26 
Records of the Australian Museum (2012) Vol. 64 
as hind tibia; hind basitarsus 4.6x as long as wide; posterior 
carina of basitibial area reaches apex. Genital capsule similar 
to that for T. orientalis n.sp. (Fig. 37); S7 with rectangular 
lateral lobes, large basal teeth and posterior projections (Fig. 
64). — Labrum, mandible medially, scape, tarsi and tibiae 
orange-brown; scape often with dark suffusions, occasionally 
entirely dark brown; tibiae with variable amounts of dark 
brown; flagellum brown ventrally. Tl-5 with narrow silver 
bands, narrowly tinted brown across anterior margin; T7 
reddish. —Clypeus densely punctate basally, apical 20% 
polished, impunctate. Scutum shining with moderately strong 
pit-reticulation and close punctures. —Face with dense, 
finely-branched, long, orange hair; gena densely covered with 
white plumose hair. Scutum openly covered with long, erect, 
plumose, pale orange hair; fore basitarsus with plume of long, 
minutely branched hair on proximal half; anterior margin of 
hind tibia with row of openly spaced, long, white hair. 
Female (AM K.344732). —Head width 4.40 mm, body length 
12.9 mm. Relative dimensions: HW 50, HL 39, UID 29, UFW 
31, LID 32, DMA 30, HVO 4, WOC 13, MOD 3, OOD 8, 
IAD 9, ASD 3, AOD 9, ML 21, BMW 7, MSL 2.0, SL15, SW 
3, FL c. 32. —Eyes hairy; face broad, inner orbits divergent 
ventrally; malar space c. 0.3x basal mandibular width; clypeus 
convex, flattened sagittaly; basal suture concave; width 
supraclypeal area more than twice length subantennal suture; 
base of clypeus and supraclypeal area approximately coplanar; 
epistomal suture between base of clypeus and base of mandible 
distinctly concave; distance from anterior tentorial pit to base 
mandible 3x distance between pit and base of clypeus; labrum 
uniformly convex, length 0.6x width; middle flagellomeres c. 
1.2x as long as wide; hind tibial spur with c. 9 strong teeth; 
tarsal claws simple; pygidial plate entire, flat or with slight 
medial elevation. —Labrum , mandible medially, tarsi, hind 
tibia, extremities of fore and mid tibiae, distal ends of femora 
orange-brown; remainder of legs and flagellum ventrally, 
dark brown. Tl-4 with narrow silver bands, weakly stained 
brown across anterior margin. —Clypeus weakly reticulate 
basally, punctures large and dense medially, sparse laterally, 
fine and dense in apicolateral corners. Scutal sculpture as 
for male.— Face with long, plumose, white or pale orange- 
brown hair, sparse on clypeus and supraclypeal area, dense in 
paraocular areas and on frons. Scutum closely covered with 
moderately short, plumose, dark-tipped, dull orange hair; 
prepygidial fimbria dark brown; scopal hair orange-brown 
laterally, darker medially. 
Remarks. Similar to several other species. May be 
distinguished from from T albigenae n.sp. by the strongly 
protuberant clypeus and longer malar space; from T. grandis 
n.sp. by smaller size and longer malar space; from T. capillosus 
n.sp. by dense genal hair (male) and broader supraclypeal 
area (female); and from T. dundasensis n.sp. (female) by 
curvature of the epistomal suture and coplanarity of clypeus 
and supraclypeal area. 
This species is referred to as F249/M223, F272/M239, 
F270 and F252 (part) in Houston (2000). 
Etymology. The specific name is a transliteration of the 
Greek adjective meaning with white cheeks, referring to the 
dense genal hair of the male. 
Distribution. Southwestern Australia (AW, COO, ESP, GS, 
JF, MAL, SWA, WAR, YAL) (Fig. 101). 
Trichocolletes luteorufus n.sp. 
Fig. 102 
Type. Holotype $,13 km NE Warriedar, Western Australia, 
28 Aug. 1981, T. F. Houston, on flowers of Cassia 
chatelainiana, in WAM 13656. 
Specimens examined. The holotype and the following. Western Australia: 
2% same data as holotype, WAM (13657-58); % 12 km ESE Mt Magnet, 
3 Sep. 1981, T. F. Houston, onflowers of Ptilotus obovatus, WAM (13660). 
Diagnosis 
Female (male unknown) robust; eyes not hairy; metasomal 
bands wide, orange-gold; posterior half of metasoma with 
conspicuous orange hair. 
Description 
Female (holotype).— Head width 4.65 mm, body length 15.2 
mm. Relative dimensions: HW 50, HL 35, UID 30, UFW 33, 
LID 32, DMA 29, HVO 5, WOC 14, MOD 3, OOD 9, IAD 7, 
ASD 4, AOD 9, ML 20, BMW 8, MSL 0.5, SL 15, SW 3, FL 
c. 36.— Eyes not hairy; face broad, inner orbits parallel; malar 
space short (length c. 0. lx basal mandibular width); clypeus 
gently convex; middle flagellomeres c. 1.2x as long as wide; 
inner hind tibial spur with c. 7 strong teeth; tarsal claws with 
large inner ramus; pygidial plate broad, entire with coarse 
sculpture.— Labrum, mandible, anterior faces of fore femur 
and tibia orange-brown; remainder of legs dark brown. Tl-4 
with wide, deep gold bands.— Clypeus reticulate, densely 
covered with large punctures; supraclypeal area with smaller, 
contiguous punctures.— Face with long, white plumose 
hair, becoming pale orange on frons, close on clypeus and 
supraclypeal area, dense in paraocular areas and on frons; 
vertex with long, plumose, pale orange hair. Scutum closely 
to densely covered with tightly branched, pale orange hair 
with dark brown tips; metasomal terga with open covering 
of short, semierect, bright orange-gold hair progressively 
longer and denser posteriorly; prepygidial fimbria bright 
orange-gold; hind tibial scopa dark brown. 
Remarks. This species is referred to as F253 in Houston 
( 2000 ). 
Etymology. The specific name is a Latin adjective referring 
to the bright orange colour of the female metasoma. 
Distribution. Known from two locations in Western 
Australia near Mount Magnet (MUR, YAL) (Fig. 102). 
Trichocolletes macrognathus n.sp. 
Figs 16-18, 35,65, 103 
Type. Holotype 13 km S Wanoo, Western Australia 
[26.49S, 114.37E], 24-28 Aug. 1984, T. F. Houston & B. 
R Hanich, on flowers of Baeckea, in WAM 13671. The 
co-ordinates on the label refer to the location of Wanoo at 
26°49'S 114°37'E. 
Specimens examined. The holotype and the following. Western Australia: 
% 11 kmENE Anketell, 4-6 Sep. 1981, T. F. Houston, onflowers of Cassia 
phyllodinea or charlesiana, WAM (13659); S, Denham-Hamelin Rd NW 
