Batley & Houston: Australian bee genus Trichocolletes 
39 
Scutum openly covered with long, finely-branched, orange 
hair; fore trochanter and femur with long, orange hair; fore 
basitarsus with long golden hair; hind femur with weak hair 
tuft at distal end. Semi-adpressed hair on T3-6 somewhat 
paler than underlying integument. 
Female (WAM 13981).— Head width 3.55 mm, body length 
11.5 mm. Relative dimensions: HW 50, HL 42, UID 30, 
UFW 32, LID 30, DMA 29, HVO 5, WOC 14, MOD 4, 
OOD 8, IAD 9, ASD 3, AOD 9, ML 20, BMW 7, MSL 0.5, 
SL 14, SW 3, FL c. 36.— Eyes not hairy; face approximately 
quadrate, inner orbits slightly convergent ventrally; clypeus, 
malar space and palpi as for male; middle flagellomeres 
c. l.lx as long as wide; inner hind tibial spur with c. 8 
long slender teeth; tarsal claws with minute inner rami; 
pygidial plate large, truncate, with broad medial elevation 
and narrow margin. —Lab rum and mandible orange-brown; 
flagellum dorsally dark brown, paler ventrally; legs dark 
brown; pygidial plate red-brown. Tl-4 with moderate width 
white bands, ferruginous across anterior margin. —Clypeus 
polished with weak reticulation, closely covered with large 
punctures; supraclypeal area densely punctate.— Face with 
long, plumose, pale orange hair, sparse on clypeus and 
supraclypeal area, dense in paraocular areas and on frons. 
Scutum closely covered with plumose, dark-tipped orange 
hair; prepygidial fimbria very pale to mid brown. 
Remarks. Association of the sexes is based morphological 
similarities, including length of palpi and shape of clypeus 
and on two coincident collection events. This species is 
referred to as F251 (part), F264/M235 in Houston (2000). 
Distribution. Geraldton Sandplains, Western Australia (GS) 
(Fig. 115). 
Etymology. The specific name is a Latin adjective meaning 
sub-nosed, referring to the shape of the clypeus. 
Trichocolletes soror n.sp. 
Figs 76, 116 
Type. Holotype <$, East Yuna Reserve 34 km WNW 
Mullewa, Western Australia, 13-16 Sep. 1984, T. F. Houston, 
on yellow and red pea flowers, in WAM 14002. 
Specimens examined. The holotype and the following. Western 
Australia: 2$, same data as holtype, WAM (14003-04); $, East Yuna 
Reserve 34 km WNW Mullewa, 23-24 Sep. 1983, C. & T. Houston, on 
flowers of Dampiera near pea flowers, WAM (13999); East Yuna 
Reserve 34 km WNW Mullewa, 28-29 Aug. 1984, T. F. Houston & B. R 
Hanich, on flowers of Comesperma, WAM (14000); $, East Yuna Reserve 
34 km WNW Mullewa, 24-28 Aug. 1985, T. F. Houston, on flowers of 
Comesperma scoparium, WAM (14001); $, 9 km 13° N of W from 
Eurardy HS (27.6722°S 114.7167°E), 25 Aug. 1999, T. F. Houston, on 
flowers of Mirbelia spinosa, WAM (27493); 13 km 35°S of W Eurardy 
HS (27.7611°S 114.5694°E), 25-26 Aug. 1999, T. F. Houston, on flowers 
of Jacksonia velutina, WAM (27494); 3cL 10 km S Nerren Nerren HS, 
19 Aug. 1980, C.A.Howard & T. F. Houston, on flowers of Chorizema 
ericifolium, WAM (14005-07); 14 km S Nerren Nerren HS, 28 Aug. 
1984, T. F. Houston & B. P. Hanich, on yellow pea flowers, WAM (14008); 
$, 8 km NE Tamala HS (c. 27°S 114°E), 21-23 Aug. 1980, C. A. Howard 
& T. F. Houston, on flowers of Mirbelia ramulosa, WAM (14009). 
