The Tergal Gland Secretion of the Two Rare Myrmecophilous Species Zyras collaris and Z. haworthi (Coleoptera: Staphylinidae) and the Effect on Lasius fuliginosus

Table 1

Substances found in the headspace of a flask containing rove beetles of the genus Zyras, which have been teased using a magnetic stir bar. Numbers in the table refer to numbers in Figure 1. Relative proportions of the substances between the beetles were calculated in accordance with [12]. The substance with the highest peak area for each row is the reference (= 1.00).

		Z. collaris		Z. haworthi
	Substances	Rel. peak area	Rel. proportion	Rel. peak area	Rel. proportion
1^1	α-pinene^2	2.6	0.20	23.8	1.00
2	β-pinene^3	41.3	1.00	57.0	0.76
3	Myrcene	51.9	1.00	13.6	0.14
4	Limonene	4.2	1.00	5.5	0.72

 ¹Numbers refer to numbers in Figure 1.
^2,3As proposed by the mass spectra database (see Section 2).