On Three new Parasitic Mites. 37 
raised towards the apex and furnished with biseriate incurved 
pale hairs and single central row of small tubercles; the 
anterior cox are widely separated, but the prosternal process 
is obscure. 
Length 14, breadth *9 mm. 
Hab, Sarawak, Mt. Matang (Bryant). 
It is impossible to thoroughly examine this unique speci- 
men, as the head is much depressed over the prosternum ; 
but, from what can be seen, it appears to approximate to 
Strophionocerus (Teniocerus) eutomoides, Bldf. 
Ill.—On Three new Parasitic Mites (Leptus, Schéngastia, 
and Demodex). By Stanuey Hirst. 
(Published by permission of the Trustees of the British Museum.) 
Leptus (Trombicula?) similis, sp. n. 
Very like Leptus autumnalis, Shaw, in most respects, but 
the hairs on the legs are not nearly so strongly feathered. 
Claws of legs shorter than in ZL. autnmnalis, those of the 
second pair being especially short. The rod-like hair on 
tarsus of first leg straighter and longer than in L. autumnalis. 
Scutum very like that of ZL. autumnalis, the posterior 
margin being somewhat convex in outline. Pseudostigmata 
situated in middle of scutum (almost equidistant between 
anterior and posterior margins) ; they are not very long 
being apparently shorter than in 4. autwmnalis, and are very 
fine and plain tor the greater part of their length, but the 
terminal part is distinctly feathered. Hairs on dorsum about 
twenty in number; usually there are paired outer hairs (one 
on each side), alternating with inner rows of four hairs, the 
two first of these rows of hairs being followed by a pair of 
inner hairs. A single hair is present on each coxa (epimeron) 
of the legs. Hairs on palp apparently exactly the same as in 
L. autumnailis. 
Length of body (not including capitulum) 430 p. 
Host. A few specimens from a chicken, Dallas, ‘Texas, 
24, vil. 1916, collected by H. P. Wood (U.S. Dept. of 
Acriculture). 
Schéngastia americana, sp. n. 
Scutum not so definite in shape as in the known species of 
