Lichtwardtia infuscata Tang & Grootaert

Tang, Chufei, Yang, Ding & Grootaert, Patrick, 2018, Revision of the genus Lichtwardtia Enderlein in Southeast Asia, a tale of highly diverse male terminalia (Diptera, Dolichopodidae), ZooKeys 798, pp. 63-107 : 63

Lichtwardtia infuscata Tang & Grootaert sp. n. Figs 22, 23, 24

Material examined.

Holotype male (coll. RBINS): CAMBODIA: Siem Reap prov., Angkhor, Preah Kahn Temple, 24 January– 21 February 2006, Malaise trap in secondary forest (leg. Yothin Oul). Paratypes: 2 males, same provenance as holotype, 28 March– 5 April 2005.

Diagnosis.

Wing anteriorly brown, grey below Cu and M1. Costa lacking a swelling. Postpedicel about as long as wide with rounded tip, apex brownish yellow, ventrally yellowish. Mid coxa anteriorly with a black stripe, posteriorly brown. Hind coxa entirely yellow. Phallus with strong black spines, phallus and hypandrium resting on a ventral protuberance of the epandrium. Cercus seamed with long, fine black and pale bristles.

Description.

Male. Body length 4.1 mm, wing 3.2 × 1.1 mm. Head dark metallic green, with thick pale pollinosity; face slightly raised, frons and face both with thick pale pollinosity, gradually narrowed downward. Hairs and bristles on head black but lower postocular bristles yellowish. Antenna yellow except but apical half of postpedicel brown; postpedicel nearly triangular, 1.2 times as long as wide; arista-like stylus black, almost as long as head width, feather-like, with long regular pubescence. Proboscis dark yellow, with black hairs; palpus very small, dark yellow, with one short black apical bristle.

Thorax dark green, with pale grey pollinosity. Hairs and bristles on thorax black; five strong dc, ten pairs of strong acr. Scutellum with two pairs sc, apical pair long strong, basal pair short and weak. Legs mainly yellow. Mid coxa anteriorly with a black stripe, posteriorly brown. Hind coxa entirely yellow. Fore tarsomere I brown, apical fifth of each hind tarsomere brownish. Fore and mid coxae anteriorly with rows of bristle-like hairs, and four strong ap, hind coxa with two outer bristles, basal one strong, apical one relatively weak. Mid and hind trochanters both with four short weak ap. Fore femur with one weak preapical av. Mid femur with one strong pd and one preapical av. Hind femur with one strong pd at apical quarter. Fore tibia with two ad, three pd, one av and three ap. Mid tibia with two ad, four pd and four ap; all long strong. Hind tibia with four ad, four pd (of which one preapical), one d, two pv and three ap. Fore tarsomere I with one short av at base. Hind tarsomere I with one strong ad at apical third, one short ad at base and two short apical bristle. Relative lengths of tibia and five tarsomeres of legs LI: 7.5: 4.5: 1.8: 1.3: 1.0: 1.0; LII: 11.2: 6.3: 3.0: 2.5: 1.5: 1.3; LIII: 12.5: 5.0: 5.2: 3.8: 2.5: 1.5. Wing anteriorly brownish infuscate (Figure 22A) including the cross veins; veins brown. M with fading M2, M1 with one short subvein. Crossvein dm-cu straight. CuAx ratio 1.0. Lower calypter pale with black hairs. Haltere pale.

Abdomen metallic green, with pale pollinosity. Hairs and bristles on abdomen black.

Male terminalia: Epandrium 2.0 times longer than wide; epandrial lobe with three long pale bristles. Ventral surstylus with five ap, of which ventral most apical bristle rod-like and others spinous; dorsal surstylus both with five short nail-like ap and one long digitation close to dorsal margin which with one long spinous bristle. Phallus with strong black spines, phallus, and hypandrium resting on a ventral protuberance of the epandrium. Cercus nearly triangular, pale except the thick black ring, with weak digitations around outer margin, with long pale marginal bristles on digitations. Hypandrium simple. Phallus strong with strong black denticles (Figure 24A).

Female. Unknown.

Etymology.

From Latin infuscāre to darken.

Comments.

It is not clear if L. infuscata sp. n. belongs to the L. dentalis -group though it has the tip of the phallus ventrally denticulate and a simple hypandrium. The cercus is more elongate and lacks a dorsal bristle at the inside. Others see comments under L. ziczac .

Distribution.

Cambodia.