LV.—Studies of Acari.—7th series: “Records and descriptions of mites new to the British fauna, together with short notes on the biology of sundry species

Abstract

This paper is mostly concerned with records of mites new to the British Isles. Odd notes on the biology of some species previously recorded from these islands deal with various aspects of the general biology of the different species. The following species are described as new to science:—Parasitus hibernicus, Phaulodiaspis euris, Ettmulleria dipterorum, and Schwiebea boletophagi. The newly discovered male of Polyaspinus cylindricus Berl. is described fro the first time and its importance in the study of the comparative parative morphology of the Mesostigmata is discussed. The division of the genus Pergamasus by Hull in 1918 is treated in some detail and his subgenera, Plesiogamasus, Paragamasus are promoted to generic status. Some remarks are made on the generic divisions of the Hypoaspis complex of the Laelaptidae and two new genera of Dr. Hull, Chamolaelaps and Halbertia, are brought forward and the types of all the above genera of Dr. Hull designated. New records of Leptus porcinus Hull, 1918 are given and the species is figured in detail.