Lithosaphonecrus

Key to Lithosaphonecrus species

Currently 12 species of Lithosaphonecrus are known, with the herein new described species (Table 1). An identification key to all Lithosaphonecrus is presented below.

1 Frons medially without carinae, although facial striae extend on the lateral area of the frons, reaching the lateral ocelli; POL 3.0x as long as OOL; occipital carina well defined, complete (Fig. 24).................................. L. papuanus

- Frons with few carinae running from toruli to lateral ocelli or with median frontal carina; POL less than 3.0x as long as OOL; occipital carina absent or incomplete (Fig. 25), present only above mid part of occipital foramen...................... 2

2 Posterolateral margin of gena delicately curved (Figs 27–28)................................................... 3

- Posterolateral margin of gena strongly angled (Fig. 29)....................................................... 8

3 Mesoscutum anteriorly vertically abrupt to pronotum (Fig. 31)................................................. 4

- Mesoscutum anteriorly not abrupt vertically, delicately curved till pronotum....................................... 6

4 Gena behind eye much narrower dorsally than ventrally (Fig. 27); parascutal carina extending to tegula level only; syntergite 2+3 with posterior reticulate band, all subsequent terga microreticulate.................................... L. huisuni

- Gena behind eye only slightly narrower dorsally than ventrally (Figs 28–29); parascutal carina extending to notaulus (Fig. 30); syntergite 2+3 with a posterior band of micropunctures, subsequent terga with micropunctures........................ 5

5 Legs yellow, except darker hind coxa; mesoscutum imbricate with weak transverse rugae, median mesoscutal line absent. Males unknown. From bud galls on Lithocarpus thomsonii........................................... L. mindatus

- Legs brownish, most part of coxae and femora blackish; mesoscutum transversely rugose-carinate, median mesoscutal line in a form of short triangle. F 1 in male incised on outer margin, weakly swollen distally, slightly longer than F2+F3, F2=F3; frons in male densely setose. From bud galls on Castanopsis sp......................................... L. vietnamensis

6 Mesosoma black. Torulus in females below mid-height of eye; F 1 in female slightly longer than pedicel (Fig. 34); POL 2.5x as long as OOL; radial cell 3.0x as long as wide, R1 not reaching wing margin, Rs curved (Fig. 35). F 1 in male around 1.5x as long as pedicel (Fig. 36)..................................................................... L. arcoverticus

- Mesosoma dark brown. Torulus in females at mid-height of eye; F 1 in females longer, at least 1.3x as long as pedicel; POL 1.6x as long as OOL; radial cell shorter, R1 reaching wing margin, Rs nearly straight. F 1 in male longer.................... 7

7 Head trapezoid (Fig. 32). F2+F 3 in females subequal to F1 (Fig. 38). F 1 in males 2.0x as long as pedicel, last flagellomeres 2.0x as long as broad (Fig. 40)..................................................................... L. decarinatus

- Head rounded in frontal view (Fig. 33). F2+F 3 in female 1.3x as long as F1 (Fig. 37). F 1 in males less than 2.0x as long as pedicel, last flagellomeres shorter (Fig. 39)....................................................... L. formosanus

8 Parascutal carina extending to tegula only.................................................................. 9

- Parascutal carina extending to notaulus (Fig. 30)........................................................... 10

9 Males only. Head and mesosoma black; gena with subparallel striae radiating from malar space and extending behind eye; occiput and postgena smooth, glabrous. F1 2.6x as long as F2 and 1.9x as long as pedicel....................... L. yunnani

- Males and females. Head and/or mesosoma partially brown; gena behind eye alutaceous, subparallel striae radiating from malar space extending only into lower part of gena; occiput and postgena alutaceous to reticulate. F 1 in male 1.9x as long as F2 and 1.5x as long as pedicel; F 1 in female 1.9x as long as F2, F2 slightly longer than F3.......................... L. dakengi

10 POL 1.3x as long as OOL or slightly shorter; postgena setose; transfacial distance 1.2x as long as height of eye; gena along occipital carina coriaceous, without foveae; lower face in male with dense white setae, hidden striae (Fig. 26)..... L. edurus

- POL 1.5x as long as OOL; postgena glabrous; transfacial distance equal or shorter than height of eye; gena along occipital carina strongly, transversally carinate, foveolate; lower face in male with sparse setae, irradiating striae distinct, visible... 11

11 Head and mesosoma black; frons with median longitudinal striae running from toruli to central ocellus; clypeus ventrally triangular; radial cell around 3.0x as long as broad; lateral propodeal carinae converging ventrally. F 11 in females less than 2.0x as long as F10; F 1 in males around 2.0x as long as pedicel...................................... L. nagalandi, sp. nov.

- Head and mesosoma reddish to chestnut; frons without median frontal carinae; clypeus ventrally straight; radial cell shorter; lateral propodeal carinae subparallel. F 11 in females more than 2.0x as long as F10; F 1 in males more than 2.0x as long as pedicel.................................................................................. L. puigdemonti