Xenapates gaullei (Konow, 1896)

Liston, Andrew D., Goergen, Georg & Koch, Frank, 2015, The immature stages and biology of two Xenapates species in West Africa (Hymenoptera, Tenthredinidae), Deutsche Entomologische Zeitschrift 62 (1), pp. 9-17 : 10-11

Xenapates gaullei (Konow, 1896) Figs 6-7, 10, 12

Description.

Colour (Fig. 10). Head yellow, with large medial black fleck on posterior vertex. Fleck about as long as wide and not reaching to vertical furrows or frons. Large black patch, at least 5 × as long as ocularium, surrounds stemmatum and extends above level of dorsal apex of frons. Trunk dorsally grey to supraspiracular line, paler below this except for grey ventral edges of subspiracular and surpedal lobes. Coxae basally ringed with black. Anal area including anal prolegs pale orange. Note: dark coxal markings only become conspicuous in last feeding instars.

Head (Fig. 12). No depression present on each side of coronal suture dorsal of junction with frontal suture. Setae on vertex and parietals slightly darkened and as long as diameter of antennomere 1. Setae on lower frons and genae longer (as long as antenna) and paler. Right lobe of labrum only slightly larger than left.

Trunk. Prothorax with dorsal annulets clearly separated. Annulet 3 medially divided and lateral lobes slightly higher than lateral parts of 1 and 2. Entire surface of integument on dorsum above spiracles, and partly on subspiracular and surpedal lobes, densely and uniformly spiculate (Fig. 7); each spicule apically darkened.

Length of fully grown larvae: 20-21 mm (n = 7).