Hylaeus (Deranchylaeus) venustus, Dathe, 2014

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 : 73-74

Hylaeus (Deranchylaeus) venustus sp. n.

Figures 14 , 144–145

Diagnosis

This is a small dainty species in the curvicarinatus-group. Its striking feature is the rich, bright yellow coloration on the head and legs that is unique to the subgenus. The female is unknown.

Description

Male. TL 3.7–4.1 (3.90) mm, WL 2.4–2.8 (2.63) mm.

Head. Proportions HL:HW 1.05, UFW:LFW 1.61; outline long trapezoid. Scapi yellow, short conical, as wide as flagella, SL:SW 1.34; flagella long, thicker distally, completely yellow. Mask yellow, complete, supraclypeal area dyed completely yellow to upper tip. Foveae faciales short. Clypeus CL:CW 1.40, shagreen, matt, shallow and scattered indistinct punctate, front edge narrow horn-brown. Supraclypeal area relatively wide. Frons and vertex with moderate, dense punctation, shiny, pilosity apparent, erect, at bottom and rear edges of head. Genae and occiput normal, malae expanded. Labrum and mandibles yellow.

Mesosoma of normal shape. Pilosity short, white, mostly appressed toment band at posterior margin of pronotum, mesonotum and scutellum, spreading tufts at sides of metanotum and propodeum. Calli, tegulae and wing scales yellow. Pronotum mostly black, sometimes in front of angles with a yellow spot; narrowly expanded forward, anterior margin and dorsolateral angles rounded. Mesonotum roughly shagreen, silky shining, punctation moderate, close; on scutellum somewhat coarser and more scattered (punctation strong, sparse). Mesopleurae like mesonotum dominated by shagreen. Legs yellow, coxae and base of femora light brown; wings hyaline, venation light brown. Propodeum edged, glossy; medial area at base with large shiny meshes, delimited by carina; terminal area sharply edged around.

Metasoma. Outline narrow, slender spindle-shaped; black, partially lightened brown. T1 shagreen, silky shining, punctation fine, close to dense, following terga finer punctate, punctures increasingly disappearing in sculpture. T1 with white lateral fringes, T2 with white, broadly interrupted terminal band on depression. Terminalia ( Fig. 14 ) as in curvicarinatus-group; genital capsule short, compact, gonoforcipes apically rounded truncate; S8 appendages moderately long, S7 proximal lobi with two comb teeth.

Distribution

Kenya.

Type material: 6 ♂

Holotypus: ♂ KENYA. Voi env. (Tsavo), 23.03.– 04.04.1997, Halada lg.—In coll. Biozentrum Linz.

Paratypes: 5 ♂, same collecting data.—In coll. Biozentrum Linz, SANC Pretoria, SDEI Müncheberg.

Derivatio nominis

The Latin adjective venustus means petite, pretty or neat.

Figures

FIGURES 12–15. Male terminalia in species of curvicarinatus-group, subgroup (2).—12 H. promontorii Meade-Waldo.—13 H. tenuis (Alfken) (lectotypus).—14 H. venustus sp. n. (typus).—15 H. xanthostoma (Alfken).

FIGURES 144–145. H. (Deranchylaeus) venustus sp. n., male (typus): 144 head in frontal view, 145 surface structure of basal terga. Scale 0.5 mm.