20 
Records of the Australian Museum (2012) Vol. 64 
Hope (32.9936°S 145.9006°E), 19 Sep. 2005, 3 Sep. 2007 & 1 Sep. 2009, 
M. Batley, ex Eutaxia microphylla, AM (K.344678-91, K.344698-705, 
K.344709-11); & Mount Wilson (33.5417°S 150.3414°E), 24 Sep. 2002, 
M. Batley, exDaviesia ulicifolia, AM (K.344674); Pilliga NR (30.7442°S 
149.5131°E), 18 Sep. 2000, M. Batley, ex Pultenaea microphylla, AM 
(K.344673); 2(3, Turramurra (33.6864°S 151.1600°E), 28-29 Aug. 2005, 
M. Batley, exDillwynia retorta, AM (K.344675-76). 
Diagnosis 
Length 10-11 mm; eyes hairy; metasomal bands moderately 
narrow, gold. Male fore basitarsus with plume; S7 with 
subtriangular lateral lobes (Figs 57-58). Female basal margin 
of the clypeus V-shaped; inner hind tibial spur with c. 7 teeth; 
pygidial plate with weak medial elevation. 
Variation 
S7 of males varies in shape with the degree of emargination 
between the anterior edge of the lateral lobe and the basal 
tooth ranging from no emargination to strong emargination 
(Figs 57-58). A population from one collection site, yielded 
specimens covering half the total range of variation. No 
correlation between the shape of S7 and geographic location 
was found. 
Descriptions 
Male (holotype).— Head width 3.90 mm, body length 10.8 
mm. Relative dimensions: HW 50, HL 37, UID 30, UFW 32, 
LID 31, DMA 30, HVO 4, WOC 14, MOD 3, OOD 9, IAD 9, 
ASD 4, AOD 9, ML 19, BMW 7, MSL 2.5, SL 13, SW 3, FL 
c. 50.— Eyes hairy; face wider than long, inner orbits parallel; 
malar space c. 0.35x basal mandibular width; length flagellum 
equal to head width, middle flagellomeres c. 1.4xas long as 
wide. Legs slender; length fore basitarsus 0.25x head width; 
hind tarsus as long as hind tibia; hind basitarsus 4.3x as long 
as wide; basitibial area with weak posterior carina almost 
reaching apex. Genital capsule similar to that for T. orientalis 
n.sp. (Fig. 37); S7 with short posterior processes, triangular 
lateral lobes either fused with basal teeth or separated from 
them by a small emargination (Figs 57-58).— Labrum , 
mandible medially, scape, hind tibia, anterior faces fore and 
mid tibiae orange-brown. Tl-5 with narrow, gold bands; T7 
dull orange-brown. —Clypeus densely punctate except apical 
20% impunctate and polished; scutum dull with strong pit- 
reticulation and barely visible, open punctation. —Face with 
dense, long, finely-branched, bright orange hair. Scutum with 
open, plumose bright orange hair; fore basitarsus with tapered 
orange plume; trochanters with abundant long, pale hair. 
Female (AM K.334688).— Head width 4.00 mm, body 
length 10.4 mm. Relative dimensions: HW 50, HL 37, UID 
30, UFW 32, LID 31, DMA 31, HVO 3, WOC 14, MOD 3, 
OOD 8, IAD 8, ASD 4, AOD 9, ML 22, BMW 7, MSL 1.5, 
SL 15, SW 3, FL c. 33.— Eyes hairy; face broad; inner orbits 
parallel; malar space moderately short (length c. 0.15x basal 
mandibular width); clypeus gently convex, at most slightly 
flattened basally, basal suture shallow V-shaped; flagellum 
moderately short, middle flagellomeres c. 1.3x as long as 
wide; inner hind tibial spur with c. 7 teeth; tarsal claws simple; 
pygidial plate emarginate, with weak but strongly sculptured 
medial elevation. —Labrum , mandible medially, tarsi, hind 
tibia, front surface of fore and mid tibiae, distal ends of femora 
orange brown; remainder of legs dark brown. Tl-4 with 
moderately narrow gold bands.— Clypeus closely to densely 
punctate, dulled basally with pit-reticulation; supraclypeal 
area with dense punctures coalescing to form irregular 
longitudinal grooves; scutum with dull sheen, moderately 
strong reticulation with small, close punctures.— Face with 
long, plumose, pale orange hair becoming darker near ocelli, 
dense in paraocular areas and on frons, open on clypeus and 
supraclypeal area. Scutum with close, moderately short, 
plumose, orange hair; prepygidial fimbria honey-brown. 
