On Acarapis woodi, Rennie. 509 
The type is unique, and the exact place of capture is 
unknown. 
This insect is easily separated from all other members of 
the Euprepocnemini by the extremely peculiar shape of the 
last abdominal segments (recalling somewhat the genus 
Prumna, Motch., of the Podismini) and of the cerci. The 
type of its coloration, and especially the deep velvety colora- 
tion of the head and pronotum, is also very striking, and 
should make the insect easily recognisable. 
LIX.—On the Mite (Acarapis woodi, Rennie) associated with 
Isle of Wight Bee Disease. By STANLEY Hixsr. 
(Published by permission of the Trustees of the British Museum.) 
THE discovery of the constant presence of a mite in bees 
suffering from Isle of Wight disease is of considerable 
interest. The first scientific account of the mite and its 
relations with the disease has been published by the discoverers 
(Dr. Rennie, P. B. White, and Miss Elsie J. Harvie) *. 
The present note deals with the affinities of the mite, and 
gives a detailed account of its external structure. My best 
thanks are due to the Rev. G. H. Hewison and Mr. W. 
Herrod-Hempsall for giving me bees infected with Acarap/s 
wood. 
Genus ACARAPIS, Hirst, 1921. 
Acarapis, Hirst, Proc. Zool. Soc, 1921, p. 357. 
Closely allied to Tarsonemus, but differing as follows :— 
Second and third legs of larval stage very short (almost 
rudimentary) and without either claws or pulvillus (whereas 
in the larva of Tarsonemus these legs are about as long as 
the first and provided with paired claws and a pulvillus). 
Female lacking the club-shaped pseudostigmata that are 
present in Tarsonemus, and with the fourth leg shorter and 
wider and provided with more numerous hairs (in this last 
respect somewhat resembling the fourth leg of Scutacarus). 
* Trans. Roy. Soc. Edinburgh, li. part 4, March 1921, pp. 737-779, 
3 pls. ' 
