Hylaeus (Deranchylaeus) perater Cockerell, 1936

Dathe, Holger H., 2014, Studies on the systematics and taxonomy of the genus Hylaeus F. (8) Revision of the Afrotropic subgenus Hylaeus (Deranchylaeus) Bridwell (Hymenoptera: Anthophila, Colletidae), Zootaxa 3874 (1), pp. 1-84 : 61-63

Hylaeus (Deranchylaeus) perater Cockerell, 1936

Figures 31 , 120–123

Hylaeus perater Cockerell, 1936e: 4–5 . 3 ♀ 1 ♂, Belgian Congo [ DR Congo): Tshibinda. Typus ♀ AMNH New York, ac. 34187. Paratypes in NHM London: 1 ♀ from Tshibinda , 1 ♂ 1 ♀ S. Rhodesia [ Zimbabwe]: Vumba, Umtali.— Cockerell 1942: 2, 4, 13–14. Eardley & Urban 2010: 33.

Hylaeus (Deranchylaeus) perater Cockerell : Snelling 1985: 8.

Hylaeus tinctulus extensicornis Cockerell, 1936e : Amer. Mus. Novit. no. 847: 10. ♀, Belgian Congo [ DR Congo]: Burunga 29.18E 1.30S. Typus ♀ AMNH New York, ac. 34187.— Syn. n.

Hylaeus extensicornis Cockerell : Eardley & Urban 2010: 29.

Hylaeus (Deranchylaeus) extensicornis Cockerell : Snelling 1985: 8.

Diagnosis

The male of H. perater Cockerell can hardly be mistaken for the bulging, completely black face and the globular, thickened scapi. The differences between the females of this group are slight.

Characteristic features

Male. TL 5.4–5.7 (5.48) mm, WL 4.0–4.1 (4.06) mm.

Head. Proportions HL:HW 0.91, UFW:LFW 1.99, outline transversely oval, strongly arched with vertex sloping, face strongly converging downwards. Scapi black, globosely expanded, shiny, much wider than flagella, SL:SW 1.7; flagella long, black, underside slightly lighter. Face entirely black, no mask. Clypeus CL:CW 1.59, black, silky shining, midst longitudinally flat depressed. Supraclypeal area very narrow; frons coriaceous sculptured, laterally towards orbits densely punctate, punctation strong, subcontiguous. Labrum and mandibles black.

Mesosoma. Shape stretched, pronotum, calli and tegulae black. Pronotum evenly slim expanded forward, margin following curvature of mesonotum, pronotal front edge midst sharp, otherwise edged. Mesonotum and scutellum matt, punctation moderate, close. Legs black, only foretibiae in front pale; wings darkened, venation dark. Propodeum rounded, matt, little sculpted, punctation roughly; medial area flat depressed, with weak wrinkles; terminal area edged, only sharp in lower part.

Metasoma slender spindle-shaped, black. T1 shagreen, silky shining, punctation fine, sparse, following terga without apparent punctation; lateral fringes of T1 indistinct. Terminalia Fig. 31 ; S 8 with slender apical process.

Female. TL 6.30 mm, WL 4.79 mm.

Head. Proportions HL:HW 0.92, UFW:LFW 1.50, outline transversely trapezoid. Flagella short, black. Face black. Clypeus CL:CW 1.19, front edge arched, but without smooth impression, middle area flattened.

Mesosoma. Pronotum, calli and tegulae black. Pronotum as in male. Mesonotum and scutellum matt, punctation moderate, close. Legs entirely black; wings blackened, venation dark. Propodeum rounded, shaped as in male.

Metasoma slender spindle-shaped, black; terga silky shining, T1 shagreen, punctation fine, close, T2 with minute, sparse punctation, following only shagreen; with narrow white lateral fringes at T1 and T2.

Distribution

Democratic Republic of the Congo, Eritrea, Zimbabwe ( Eardley & Urban 2010); Ethiopia, Kenya.

Specimens examined: 6 ♂, 3 ♀ coll. AMNH, NHML, RBINS, SANC, SDEI

DEMOCRATIC REPUBLIC OF THE CONGO. Tshibinda; Burunga.

ETHIOPIA. Bale, Goba, 07.01N 39.59E.

KENYA. Central Province, Kikuyu.

ZIMBABWE. Chimanimani, Melsetter, 1400 m; Claremont Estate, nr Juliasdale, 18.47S 32.41E; Vumba, Umtali.

Flower visit

On flowers of Guizotia scabra , Tagetes minuta ( Ethiopia, Zewdu & Pauly, label record).

Remarks

According to the male terminalia, this species is probably closely related to H. robertianus , H. krebsianus and H. gabonicus (robertianus-group). The punctation on T1 can vary, in the material studied it is a little closer in males of Zimbabwe, and more fine in males from Kenya.

Figures

FIGURES 30–32. Male terminalia of species not assigned to a group.—30 H. krebsianus (Strand) (typus).—31 H. perater Cockerell (paratypus).—32 H. bernhardi sp. n. (typus).

FIGURES 120–123. H. (Deranchylaeus) perater Cockerell: head in frontal view and surface structure of basal terga.—120, 121 Paratypus male.—122, 123 Paratypus female. Scale 0.5 mm.

FIGURES 8–11. Male terminalia in species of curvicarinatus-group, subgroup (1).—8 H. alfkeni (Friese).—9 H. curvicarinatus (Cameron).—10 H. gessianus sp. n. (typus).—11 H. leucolippus (Friese) (typus). Scale 0.5 mm.