Remarks. Similar to T. aeratus n.sp., but darker, with 
narrower, bronze metasomal bands and sparser scutal hair. 
Males may be distinguished from T aeratus n.sp. by presence 
of fore basitarsal plume and the shape of S7, while females 
differ in the V-shaped basal margin of clypeus (smoothly 
concave in T. aeratus n.sp.) and the smaller number of teeth 
on the inner hind tibial spur. 
Etymology. The specific epithet is a Latin adjective meaning 
dusky. 
Distribution. Central New South Wales from coast to 
western plains (BBS, MDD, NSS, SB) (Fig. 95). 
Trichocolletes gelasinus n.sp. 
Figs 14-15, 33, 59, 96 
Type. Holotype Neerabup National Park, 38 km NNW 
Perth, Western Australia (31.74°S 115.77°E), 13 Aug. 2000, 
T. F. Houston, on flowers of Hardenbergia comptoniana, in 
WAM 27809. 
Specimens examined. The holotype and the following. Western Australia: 
4(3, same data as holotype; % Barracca Nature Reserve, 8 km NE Muchea, 
23 Jul. 1999, T. F. Houston, on flowers of Daviesiaphysocles, WAM (27180); 
% Beechboro, 3 Sep. 1969, R. J. Lawrence, WAA (80848); $, $, Beekeepers 
Reserve Eneabba-Leeman-Jurien area, 18-19 Jul. 1987, M. Lyons, WAM 
(13638-39); 3d 1 , Boranup, 11 Sep. 1965, G. H. Riley, WAM (13812-14); 
S, Busselton, 4 Sep. 1943, O. Dawson, ANIC; 19(3, 8$, Cottesloe, WAM 
(13715-16,19-20,22^46); $, Drummond Cove, 6 Mar. 1973, N. McFarland, 
WAA (45288); 4(3,3$, 13mi.NGeraldton, 190ct. 1971,T.F. Houston, SAM 
(32-024634^10); 3$, 13 km S Grass Patch, 17 Oct. 1974,1. D. Naumann 
& J. C. Cardale, ANIC; 2$, 25 km 15°W of N Eneabba, 28 Aug. 1999, 
T. F. Houston, WAM (27518-19); $, 31 km 9° W of N Eneabba, 28 Aug. 
1999, T. F. Houston, WAM (27532); 4$, Watheroo NP, 3-5 Oct. 1980, T. 
F. Houston, on flowers of Daviesia divaricata, WAM (13837,39^41); (3,18 
km NW Eneabba, 9-12 Sep. 1987, T. F. Houston, on flowers of Daviesia, 
WAM (13640); 2$, c. 5 km W Eurardy HS, 24 Aug. 1999, T. F. Houston, 
WAM (27506-07); 5$, 5 km 23°N of W Eurardy HS, 27 Aug. 1999, T. 
F. Houston, WAM (27500-04); 5$, 4, Kings Park, Western Australia, 10 
Oct. 1988, T. F. Houston, WAM (18456-61); <3, Knights Track Beekeepers 
Reserve Eneabba-Leeman-Jurien area, 2 Jul. 1987, M. Lyons, on flowers 
of Daviesia quadrilatera, WAM (13637); 2(3, Margt R. Dist., Aug. & Oct. 
1912, WAM (13795) & ANIC; 4$, Stirling Range, 17 Oct. 1974, C. A. & 
T. F. Houston, SAM (32-024641-44); 3$, Swanboume, WAM (13782-84); 
$, Swan River, Sep., L. J. Newman, WAA (80828); 6(3, Swan River, Jul., D. 
Swan, WAA (45274-6,79-81); (3, Tathra NP, 26 Jul. 1995, R. P. McMillan, 
WAM (21022); 3<3, Yanchep-Lancelin Rd 10 km ESE Guilderton, 26 Aug. 
1982, T. F. Houston, on flowers of Daviesia divaricata, WAM (13634—36). 
Diagnosis 
Length 13-14 mm; eyes not hairy; metasomal bands broad, 
white. Male flagellum distinctively modified (Fig. 14); female 
labrum elongated, tectiform (Fig. 15); malar space short. 
