334 TWO SPECIES OF PARASITIC MITES. 
cone-shaped cap of chitin supporting the terminal processes. The 
two anterior legs on each side bear at the extremity of this latter 
joint four curved hook-like claws, and a relatively large bell-shaped 
sucker on a stem which, though long, is much shorter than in 8. 
scabiei. In the female the posterior legs are terminated by long 
flexible bristles in place of suckers. In the male the third leg only 
ends in a bristle, the fourth bearing a long-handled sucker very much 
like that on the first and second legs. The legs articulate with and 
are supported by the epimera, which are light brown chitinous bands 
present in the walls of the body and extending in a general way along 
the ventral surface from the points of insertion of the legs towards 
the median line. Those of the front pair of legs run backwards and 
inwards, and, a short distance behind the rostrum, unite to form an 
elongated Y-shaped figure. The arms of the Y, however, are 
bifurcated, the anterior branch running forward to support the 
palps, the posterior articulating with the first leg. The second 
epimere also runs backwards and inwards for a_ considerable 
distance, but before reaching the median line it takes a sharp 
turn outwards and terminates abruptly. The third and fourth 
epimera in the female are short and slender, running forwards 
and inwards, and bending towards each other at their anterior 
ends. In the male the arrangement is more complicated; the 
third and fourth epimera run forwards and inwards joining the 
anterior portion of the sternite, a median chitinous band which runs 
backwards along the posterior portion of the ventral surface, thus 
enclosing the male sexual organs under a sort of double arch, the 
keystones of which are prolonged until they meet each other. 
The external sexual organs in the male are situated between the 
points of insertion of the fourth pair of legs, and are composed 
essentially of the three following parts: (1) the sternite, composed of 
a chitinous band on each side of the sexual opening, which runs 
forward and joins the one from the opposite side in front of the 
Opening and becomes continuous with the median chitinous strip 
mentioned above; (2) a lid or hyposternum, made up of two arched 
bands and a connecting membrane, thus forming a triangular cover 
hinged to the sternite at its postero-lateral angles, and with the 
point directed forwards; and (3) a penis, which, when prone, is 
directed forwards under the episternum and may be seen through 
