Genus Eurytermes · 宽白蚁属

Morphology

The descriptions below are an adaptation of the original genus-level accounts; terms follow the meaning of the source, and the original is not transcribed verbatim.

Diagnostic characters

Alate: head nearly circular, narrowing in a straight line anteriorly, frons rather strongly arched, compound eyes small and strongly projecting, fontanelle distinct and far back (hence the median transverse band rather long); antennae 15-segmented (or 14), segment 3 distinctly shorter than segment 2. Soldier: head thick, rectangular, eyeless, cranial sutures invisible, fontanelle almost indistinct; labrum triangular, mandibles rather short and stout, left mandible with 1 large, strong, anteriorly directed tooth before the midpoint; antennae very fine, 14-segmented. Worker: head oval, length barely exceeding width.

Alate

Head nearly circular, narrowing in a straight line anteriorly; frons rather strongly arched; compound eyes small, strongly projecting; ocelli small, about their own diameter from the compound eye, inner margin slightly raised. Fontanelle distinct, far back, hence the median transverse band rather long. Postclypeal basis rather arched, length equal to half its width or slightly less, posterior margin rather strongly arcuate. Labrum at the middle barely wider than at the base, without a chitinous transverse band. Mandibles with the Termes-type armature, base not very developed. Antennae 15-segmented, segment 3 much shorter than segment 2 and slightly shorter than segment 4 (or 14-segmented, in which case segment 3 as long as segment 2). Pronotum narrower and smaller than the head, anterior margin straight, only slightly upfolded; meso- and metanotum with only a very narrow triangular emargination; posterior angles pointed, not rounded. Forewing scale only slightly longer than the hindwing scale; wings covered with fine hairs; in the forewing the media arises directly from the wing scale (exceptionally from the radial sector), in the hindwing the media arises from the radial sector; media closer to the radial sector than to the cubitus. Cerci short, without styli. Female densely covered with glandular setae, male also but more sparsely. Fore tibia with 3 apical spurs. Body rather slender.

Soldier

Head thick, rectangular; eyeless; cranial sutures invisible; fontanelle almost indistinct; postclypeus short. Labrum triangular, rather short, without a hyaline apical point. Mandibles rather short and stout; left mandible with 1 large, strong, anteriorly directed tooth before the midpoint, with a trace of a tooth on its basal side; right mandible with 1 slightly obtuse tooth. Antennae very fine, 14-segmented, segment 2 only slightly longer than segment 5. Pronotum barely reaching half the head width, with a large anterior lobe. Cerci short, without styli.

Worker

Head oval, length barely exceeding width, convex; frons concave above it.

Sources: Holmgren N. 1912. Termitenstudien. 3. Systematik der Termiten. Die Familie Metatermitidae. Kungliga Svenska Vetenskapsakademiens Handlingar 48(4): 1–166., pp. 82–83（Gattung Eurytermes；Imago、Soldat、Arbeiter） This text is an adaptation, not a verbatim transcription of the original.