Diagnosis 
Eyes not hairy; metasoma partly or wholly orange or red- 
brown; metasomal bands gold. Male metasoma slender; Tl,2 
usually with large areas of orange-brown; posterior margin of 
S7 not sinuate (Fig. 76). Female robust; metasoma red-brown 
with broad tergal bands, occasionally indistinct; pygidial 
plate with deep emargination; clypeus uniformly convex. 
Descriptions 
Male (holotype).— Head width 3.80 mm, body length 13.6 
mm. Relative dimensions: HW 50, HL 40, UID 32, UFW 
32, LID 30, DMA 29, HVO 3, WOC 15, MOD 4, OOD 9, 
IAD 10, ASD 3, AOD 8, ML 18, BMW 6, MSL 0.5, SL 
13, SW 3, FL c. 53.— Eyes not hairy; face wider than long, 
inner orbits slightly convergent ventrally; malar space short 
(length c. 0. lx basal mandibular width); length of flagellum 
greater than head width; middle flagellomeres c. 1.5x as 
long as wide. Legs slender; mid tibia slightly incrassate; 
hind tarsus 1.2x as long as hind tibia; length basitarsus 3.6x 
width; basitibial area short, posterior margin with angular 
edge but no carina. Genital capsule like that for T. rufibasis 
(Fig. 39); S7 lateral lobes triangular with strongly rounded 
corners and smooth posterior margin, basal teeth obsolete 
(Fig. 76).— Head and mesosoma predominantly black; 
labrum and ventral half clypeus cream; mandible, scape, 
flagellum ventrally, tarsi, fore tibia, both ends mid and hind 
tibiae and distal ends of femora orange-brown; flagellum 
dorsally dark brown. T1 orange-brown with broad, transverse 
dark brown band; T2 orange-brown with narrow, transverse 
brown band ending in large patches laterally; lateral margin 
with large black oval mark. Tl-5 with wide, gold bands; T7 
dull orange-brown; S2,3 mostly yellow-brown; remaining 
sterna dark brown with yellow-brown areas basally.— Scutum 
dull with strong pit-reticulation obscuring punctures.— Face 
densely covered with strongly branched, orange hair, erect 
on clypeus. Scutum and scutellum openly covered with long 
plumose dull orange hair; fore basitarsus without plume. 
Female (WAM 14003).—Head width 3.95 mm, body length 
12.6 mm. Relative dimensions: HW 50, HL 39, UID 30, UFW 
32, LID 31, DMA 30, HVO 4, WOC 14, MOD 4, OOD 8, 
IAD 8, ASD 3, AOD 9, ML 20, BMW 7, MSL 0.5, SL 15, 
SW 3, FL c. 27.— Eyes not hairy; face wider than long, inner 
orbits almost parallel; malar space short (length c. O.lx basal 
mandibular width); clypeus transversely convex; middle 
flagellomeres c. 0.85x as long as wide; inner hind tibial spur 
with c. 8 long teeth; tarsal claws with large, triangular inner 
ramus; pygidial plate with deep, narrow emargination. —Head 
and mesosoma predominantly black; mandible, labrum, tarsal 
segments 4 and 5 and extreme ventral margin of clypeus 
orange-brown; ventral half of clypeus and remainder of legs 
dark brown; metasomal terga red-brown with varible dark 
suffusions; T2 with large black oval marks laterally. Tl^l with 
broad, gold bands, somet im es indistinct.— Clypeus polished, 
weakly reticulate basally, with dense, large punctures; 
supraclypeal area densely covered with smaller punctures; 
scutal sculpture as for male. —Paraocular areas and frons with 
long, dense, plumose, orange hair; clypeus, supraclypeal area 
and gena with sparse, long, orange hair. Scutum and scutellum 
openly covered with moderately short, plumose, dull orange 
hair; hind tibial scopa honey-brown; T1 laterally with sparse, 
long, pale hair; prepygidial fimbria pale brown. 
