Re: Thora[co]bombus
I am no great fan of subgenera, but I have been puzzled by the use of Thoracombus as the subgenus for carder bees. Logic always suggested that it should be ThoracoBOmbus, but R6 and NBNG have Thoracombus and I had lazily assumed that it was some historical misprint that had persisted.
However, most Google results - and more importantly Paul Williams at NHM (http://www.nhm.ac.uk/research-curation/research/projects/bombus/th.html) - use ThoracoBOmbus, so I would expect that to be the correct form, and I think the dictionary entry should be:
Thoracobombus Dalla Torre, 1880.
I seem not to be the only one who has been misled, as the BWARS Handbook uses Thoracombus as well (so I am in good, and probably equally embarrassed company). Also the OU site www.iSpot.org.uk and other resources linked to the R6/NBN aculeate dictionary.
Murdo