Prevalence of Stylopization of Sphex ichneumoneus (L.) (Hymenoptera: Sphecidae) by Paraxenos westwoodi (Templeton) (Strepsiptera: Xenidae)

Table 1

Prevalence of Pseudoxenos westwoodi parasitism of S. ichneumoneus at the Bridger Plant Materials Center, Bridger, MT.

	Sex of host	2006	2007	Both years
Number of wasps examined	both sexes	55	127	182
Stylopized	male	4	6	10
	female	0	10	10
Not stylopized	male	11	19	30
	female	40	92	132
Prevalence of stylopization (%)	male	26.7	24.0	25.0
	female	0	9.8	7.0
	both sexes	7.3	12.6	11.0