Table 3.

The number of samples, age of bees when sampled, mean lipid mass (± SE) (μg), and lipid mass range per female for cuticle and Dufour’s gland of extracted lipids from the cuticles and Dufour’s glands of field-collected and laboratory-reared Megachile rotundata and Osmia lignaria females

Source	Megachile rotundata		Osmia lignaria
	Field	Laboratory	Field	Laboratory
N; age	10; 2–4 wks	12; 3–7 days	10; 2–7 days	11; 2–3 days
Cuticle Mean	31.02 ± 2.13	60.77 ± 4.21	74.02 ± 8.09	127.96 ± 7.73
Cuticle Range	21.94–40.51	37.16–89.49	30.63–110.32	92.07–166.73
Dufour’s Gland Mean	0.81 ± 0.21	1.09 ± 0.26	7.72 ± 2.70	13.01 ± 2.91
Dufour’s Gland Range	0.41–2.61	0.28–3.35	2.73–31.66	3.71–33.24