| 1. |
A) |
Abdomen black with light reddish brown transverse bands on at least segment 2 and anterior half of segment 8 (Fig. B4.1). |
|
| B) |
Protarsomeres 2-5 reddish brown (Fig. B4.4). |
| |
[Additional character. Flagellum completely light reddish brown.] |
| |
|
. . . . . . . . 2 |
| – |
a) |
Abdomen black with or without white lateral spot on tergum 8 (Fig. B4.2), or partly to completely reddish brown but without light reddish brown transverse bands (Fig. B4.3). |
|
| b) |
Protarsomeres 2-5 black (Fig. B4.5). |
| |
|
. . . . . . . . 4 |
 |
| 2(1). |
A) |
Abdominal segment 7 light reddish brown (may be black at side) and segment 9 black (Fig. B4.6) or almost completely light reddish brown. |
|
| B) |
Pronotum black (Fig. B4.8). |
| C) |
Metatibia almost completely light reddish brown except for brownish spot on medial surface in apical 0.2 (Fig. B4.10). |
| D) |
Vertex covered with densely spaced pits (Fig. B4.12). |
| |
|
. . . . . . . . 3 |
| – |
a) |
Abdominal segment 7 black and segment 9 with light reddish brown transverse band in apical 0.5 (Fig. B4.7). |
|
| b) |
Pronotum reddish brown (Fig. B4.9). |
| c) |
Metatibia mostly black except for a yellowish transverse band in basal 0.3 (Fig. B4.11). |
| d) |
Vertex mostly smooth with few pits except along posterior edge of eye, just behind ocelli and on median longitudinal furrow (Fig. B4.13). |
| |
|
Urocerus sah (Mocsáry, 1881) |
|
| 3(2). |
A) |
Tergum 8 entirely, tergum 9 in posterior half and tergum 10 (except posterolateral corners in some specimens) light reddish brown (Fig. B4.14). |
|
| B) |
Sheath with apical section more than 1.52 times as long as basal section (if between 1.31 and 1.52, use A). |
| |
|
Urocerus gigas (Linnaeus, 1758) |
| – |
a) |
Tergum 8 in basal half and only cornus on tergum 10 light reddish brown; (tergum 8 rarely completely black) (Fig. B4.15). |
|
| b) |
Sheath with apical section less than 1.31 times as long as basal section (if between 1.31 and 1.52, use a). |
| |
|
Urocerus flavicornis (Fabricius, 1781) |
|
| 4(1). |
A) |
Antenna with at least basal 0.25–0.7 black, the remaining antennomeres white but brown to black at apex of last segment (Fig. B4.16). |
|
| B) |
Cornus completely reddish brown to light reddish brown (Fig. B4.18). |
| C) |
Tergum 8 sublaterally with microsculpture reticulate between spiracle and pitted sculpticells dorsally and sculpticells clearly scale-like (Fig. B4.20). |
| |
|
. . . . . . . . 5 |
| – |
a) |
Antenna with at most the three to four basal antennomeres black, the remaining antennomeres white, or remaining antennomeres white except for 3–7 apical antennomeres brown (Fig. B4.17). |
|
| b) |
Cornus usually black, rarely partly light reddish brown (Fig. B4.19). |
| c) |
Tergum 8 sublaterally without (at most suggested) microsculpture between spiracle and pitted sculpticells dorsally (Fig. B4.22) or reticulation outlined and sculpticells flat and scarcely elevated posteriorly (Fig. B4.21). |
| |
|
. . . . . . . . 6 |
|
| 5(4). |
A) |
Abdomen reddish brown in at least apical half (including cornus) (Fig. B4.23). |
|
| B) |
Tergum 9 with dorsal surface lateral to tergum 8 entirely smooth and without reticulation, lateral surface reticulate but sculpticells flat and scarcely elevated posteriorly (best seen in posterior view of segment) (Fig. B4.25). |
| C) |
Metatarsomere 2 in lateral view about 2 times as long as high (Fig. B4.27), and in ventral view tarsal pad about half as long as tarsomere. |
| D) |
Sheath with length of apical section less than 1.39 times basal section (if between 1.39 and 1.45, use A–C). |
| |
|
Urocerus cressoni Norton, 1864 |
| – |
a) |
Abdomen black, except cornus light reddish brown (Fig. B4.24). |
|
| b) |
Tergum 9 with dorsal surface lateral to tergum 8 smooth only medially near segment 8 and median basin, otherwise clearly reticulate laterally and sculpticells clearly scale-like (best seen in posterior view of segment) (Fig. B4.26). |
| c) |
Metatarsomere 2 in lateral view about 3 times as long as high (Fig. B4.28), and in ventral view with tarsal pad more than 0.7 times as long as tarsomere. |
| d) |
Sheath with length of apical section greater than 1.45 times basal section (if between 1.39 and 1.45, use a–c). |
| |
|
Urocerus taxodii (Ashmead, 1904) |
|
| 6(4). |
A) |
Flagellum completely yellowish to light reddish brown (Fig. B4.29). |
|
| B) |
Wings clearly yellow tinted (Fig. B4.31). |
| C) |
Metatarsomere 2 about 4.0 times as long as high (Fig. B4.33). |
| D) |
Tergum 8 sublaterally without microsculpture between spiracle and pitted sculpticells dorsally, the surface shiny (Fig. B4.35). |
| |
|
Urocerus californicus Norton, 1869 |
| – |
a) |
Flagellomere 1 or 1 and 2 black, except for brown apical flagellomeres 3-7, remaining flagellomeres white to light reddish brown (Fig. B4.30). |
|
| b) |
Wings darkly tinted (Fig. B4.32). |
| c) |
Metatarsomere 2 about 2.5 times as long as high (Fig. B4.34). |
| d) |
Tergum 8 sublaterally with microsculpture and with clearly outlined meshes between spiracle and pitted sculpticells dorsally (Fig. B4.36). |
| |
|
Urocerus albicornis (Fabricius, 1781) |
