Isoneuromyia tannia Evenhuis

Evenhuis, Neal L., 2006, New species of Isoneuromyia Brunetti (Diptera: Keroplatidae) from the Oriental Region, Zootaxa 1140, pp. 1-29 : 23-24

Isoneuromyia tannia Evenhuis , n. sp.

(Fig. 41)

Diagnosis: Closest to matilei but can be easily separated from it by the brown scutellum (the scutellum yellow in matilei ).

Description

MALE. Lengths: Body: 7.0– 8.5 mm; wing; 5.0– 5.5 mm.

Head. Vertex and occiput immediately behind ocelli black; remainder of occiput black to brown with yellow tomentum, small erect black hairs restricted to posterior eye margin. Ocelli in horizontal line. Frons dark brown on upper portion, yellow on lower portion, bare. Antennae yellowish. Face yellow above, dark brown below, silvery pruinose with small black hairs apicolaterally. Palpi and proboscis yellow.

Thorax. Mesonotum black with yellowish brown humeral areas. Scutellum dark brown. Mesonotum with dense whitish tomentum dorsally, patch of thick black hairs above wing root, on postalar calli, and posterior margin of scutellum. Prescutellar area tapering to scutellum. Pronotal lobes dark brown with dense black setae laterally. Pleura (except yellow on medial portion of laterotergite) and mediotergite dark brown, bare. Halter orange­yellow.

Legs. Coxae reddish brown, with yellow tomentum, black hairs apically; fore coxa black on basal half, hind coxa black on extreme base. Femora brown, yellow apically, all yellow tomentose. Fore tibia with yellow tibial pecten apically. Tibial spurs black. Fore basitarsus 1.5 x length of fore tibia. Mid and hind basitarsi subequal in length to lengths of respective tibiae. Claws minute.

Wing. Hyaline; vein R4 straight, ending in C slightly beyond end of R1; veins M2, CuA1, CuA2, and A1 not reaching wing margin.

Abdomen. Tergite I black, with dense recumbent black hairs; tergites II–III orange with black dorsomedially, with dense black and yellow tomentum; tergite IV–V black with black and yellow tomentum; tergites VI–VIII black with yellow tomentum. Sternum orange with yellow tomentum.

Hypopygium (Fig. 41). Gonocoxites and gonostyli brown, with stiff black and yellow hairs, apex with two dark large black teeth and single small black tooth in between them.

FEMALE. Unknown.

Etymology

The species epithet derives from the Anglo­Saxon tannian = brown, referring to the characteristic brown color of the scutellum. It is treated here as adjectival.