Apt On Two new Parasitic Mites. 
pocket behind the antitragal ridge * ; 
skull short and high ; inner portions 
of upper m! and m? slender and weak ; 
last lower molar without median 
external cusp; (upper lip grooved ; 
metatarsus hairy down to plantar 
pad; hallux absent). 
¢. Pollex retained. 2.2... 58 scne vce ate Cynictis. 
a’. Pollex suppressed ...0.cseeeseees Paracynictis. 
LUIT.—On Two new Parasitic Mites (Myocoptes hintoni 
and Psoroptes natalensis). By STANLEY Hirst. 
(Published by permission of the Trustees of the British Museum.) 
Myocoptes hintoni, sp. n. 
@. The minute little scutwm (at the extreme anterior end 
of the dorsum) angular posteriorly in the middle, but not 
ending in a slender, median, spine-like process, as in J/. mus- 
culinus, Koch, and M. tenaz, Michael. The new species can 
‘also be readily recognized by the four very long hairs (a pair 
on each side) that are present (on the venter) at the posterior 
end of the body, instead of only two long hairs in this position 
(one on each side), as in M. musculi, M. tena, ete. 
Length of body 340 p, its width 170 p. 
Host: English Squirrel (Scezwrus vulgaris), Exeter, October 
1918. 
Psoroptes natalensis, sp. n. 
¢@. Second hair from each side on abdominal lobe fairly 
long and shaped like a very fine lance, the distal half being 
distinctly flattened (blade-like), instead of cylindrical as in 
P. ovis, P. capre, P. cuniculi, P. equi (and also P. bovis, 
according to Berlese’s description and figure). Middle hair 
on lobe long and fine. Outermost hair quite short. Tnner- 
most hair very fine and comparatively long. 
Length of body (including capitulum and posterior lobes) 
420 p, its width 290 p. 
Material, A number of specimens found on cattle at 
Richmond, Natal, 1896 (C. D. Soar’s collection). 
Note.—In the genus Chorioptes (including C. bovis) the 
central hairs on the abdominal lobes of the male are modified 
in much the same way as in this new species, but the flat- 
tened portion is very much wider and the pedicles of the tarsi 
bearing the pulvilli are quite short instead of elongated and 
segmented, as in Psoroptes natalensis, etc. . 
* The characters of the feet and ear need verification in the case 
of Paracynictis, only dried skins of the genus being available for 
examination. 
