorter	5

5(4) Pronotum and scutellum with numerous small whitish callosities	6
- Upper surface without pale callosities	7

6(5) Lateral margins of head and pronotum on upper surface red, on under surface black; upper surface subopaque, with very dense and rugose microsculpturing, especially on pronotum	punctatorugosa (Stål)
- Lateral margins of head and pronotum pale yellowish; upper surface shiny, microsculpturing relatively faint	pallidoconspersa (Stål)

7(5) Small species, length 13-14mm; shiny	varicornis (Dallas)
- Large, broadly ovate species, length greater than 15mm; upper surface opaque, with very dense and rugose micorsculpturing, especially on pronotum; lateral margins of pronotum, elytra, and abdomen pale	distans (Schouteden)

8(3) Ventral spine at base of abdomen narrow, plug-shaped, extending slightly beyond hind coxae; large species, with lateral margins of head, pronotum, elytra, and abdomen contrastingly orange	limbosa (Horváth)
- Ventral spine at base of abdomen triangular, extending at most to middle of hind coxae; coloring different	9

9(8) Head sharply triangular, convex; rest of upper surface flat, without pale callosities; paratergites unicolored, pale	amosi (Linnavuori)
- Head broadish, flat; rest of upper surface convex, with small pale callosities; apical angles of paratergites black	10

10(9) Large species, length 15mm	fieberi (Stål)
- Small species, length about 13mm	rinapsus (Dallas)

David A. Rider
Professor of Entomology
North Dakota State University
E-Mail: David.Rider@ndsu.edu