38 
Records of the Australian Museum (2012) Vol. 64 
T. dowerinensis T sericeus T. serotinus n.sp. 
Figs 41^-3. Eighth sternum of Trichocolletes males, ventral view: (41) T. dowerinensis, (42) T. sericeus, and (43) T serotinus n.sp. 
distal ends of femora, fore and mid tibiae and scape orange- 
brown; scape often with dark suffusions, occasionally 
black; fore and mid tibiae with dark suffusions medially; 
mandible amber medially; flagellum (other than FI) brown 
ventrally. Tl-5 with moderate width gold bands.— Clypeus 
densely punctate basally, apical 20% impunctate, basal 
suture indistinct; scutum dull with strong pit-reticulation 
obscuring close punctures.— Face densely covered with 
long, plumose, orange hair. Scutum closely covered with 
plumose dull orange hair; fore basitarsus with weak fringe 
of pale hair; anterior margin of hind tibia with close fringe 
of erect pale hair. 
Female (AM K.334811) Head width 4.00 mm, body 
length 11.5 mm. Relative dimensions: HW 50, HL 39, UID 
30, UFW 33, LID 30, DMA 31, HVO 3, WOC 7, MOD 
4, OOD 8, IAD 8, ASD 3, AOD 9, ML 22, BMW 9, MSL 
0.8, SL 16, SW 3, FL c. 29.— Eyes not hairy; face wider 
than long, inner orbits slightly convergent ventrally; malar 
space short (length c. 0. lx basal mandibular width); clypeus 
transversely convex, basal suture straight; flagellum short; 
middle flagellomeres c. l.lx as long as wide; inner hind 
tibial spur with c. 11 long teeth; tarsal claws with short 
basal ramus; pygidial plate entire with distinct medial 
elevation. —Labrum and mandible deep amber; flagellum 
brown ventrally; legs dark brown. Tl-4 with gold bands 
of moderate width. —Clypeus polished, weakly reticulate 
basally, with close, large punctures, supraclypeal area 
impunctate medially; scutum dull with moderately strong 
pit-reticulation and close to dense small punctures.— 
Face with long, plumose hair, white, sparse to open on 
clypeus, white, dense in paraocular areas and close, dull 
orange-brown on frons. Scutum closely covered with short, 
plumose dark-tipped orange-brown hair; hind tibial scopa 
white, becoming brown towards posterior margin; pre- 
pygidial fimbria pale brown. 
Remarks. See remarks about misidentification of T. marginatus. 
Distribution. Cooler regions of southeastern Australia 
including Tasmania (AA, FLB, FLI, KAN, NAN, SB, SCP, 
SEC, SEH, TSR,VM) (Fig. 114). 
Etymology. The specific name is a Latin adjective meaning 
late in coming, referring to the flight phenology. 
Trichocolletes simus n.sp. 
Figs 75, 115 
Type. Holotype S, Eneabba, Western Australia, 18 May 
1979, R. R McMillan, on Daviesia, in WAM 13982. 
Specimens examined. The holotype and the following. Western Australia: 
% same data as holotype WAM (13981); S, 10$, Cockleshell Gully 
(30.09°S 115.06°E), 28 May 1987, M. Lyons, on flowers of Daviesia, 
WAM (13624-33, 13983). 
Diagnosis 
Length 11-12 mm ; eyes not hairy; clypeus strongly deflexed 
and weakly protuberant; palpi very short; metasomal bands 
silver-white; scutal hair orange. Male T 1,2 with large orange- 
brown areas. 
Descriptions 
Male (holotype).— Head width 3.80 mm, body length 11.3 
mm. Relative dimensions: HW 50, HL 36, UID 29, UFW 
30, LID 28, DMA 28, HVO 6, WOC 15, MOD 4, OOD 7, 
IAD 7, ASD 4, AOD 7, ML 16, BMW 7, MSL 0.5, SL 12, 
SW 3, FL c. 48.— Eyes large, not hairy; face narrow, inner 
orbits converge ventrally; clypeus transversely convex, 
strongly deflexed near base so that lower margin protrudes 
only slightly; malar space short (length c. 0. lx basal width 
mandible); palpi short, labial palpus < Vi as long as post 
palpal part of galea; ocelloccular area strongly depressed; 
flagellum moderately short, middle flagellomeres c. 1.5x 
as long as wide; fore basitarsus short; hind legs very long, 
slender; tarsus as long as hind tibia; hind basitarsus 5.4x 
as long as wide; posterior margin basitibial area with 
strong, pigmented carina reaching apex. Genital capsule 
like that for T. macrognathus n.sp. (Fig. 35); S7 lateral 
lobes rounded, posterior projections and basal teeth 
obsolete (Fig. 75).— Labrum, mandible, scape and most 
of flagellum ventrally, most of T 1,2 and 7, tarsi, mid and 
hind femora and tibiae, inner surface fore tibia orange- 
brown; remaining areas of legs, flagellum dorsally, small 
medial suffusions on T 1,2 and large lateral spots on T2 dark 
brown. Tl-5 with silver bands, ferruginous across anterior 
margin. —Scutum dull, strongly reticulate.— Face below 
ocelli densely covered with long, erect, bright orange hair. 
