Table 1. Information on local assemblages included in analysis including name of contributor, number of sites provided, location and size of area sampled, duration of sampling, Bombus richness in sites, regional species pool as determined using Williams(1996) equal area grid cells and publication information.

Data contributor	Number of sites	Location	Site Size (ha)	Sampling time	Richness	Regional Species Pool	Publication
S. Colla	1	Southern Ontario	0.4	full transect walked	6	18	Colla and Packer(2008)
E. Evans	2	Minnesota	0.06	60–120 mins	5–7	13	unpublished
R. Hatfeld	20	California	0.377	45 mins	2–8	17	Hatfield and Lebuhn (2007)
S.Hendrix	13	Iowa	.5–1	60–120 mins	2–6	15	Hendrix, Kwaiser and Heard (2010); Kwaiser and Hendrix (2008); unpublished
C. Kearns	15	Colorado	0.385	variable	2–4	20	Kearns and Oliveras(2009)
R. Malfi and N. Williams	10	Pennsylvania and New Jersey	0.5	120 mins	4–6	16	unpublished
A. Tripodi	49	Tennessee and Arkansas	.02–5	15–60 mins	2–5	11,13	unpublished