NOTES ON THE MITES (ACARI) OF ESSEX
63
Haemogamasus horridus Michael
One female in a mouse's nest at Hales Wood, Saffron Wal-
den, on January 14, 1961.
Laelaps agilis (C. L. Koch)
Five females and one male on a wood mouse at Woodford
Green on May 8, 1960, and two females on a wood mouse
from Skipper's Island, Thorpe-le-Soken, on April 15, 1960.
Proctolaelaps (P.) hypudaei (Oudemans)
About twenty females on a wood mouse at Woodford Green
on August 3, 1960.
Proctolaelaps (P.) pomorum (Oudemans)
A female on the bee Bombus terrestris (L.) at Goldings Hill,
Loughton, on May 8, 1960.
Pneumolaelaps bombicolens Canestrini
Several females from the above bee; one female from
Bombus terrestris (L.) at Skipper's Island, Thorpe-le-Soken,
on April 15-18, 1960.
Hypoaspis sp.
Five females of this genus from Bombus terrestris (L.) at
Grays on August 13, 1960.
Coleolaelaps sp.
A female of this genus from a Stag beetle, Lucanus cervus
(L.), taken in Essex by R. J. Knowles on June 23, 1960.
Spinturnicidae Oudemans 1901
Spinturnix myoti (Kolenati)
Males and females have been found on both Daubenton's
bat, Myotis daubentoni (Kuhl), and Natterer's bat, Myotis
nattereri (Kuhl), in the deneholes at Grays on January 6-7,
1962.
Mites of this family are thought to be exclusively parasites
of bats.
Rhodacaridae Oudemans 1902
Euryparasitus emarginatus (C. L. Koch)
One deutonymph on a wood mouse at Skipper's Island,
Thorpe-le-Soken, on March 20, 1960.
Uropodidae Berlese 1917
Over a dozen sessile deutonymphs of this family were found
on the beetle Hister unicolor L. at Woodford Green in 1958.
Canestriniidae Berlese 1884
Canestrinia doricola Berlese
Five females and one male from the beetle Dorcus paralleli-
pedus (L.) in an elm stump at Billericay on May 17, 1959,
by R. J. Knowles.
I am most grateful to Dr G. O. Evans and Mr K. Hyatt of the
British Museum (Natural History) for identifying the specimens,
and to Mr E. F. Williams for hospitality whilst collecting on
Skipper's Island.