Hessemydas tulear, Kondratieff, B. C., Carr, Ryan J. & Irwin, Michael E., 2005

Kondratieff, B. C., Carr, Ryan J. & Irwin, Michael E., 2005, Two new genera and four new species of Mydidae (Diptera) from Madagascar, Zootaxa 978, pp. 1-14 : 3-6

Hessemydas tulear , n. sp.

( Figs. 1–5 ).

Diagnosis: Hessemydas tulear can be readily distinguished from both H. seyrigi and H. parkeri by the black­brown abdomen with distinctly defined light posterior edges of the terga 2–7, the longer proboscis and the narrow oral cavity. In the male, the form of the epandrial lobes, gonocoxites, phallus, and the parameral sheath ( Figs. 2–5 ), will easily separate this species from H. parkeri ( Fig. 6–10 ).

Description.— Male: Length of body 11.5– 12 mm, length of wing 8.0–8.5 mm.

Head: Black, frons silver­gray pollinose, pilosity of face long, white; oral cavity narrow, triangular or narrowed dorsally; occiput with long pale yellow pilosity; postocciput with white pilosity. Labium black, extending anteriorly equidistant to pedicel, apical portion covered with stiff, erect, short pale yellow setae, basal portion with long, pale yellow setae ventrally; palpi brown, subequal to length to width of labium, covered with long, white setae. Antennae black, except pedicel brown, gray pollinose, apicoflagellomere expanded apically, clavate, with apical knob containing pit with small spine ( Fig. 1 ).

Thorax: Mesonotum dull black, gray pollinose, pair of submedian gray pollinose stripes converging anteriorly, marked by white short pilosity; lateral edges of scutum and notopleuron gray­white, with long white pilosity; prepostpronotal lobe enlarged, brown; anepisternum, anepimeron, and katepisternum polished black; scutellum and mediotergum gray pollinose, scutellum with large sculptured indentures on anterolateral corners; postpronotal lobe enlarged with long white pilosity; post alar callus brown, silver pollinose posteriorly. Wings hyaline, venation brown, typical for genus. Halter brown. Legs dark brown, covered with short, brown setae, tibiae and tarsal segments with a row of stiff brown spines ventrally, with apex, pulvilli, with yellow pollinose and a row of short setae ventrally; claws with apical 1/3 black; hind legs with two ventrolateral rows of thick, brown spines; thicker, erect, and arising from tubercles on femora; coxae with short, thin, stiff brown setae.

Abdomen: Black­brown with white medium length pilosity; tergum 2 with long white pilosity, bullae brown, with black line along anterior margin; tergum 3 with long white pilosity, dorsally and laterally; terga 2–7 with posterior margins light brown, pilosity pale yellow; sterna brown.

Male genitalia: Cercus light brown, with apical light brown setae; epandrium dark brown covered with pale yellow pilosity, lobes extend medially, narrowly pointed, margins thin ( Figs. 2–4 ). Hypandrium dark brown, covered with dense pale yellow pilosity. Gonocoxite narrowly pointed, extending caudally, apical 1/3 curved medially, dorsal edge thin, basally with a thin round lobe dorsal to margin ( Figs. 2–4 ). Parameral sheath thick basally ( Fig. 5 ), with a single opening apically; ejaculatory apodeme long, narrow, ovate apically; parameres thick, sculptured; caudal process thin, long, pointed apically, extended parallel to ejaculatory apodeme enclosing nearly all of ejaculatory apodeme ( Fig. 5 ).

Female: Head black posteriorly on vertex and around ocelli. Pilosity of head short, less dense than male. Mesonotum black, margins brown. Wings hyaline; all veins surrounded by brown coloration, discal cell wholly brown; intersection of R4 and R5 with a small accessory vein. Abdomen with sparse short golden pilosity, denser posteriorly; with posterior dark colored bands posteriorly on each tergum. Acanthophorites (tergum 10) with a single row of thick, blunt translucent brown spines. Sternum 10 bulbous, divided medially; with thin brown bristles laterally. Cercus covered with short thin erect brown setae.

Material examined: Holotype male from MADAGASCAR: Tulear Prov., Ifay, 18 km N Tulear , 20 m, hand netted in spiny forest, 13 IX 2001, M. E. Irwin, F. D. Parker, & R. Harin’Hala. Paratypes. Same as holotype but Beza Mahafaly, Parcel II, Malaise in spiny forest, 200 m, 1–8 II 2002, R. Harin’Hala, M. E. Irwin, 23º41.19'S 044º35.45'E, one male; Hotel Paradisia, coastal dunes, Malaise trap, 9 m, M. E. Irwin, F. D. Parker, R. Harin’Hala, 17–24 II 2002, 23 º10.78'S 043º37.01'E, 2 males; 24 II 3 ­ III­2002, 2 male; 15–25 IV 2002, 2 males; 9 m, 3–9 III 2002, 1 male; 20 m, 3–9 III 2002, 3 males; 9–16 III 2002, 9 m, M. E. Irwin, F. D. Parker, R. Harin’Hala, 4 males; 23–28 III 2002, R. Harin’Hala, M. E. Irwin, 3 males; 25 IV–6 V 2002, 28 males; 26 VI–5 VI 2002, 2 males; 25 IV–6 V 2002, 3 males; 2?; Mikea Forest, 4 km NW Manombo, Malaise in deciduous forest, 70 m, 21–28 X 2002, 22 º54.22'S 043º28.53'E, 12 males; 28–30 X 2002, 2 males; 3–13 X 2002, 8 males; 13–21 X 2002, 6 males.

Etymology: Refers to the Tulear Province, Madagascar, where the specimens were collected.

Figures

FIGURES 1 – 5. Hessemydas tulear, sp. nov. 1. Antenna, lateral view. 2. Male terminalia, lateral view. 3. Male terminalia, caudal view. 4. Male terminalia, dorsal view. 5. Phallus, lateral view.

FIGURES 6 – 10. Hessemydas parkeri, sp. nov. 6. Antenna, lateral view. 7. Male terminalia, lateral view. 8. Male terminalia, caudal view. 9. Male terminalia, dorsal view. 10. Phallus, lateral view.