Bassettia, ASHMEAD, 1887

Melika, G & Abrahamson, WG, 2007, Review Of The Nearctic Gallwasp Species Of The Genus Bassettia Ashmead, 1887, With Description Of New Species (Hymenoptera: Cynipidae: Cynipini), Acta Zoologica Academiae Scientiarum Hungaricae 53 (2), pp. 131-148 : 135-136

Key to the Nearctic species of Bassettia

1 Male 2

– Female 3

2 Mesoscutum nearly as long as broad in dorsal view; scutellar foveae broad, separated by distinct median carina B. ligni

– Mesoscutum longer than broad in dorsal view, scutellar foveae very narrow, median carina indistinct ( Fig. 19 ) B. archboldi sp. n.

3 Vertex with longitudinal depression from median ocellus to antennal sockets, with more or less distinct longitudinal carina on the bottom 4

– Vertex without longitudinal depression and longitudinal carina 5

4 Mesosoma at least 2.0 times as long as high in lateral view, entire body reddish brown B. pallida

– Mesosoma nearly 1.5 times as long as high in lateral view; entire body black or dark brown to black B. ligni , asexual generation

5 Radial cell of fore wing narrow and long, 3.0–5.0 times as long as broad 6

– Radial cell of fore wing short, 2.0–2.3 times as long as broad 10

6 Metasoma as long as high in lateral view 7

– Metasoma 1.5–2.0 times as long as high in lateral view 8

7 Mesoscutum transversely dull rugose, head and body black B. gemmae

– Mesoscutum delicately transversely rugo-reticulate; head brown, mesosoma dark-brown to blackish brown B. ligni , sexual generation

8 Mesosoma reddish brown; scutellar foveae deep, rounded; dorso-axillar surface triangular (Fig. 13) B. floridana

– Mesosoma dark brown to black; scutellar foveae narrow and shallow; dorso-axillar surface narrow, elongated (Fig. 12) 9

9 Notauli complete, reaching pronotum ( Fig. 22 ); mesosoma and head brown B. pallida *

– Notauli very weak, present in posterior 1/2- 1/3 only ( Fig. 23 ), mesosoma and head black B. virginiana sp. n.

10 Malar space distinctly longer than eye height; 2nd abscissa of Rs straight B. weldi sp. n.

– Malar space as long as eye height; 2nd abscissa of Rs curved B. tenuana

Figures

Figs 17–23. 17–19 = Bassettia archboldi: 17 = fore wing, 18 = body, lateral view, 19 = scutum and scutellum, dorsal view. 20–21 = female antenna: 20 = B. virginiana, 21 = B. pallida. 22–23 = scutum