Hylaeus (Deranchylaeus) dregei ( Strand, 1912 )

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 : 36-37

Hylaeus (Deranchylaeus) dregei ( Strand, 1912)

Figures 23 , 70–73

Prosopis dregei Strand, 1912: 27 . 1 ♂, South Africa: Kapland. Typus ♂ MNHU Berlin.— Strand 1927: 113.

Hylaeus dregei (Strand) : Cockerell 1942: 2, 8. Eardley & Urban 2010: 29.

Hylaeus (Deranchylaeus) dregei (Strand) : Bridwell 1919: 137–138, 142; Snelling 1985: 8, 26.

Hylaeus (Deranchylaeus) microstictus Cockerell 1942: 2 , 4, 8–9, 14. 3 ♀, South Africa: Cape Province, Mossel Bay . Typus ♀ NHM London, no. 17.a.1406.— Syn. n.

Hylaeus microstictus Cockerell : Eardley & Urban 2010: 32.

Diagnosis

Both sexes have widely rounded faces, due to the expanded sides of their faces and thickened genae, and prolonged vertex in male. The female has a smooth clypeal impression. The propodeum is rounded and punctate in both sexes. The male metasoma has a pair of small tubercles on the S3 which is a unique character in this subgenus.

Characteristic features

Male. TL 5.4–6.5 (5.91) mm, WL 3.6–4.6 (4.12) mm.

Head. Proportions HL:HW 0.94, UFW:LFW 1.43; outline transversely trapezoid. Scapi black, spindle-shaped expanded, SL:SW 2.4, densely punctate, matt; flagella yellow, dark on upper side. Mask ivory white, complete, apical half of supraclypeal area black; foveae faciales short but distinct. Clypeus CL:CW 1.60, anterior edge black. Supraclypeal area only half as wide as its distance from respective eye margin. Vertex elevated. Labrum and mandibles black.

Mesosoma compact. Pilosity sparse, short, white; integument with two short white stripes on pronotum, a spot on each tegula. Pronotum narrowly expanded forward, anterior edge rounded, dorsolateral angles obtuse. Mesonotum and scutellum shagreen, slightly shining, punctation strong, close to dense. Legs black, with bright patches at tibial bases and stripes on foretibiae in front; wings darkened, venation brown. Propodeum rounded, coarsely sculptured with dense strong punctation, without carinae, medial area with small net wrinkles, medial furrow of terminal area deep.

Metasoma compact, black. T1 with strong close to dense punctation, T2 finer punctate, following terga only shagreen, S3 with two small transverse tubercles; T1 with white lateral fringes. Terminalia ( Fig. 23 ): genital capsule with short oval outline, nearly circular; S8 prolonged in both sides, S7 with numerous partially flattened bristles.

Female. TL 6.0–7.6 (6.81) mm, WL 4.0–5.2 (4.64) mm.

Head. Proportions HL:HW 0.89, UFW:LFW 1.42, outline nearly circular. Face with two moderately broad white stripes on orbits between fovea and clypeal pit; foveae faciales long, expanded to vertex. Clypeus impression large, expanded from clypeus front edge upward without distinct upper limitation, divided medially by a shallow tubercle, CL:CW 1.24.

Mesosoma. Pronotum with broad white stripe, tegulae each with a bright spot. Pronotum expanded forward, dorsolateral angles blunt. Mesonotum, scutellum and mesopleurae punctation moderate close to subcontiguous, partly strong, punctures irregularly distributed. Legs black, only foretibiae II with white spots; wings darkened, venation brown. Propodeum rounded, similar to male.

Metasoma compact spindle-shaped, black. T1 with strong dense punctation, apically with smooth stripe, T2 with moderately to strong close to dense punctation, end half with finer or nearly without punctures, following terga only shagreen; T1 with white side fringes.

Distribution

South Africa.

Specimens examined: 15 ♂, 52 ♀ coll. AMG, MNHU, NHML, OLBL, SAMC, SANC.

SOUTH AFRICA. Eastern Cape: Alexandria Nature Reserve 10 km SE; Algoa Bay; Bathurst; Cold Springs SW of Grahamstown, 33.20S 26.29E; Grahamstown, Hilton; Grahamstown, Howlson's Poort; Jeffreys Bay; Kasouga; Kenton-on-Sea; Sterangs Bay, Humansdorp; Strowan, Grahamstown.— Western Cape: Brandfontein Reserve, 34.46S 09.52E; Klaarstroom, Prince Albert; Knysna Oyster; Knysna, 34.01S 23.02E; Mossel Bay; Plettenberg Bay 40 km E, 34.01S 23.53E, 180 m. — KwaZulu-Natal: Durban.

Remark

In the collection and database of AMG this species is referred to as " Hylaeus (Deranchylaeus) sp. D" ( Gess & Gess 2014).

Figures

FIGURES 23–25. Male terminalia in species of dregei-group.—23 H. dregei (Strand) (typus).—24 H. haygoodi Bridwell.—25 H. lightfooti Bridwell.

FIGURES 70–73. H. (Deranchylaeus) dregei (Strand): head in frontal view and surface structure of basal terga.—70, 71 Male.—72, 73 Female. Scale 0.5 mm.