Trichocolletes marginatus (Smith)

Batley, Michael, 2012, Revision of the Australian Bee Genus Trichocolletes Cockerell (Hymenoptera: Colletidae: Paracolletini), Records of the Australian Museum (Rec. Aust. Mus.) 64 (1), pp. 1-50 : 27-28

Trichocolletes marginatus (Smith)

Figs 19 , 36, 66, 104

Paracolletes marginatus Smith, 1879, p. 4 .

Trichocolletes (Trichocolletes) marginatus Michener, 1965 ,

p. 80.

Specimens examined. The lectotype ♂, Australia , BMNH (Hym 17.a.417) and the following. Western Australia: ♂, Albany , 9 Nov. 1981, B. L. Dickenson, WAM (13904) ; ♀, Albany, L. J. Newman, WAA (80829) ; 2♀, Albany , 18 Nov. 1991, H. T . Mattner , WAM (13900–01) ; 8♂, Calgardup , WAM (13747–54) ; ♀, Cape Freycinet , 15–18 Nov. 1986, T . F. Houston , WAM (13903) ; 2♂, Denmark , WAA (45282–83) ; 12♂, Elleker near Albany (35.0167°S 115.9500°E), 1 Nov. 1998, A. Ferguson, WAM (21954–65) ; ♀, Margaret River , 29 Dec. 1970, G. A. Holloway, AM (K.316700) ; ♂, 25 km NE Nannup (33.8167°S 115.9500°E), 25 Nov. 1989, P. Jones, WAM (18565–67) ; 5♂, Pemberton , 24 Nov. 1958, W. Napier, WAA (45292–96) ; ♀, West Midland , 12 Nov.1950, MV (16514) ; 2♀, West Midland (31.8833°S 115.9833°E), 26 Oct.1952, MV (16526,30) ; ♀, 14 km WSW Witchcliffe , 14 Nov.1986, T . F. Houston, on flowers of Jacksonia, WAM (13902); 2♂, 2♀, Yallingup, WAM (13755–58) ; ♂, Yallingup , 16 Nov. 1968, N. McFarland, SAM (32-024666).

Diagnosis

Length 15–16 mm; eyes not hairy; metasomal bands narrow, gold or silver; upper margin of mandible with horizontal projection, more pronounced in male. Male mid and hind tibiae incrassate; flagellum longer than head width; S2 with large, untidy hair tuft.

Descriptions

Male (WAM 21957).— Head width 4.70 mm, body length 16.0 mm. Relative dimensions: HW 50, HL 37, UID 28, UFW 29, LID 32, DMA 30, HVO 6, WOC 13, MOD 4, OOD 8, IAD 8, ASD 4, AOD 8, ML 19, BMW 9, MSL 1, SL 13, SW 3, FL c. 56.— Eyes not hairy; head broad; inner orbits divergent ventrally; malar space very short; clypeus strongly protuberant; basal 2 ⁄ 3 mandible with horizontal projection from upper margin ( Fig. 19 ); flagellum longer than head width, middle flagellomeres c. 1.6× as long as wide. Legs stout; mid tibia strongly swollen; hind tibia less so, concave on inner surface; length hind tarsus subequal to length hind tibia; hind basitarsus 3.7× as long as wide; basitibial area acarinate. Genital capsule (Fig. 36) somewhat like that for T. orientalis n.sp., but with larger projection on inner surface of gonoforceps; S7 with rectangular lateral lobes, very long posterior projections and small basal teeth ( Fig. 66 ).— Labrum cream; ventral margin of clypeus yellow-brown; mandible medially amber; scape, tibiae, tarsi, anterior face fore femur, distal ends of mid and hind femora and flagellomeres F1–4 ventrally, orange-brown; remainder of flagellum dark brown. T1–5 with gold or silver bands, narrowly stained brown across anterior margin; wings darkened.— Face covered with long, plumose, orange hair, close and stiffly erect on the clypeus, dense elsewhere. Scutum closely covered with long, erect, finely-branched orange hair; fore basitarsus with tapered plume of long, orange hair; fore trochanter and femur with thin cover of long orange hair; anterior margin hind basitarsus and distal half hind tibia with sparse, long, orange hair.

Female (AM K.316700).— Head width 4.90 mm, body length 15.3 mm. Relative dimensions: HW 50, HL 36, UID 26, UFW 31, LID 32, DMA 30, HVO 5, WOC 11, MOD 3, OOD 7, IAD 8, ASD 3, AOD 9, ML 19, BMW 8, MSL 0.5, SL 15, SW 3, FL c. 34.— Eyes not hairy; head broad; inner orbits divergent ventrally; malar space very short; mandibular projection less prominent than for male; clypeus transversely convex; inner hind tibial spur with c. 9 long teeth, outer spur pectinate; tarsal claws simple.— Ventral margin of clypeus medially, distitarsi orange-brown; legs dark brown. T1–4 with narrow gold or silver bands.— Clypeus weakly reticulate with large punctures, dense basally, open apically; supraclypeal area with punctures coalescing into irregular vertical channels; scutum and metasoma with dull sheen.— Face with long, white, plumose hair, dense in paraocular areas and on frons, open on supraclypeal area and dorsolateral margins of clypeus. Scutum densely covered with short, finely-branched, dark-tipped pale brown hair; hind tibial scopa dark brown with paler hair on anterior margin; prepygidial fimbria dark brown to black.

Remarks. In his original description, Smith reported that his specimens came from Queensland, leading Cockerell (1913a, 1914) to apply the name T. marginatus to the species here named T. serotinus n.sp.. As pointed out by Michener (1965), this has led to the misidentification of many specimens of T. serotinus n.sp. in Australian collections.

This species is referred to as F259/M 231 in Houston (2000).

Distribution. Coastal southwestern Australia (JF, SWA, WAR) ( Fig. 104 ).

Figures

Fig. 19. Trichocolletes marginatus left mandible of male with horizontal projection arrowed.

Figs 56–67. Seventh sternum of Trichocolletes males.

Figs 104–115. Known distribution of Trichocolletes species.