16 
Records of the Australian Museum (2012) Vol. 64 
Diagnosis 
Length male c. 12 mm, female c. 13 mm; eyes not hairy; 
metasomal bands moderately wide; prominent supraclypeal 
area inclined to clypeus, viewed laterally. Male scapes 
swollen; supraclypeal area bare, polished, impunctate on 
anterior surface; female clypeus with open, large punctures. 
Descriptions 
Male (AM K.316503).— Head width 3.6 mm, body length 
11.9 mm. Relative dimensions: HW 50, HL 41, UID 33, 
UFW 32, LID 30, DMA 30, HVO 4, WOC 15, MOD 5, 
OOD 9, IAD 8, ASD 3, AOD 8, ML 19, BMW 6, MSL 
1.5, SL 12, SW 6, FL c.44. —Eyes not hairy; face narrow, 
inner orbits subparallel; malar space c. 0.3x basal width 
mandible; scape swollen (width 0.48x length); anterior face 
supraclypeal area pentagonal, weakly depressed medially, 
inclined relative to clypeus viewed laterally; flagellomeres 
Fl-6 flattened ventrally and conspicuously hirsute; middle 
flagellomeres slightly longer than wide. Legs robust; mid 
basitarsus short (length 2.3x width); hind tarsus l.lx as 
long as hind tibia; hind basitarsus 4.3x as long as wide; 
basitibial area flattened but acarinate. Genital capsule 
similar to that for T. sericeus (Fig. 40); S7 with triangular 
lateral lobes, basal teeth obsolete, posterior projections 
small (Fig. 53).— Labrum, mandible medially, scape, mid 
and hind tarsi, distal ends femora, proximal ends tibiae, 
ventral surfaces flagellomeres Fl-6, distal half FI 1 orange- 
brown; legs and remainder of flagellum brown. Tl-5 with 
broad, orange-gold bands, ferruginous across anterior 
margin.—Anterior face of supraclypeal area polished 
and impunctate, clypeus densely punctate, except apical 
margin; scutum dull with strong pit-reticulation obscuring 
punctures.— Face, except supraclypeal area, with dense, 
long, minutely-branched, bright orange hair. Scutum with 
close, long, plumose, orange hair; fore basitarsi without 
distinct plume; posterior margin of mid basitarsus with 
dense fringe of long, golden hair; trochanters and hind 
femur with copious, long, golden hair. 
Female (WAM 13568). —-Head width 4.2 mm, body length 
13.0 mm. Relative dimensions: HW 50, HL 39, UID 31, 
UFW 33, LID 32, DMA 30, HVO 3, WOC 15, MOD 4, 
OOD 8, IAD 8, ASD 4, AOD 9, ML 19, BMW 7, MSL 2, 
SL 15, SW 3, FL c. 28.— Eyes not hairy; face approximately 
quadrate, inner orbits parallel; length malar space c. 
0.3x basal width mandible; basal suture clypeus straight; 
supraclypeal area with triangular anterior face at distinct 
angle to clypeus viewed laterally; flagellum moderately 
short; middle flagellomeres approximately as long as wide; 
inner hind tibial spur with c. 12 long teeth; hind basitibial area 
large, c. 0.3x as long as hind tibia; tarsal claws with large, 
triangular inner ramus; pygidial plate emarginate, strongly 
sculptured.— Labrum, mandible medially, ventral rim of 
clypeus, f3-10 ventrally, orange-brown; scape, remainder 
of flagellum and legs dark brown, with dull orange-brown 
on anterior surface of fore tibia. Tl-4 with moderately wide 
silver-white bands.— Clypeus reticulate with open, large 
punctures; anterior face of supraclypeal area with sparse 
punctures; remainder of face densely punctured; scutum 
dull with strong pit-reticulation. —Face with long, white, 
plumose hair becoming pale orange-brown near ocelli, 
dense in paraocular areas and on frons, sparse on clypeus 
and supraclypeal area. Scutum with close, short, plumose, 
dark-tipped brown hair; hind tibial scopa orange-brown 
except dark brown near basitibial area; prepygidial fimbria 
golden-brown. 
Remarks. The holotypes of T. chrysostomus and T. lucidus 
both carry labels with the word “TYPE” in Cockerell’s hand. 
This species is similar to T. sericeus, which is found in the 
eastern half of the continent. Both sexes have a shorter head 
length than T. sericeus and males may be distinguished by the 
bare, sparsely punctate supraclypeal area and females by the 
less dense punctures of the clypeus. The female specimens 
examined were less brightly coloured than many of the males, 
which may be a result of their collection later in the season. 
This species is referred to as F248/M221 and M222 in 
Houston (2000). 
Distribution. Coastal Western Australia and southern South 
Australia (EYB, GS, MAL, SWA) (Fig. 89). 
Trichocolletes dives (Cockerell) 
Figs 7, 23,31,54, 90 
Anthoglossa dives Cockerell, 1914b, p. 39. 
Trichocolletes (Trichocolletes) dives. —Michener, 1965, p. 79. 
Specimens examined. The holotype Yallingup, nr Cape Naturaliste, 
Western Australia, R. E. Turner, Sep. 14-31 Oct. 1913, BMNH 
Hym.l7.a.393 and the following. Western Australia: Sy Barracca 
Nature Reserve, 8 km NE Muchea, 23 Jul. & 13 Aug. 1999, T. F. Houston, 
on flowers of Daviesia physodes, WAM (27174, 82); Cannington, 16 
Oct. 1954,R. P. McMillan, WAM (13512); $, Chidlow, 1 Jun. 1934, WAA 
(45284); 18 kmNWEneabba, 9-12 Sep. 1987, T. F. Houston, on flowers 
of Daviesia, WAM (13978); S, 16 km NW Eneabba, 24 Jun. 1999, T. F. 
Houston, on flowers of Daviesia trifolia , WAM (27173); 2$, 25 km 15° 
W of N Eneabba, 28 Aug. 1999, T. F. Houston, on flowers of Jacksonia 
hakeoides, WAM (27520-21); § * 28 km 26° W of N Eneabba, 28 Aug. 
1999, T. F. Houston, on flowers of Daviesia divaricata, WAM (27513); 
4(?, ?, 31 km 9°W of N Eneabba, 23-25 Jun. 1999, T. F. Houston, on 
flowers of Daviesia trifolia, WAM (27169-72, 79); <f, $, Mahogany Ck, 
WAM (13511); S, Nabawa, 9 Jul. 1998, S. R. Patterson, WAM (21391); 
S, Stathams, WAM (13505); $, 1.5 km S Yallingup, 12-13 Nov. 1986, T. 
F. Houston, on flowers of Daviesia, WAM (13979); <§, Yanchep-Fancelin 
Road 10 km ESE Guilderton, 28 Aug. 1982, T. F. Houston, on flowers of 
Daviesia divaricata, WAM (13503). 
Diagnosis 
Length c. 14 mm ; eyes not hairy; metasomal bands wide, 
bright gold; clypeus wholly (male) or partly (female) yellow- 
brown and sparsely punctate. Male flagellum very long with 
apical segment expanded and flattened. 
Variation 
Males from the Yanchep-Busselton area at the southern end 
of the known range exhibit generally denser pubescence and 
a curved, ventrally expanded first flagellomere. 
Descriptions 
Male (WAM 27175).— Head width 4.4 mm, body length 
13.9 mm. Relative dimensions: HW 50, HL 34, UID 29, 
UFW 30, LID 32, DMA 32, HVO 5, WOC 13, MOD 3, 
OOD 8, IAD 9, ASD 4, AOD 6, ML 21, BMW 6, MSL 2, 
