176 Haemaphysalts punctata 
margin of the buccal cavity immediately behind the hypostome, are of 
great thickness, giving increased strength to the anterior part of the 
basis capituli and firm support to the bases of the mouth appendages ; 
running through these thick walls, ventral to the buccal cavity, is a pair 
of narrow canals leading to the bases of a single pair of hairs situated on 
the base of the hypostome. Into the postero-internal angles of the 
buccal cavity the large cylindrical salivary ducts open (s.d.); these are 
readily recognised by the delicate trachea-like transverse striation of 
their walls. Opening on the floor of the buccal cavity at its posterior 
end is the pharynx, a longitudinally placed chitinous sac of peculiar 
shape, which extends backwards into the body-cavity, where it becomes 
suddenly constricted into the narrow oesophagus. The relation of these 
parts will be more perfectly understood by reference to the figure 
showing a schematised longitudinal section through the capitulum 
(Text Fig. 6, p. 170) 1 . 
II. The Capitulum of the Male. 
(Plate XIV, Figs. 8 and 4.) 
The capitulum of the male differs from that of the female in details 
only, but these are sufficient to necessitate a special description. The 
dorsal ridge of the basis capituli bears at either lateral extremity, 
a short backwardly directed process (cornua). The porose areas are 
absent, a few scattered pores of the ordinary type being present. 
The palps are shorter and wider in proportion to their length and 
more pointed at the apex. The number of hairs borne on the infra¬ 
internal margins of the second article of the palp is usually thirteen, 
three being carried on the third article, as in the female. The hypostome 
is narrower in proportion to its length and not so markedly spatulate: 
the teeth which beset its ventral surface are also more elongated and 
sharply pointed. The chelicerae agree in their general structure with 
those of the female, but the digit calls for special attention. The 
internal article is similar to that of the female; the external article is 
relatively smaller in comparison with the internal, and only bears three 
cusps on its external margin. The dorsal process is quite different from 
sion of these outlines is misleading, in the fact that they might be taken to represent 
external or superficial features. 
1 Nuttall, Cooper and Smedley (1905) described the details of the structure and 
relationship of the buccal cavity and pharynx ; it will be considered again in a future 
paper which will follow in this Journal. 
