Abstract
Eugamasus sphecophilus Cooreman is transferred to the genus Vulgarogamasus, redescribed (female, male and deutonymph), and proposed as a senior synonym of Poecilochirus britannicus Hyatt. The male and female deutonymph of the species are distinguished for the first time. Vulgarogamasus sphecophilus comb. nov. is recorded in association with the social wasp Dolichovespula saxonica for the first time, where it was observed causing significant egg mortality. As the result of the new synonymy, the geographical range of V. sphecophilus now includes the British Isles.References
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