Stenogephyra minuta, Lyneborg, 1987

Lyneborg, Leif, 1987, Notes on the Phycini of southern Africa with the description of a new genus and two new species (Diptera: Therevidae: Phycinae), ANNALS OF THE NATAL MUSEUM 28 (2), pp. 467-474 : 474

Stenogephyra minuta sp. n.

Fig. 22

Etymology: Refers to the very small size of this species; in fact one of the smallest therevids so far recorded.

Description, ♂.

Differs from ♂ of torrida , described above, as follows: overall smaller, total length 3,0- 3,3 mm. Eyes lower, nearly circular in lateral view. Upper occiput polished black, white-grey tomentum consequently only present on lower section of postocular margin. Pile of head longer. Antenna ( Fig. 22 ) with first flagellomere characteristically downcurved apically. Thorax coloured as in torrida , but pile longer, and with fewer setae, viz., np = 2, sa = 1, pa = 1, dc = 0 (but long hairs in the position), and sc = 1. Vein M2 usually reaches wing-margin, but in one specimen it is slightly abbreviated in one wing only. Wings more hyaline, and halter entirely brown-black. Femora blackish, with rather thick white-grey tomentum and white pile. Tibiae and tarsi brown-black to black. Abdomen as in torrida , but pile longer. Male genitalia agreeing in all details with those of torrida , but ventral epandrial sclerite (cf. Fig. 12 ) is only one-third as wide as epandrium, and distiphallus (cf. Fig. 16 ) is slightly more slender.

♀.

As ♂, but frons wider, and first flagellomere shorter and narrower, but curved as in ♂. Legs coloured as in male, and thus very different from female of torrida , which has largely yellowish legs. Total length: 3,5-4,0 mm.

Material examined: Cape Province: ♂ (holotype), Karoo at junction of Calvinia­Sutherland Rd. nr. Inverdoorn Ceres , 33°12 'S, 19°44 'E, 2-3. x. 1959, B. & P. Stuckenberg ( NM) ; 4 ♂ 1 ♀ (paratypes), same data as holotype ( NM ZMC) ; 1 縠 (paratype), Uniondale district , x.1952, Mus. Exp. ( SAM) .

Figures

Figs 6-22. Stenogephyra gen. n. 6-21. S. torrida sp. n. 6. 7. Male head in frontal view. B. Male antenna. 9. Female antenna. 1O-1B. Male terminaha. 10. Male genitalia in lateral view. 11. Epandrium and cerci in dorsal view. 12. Epandrium, cerci and ventral epandrial sclerite in ventral view. 13. Gonocoxites with gonostyli in ventral view. 14. Left gonocoxite with ~onostylus and aedeagal complex in dorsal view. 15. Right gonocoxite with gonostylus in mterior view. 16. Aedeagus in lateral view. 17. Sternite B. lB. Tergite B. 19-21. Female terminalia. 19. Sternite B. 20. Subgenital plate and vaginal apodeme. 21. Tergite B, tergite 10 and cerci in dorsal view. 22. S. minuta sp. n., male antenna. Scale: 1 mm for 6 and 7,0,5 mm for the rest.