Abstract The deutonymphs (or hypopi) of two new species of Hemisarcoptidae (Acari) of the genera Congovidia Fain & Elsen, 1971 and Divilia Sevastianov, 1969, are described from coccinellid beetles (Coleoptera: Coccinellidae) from Britain, i.e. Congovidia coccinellidarum n. sp. from eight genera and nine species of Coccinellidae and Divilia occidentalis n. sp., represented by only one deutonymph collected from Chilocorus renipustulatus. Congovidia coccinellidarum was also collected from Rhinocimus hemirostris (Coleoptera: Pythidae) from Britain. The most infested ladybird beetle was Halyzia sedecimguttata, a broad-leaved deciduous woodland specialist showing a marked preference for sycamores.