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Extracted from: Timberlake P.H., (1969). A Contribution to the Systematics of North America Species of Synhalonia (Hymenoptera, Apoidea). University of California Publications in Entomology Volume 57
This is a little-known species and I have seen only the type. It is very similar to the female of edwardsii but differs in the broader white bands of the abdomen. The band on the second tergite covers almost the entire segment, receding slightly from the apical margin across the middle and showing no black across the base as in edwardsii. The bands on two following segments cover somewhat more than the apical depression, with the long, overlying hairs entirely pallid.
Extracted from: Cockerell, T.D.A. (1906). Some Bees from Washington State. The Canadian Entomologist pp. 277 - 282.
Female. length about 14.5 mm., the light pubescence gray to white,
only very faintly yellowish on thorax above; hair on inner side of basal
joint of hind tarsi clear ferruginous; flagellum very faintly reddish
beneath; tegulae ferruginous, fuscous basally; abdomen with very broad
bands of white tomentum on segments 2 to 4; the white band on 5 very
broadly interrupted in the middle by dark rufo-fuscous; wings dusky, with
a yellow tint, the nervures piceous; no dark hair on mesothorax or scutellum ; facial quadrangle somewhat broader than long ; hind spurs
pale ferruginous, not at all hooked. The scopa of the hind tibiae is
slightly plumose only, as in T. Belfragei. In my tables this runs (making
allowance for the large amount of white at sides of segment 5) to T.
Cordleyi j if sought in the series with the apical hair reddish, it runs to
T. speciosaor Cordleyi. It differs thus from various species which might
be confused with it:
1. From speciosa by its smaller size, silvery white (not yellow) hair
of hind tibiae, different colour of hair of apex, gray hair of mesothorax,
etc. The pale bands 011 segments 2-4 are as in speciosa, except that that
on 2 is not appreciably narrowed in the middle, and that on 3 has its
upper edge straight (strongly concave laterally in speciosa). The bands
are also whiter.
2. From Cordleyi by the whiter and much broader abdominal bands,
the upper lateral corners of the second segment being covered with
pubescence; whereas in Cordleyi they are broadly black. The hair of the
mesothorax is also quite differently coloured
3. From Beifragei by the much broader light bands of abdomen , and
the dullish gray aspect of the whole abdomen, instead of the clear black
and white of Beifragei
4. From Fowleri by the larger size, much broader band on second
abdominal segment, etc.
5. From virgata by the hair of mesothorax, ornamentation of
abdomen, etc.
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