Bd. V: ii) 
THE A CARI. 
19 
The projection of T. villosus T RT. is developed into a large plate and covers 
nearly the proximal half of the mandibles. 
Allthough both species bear a great resemblance in these respects yet they 
cannot be refered to the same genus on account of the entirely different shape 
of the epirostral plate and structure of the cuticle and the céphalothorax being 
distinctly^ - separated from the -abdomen in T. villosus. 
The genus Tectopenthalod.es is most closely related to Stereotydeus Berl. & 
Leon. [15, p. 14 — 15] described from South America, which has however 5-jointed 
palpi. 
8. Tectopenthalodes villosus Trt. 
1903. Penthaleus villosus Trouessart [ii, p. 6]. 
(PI. I, figs. 9 & 10, PI. II, figs. 3, 4 & 7, text-fig. 31.) 
My specimens agree wholly with T.’s type specimens, which I have been able 
to examine. 
The following additions and corrections are to be made in T.’s description. 
Texture. If the mite is macerated in caustic potash we notice that the exceed- 
ingly minute velvet hairs are arranged in polygonal areas, divided by low, bare 
ridges (PI. I, fig. 10). 
The epirostral plate which covers the base of the rostrum is three-lobated , 
not bi-lob a ted as stated by TROUESSART (PI. II, fig. 4); the plate is sculptured 
by small, semi-spherical projections; the lateral lobes are subquadrangular with 
fine hairy, slightly undulating edges; the median lobe is rounded and smooth, 
only clothed with velvet hairs. At the base of the median lobe is a small trans- 
verse oval area, where the cuticle is smooth; on this area a pair of small hairs is 
situated. 
The maxillary palps (PI. II, fig. 7); the second joint is broader with more 
convex dorsal edge than is shown in T.’s figure; the last joint is obliquely truncated 
at the end; the posterior dorsal hair is, even in T.’s specimens, situated further 
forward, at the middle of the joint, and the anterior dorsal hair of the 3rd joint is 
situated close to the front edge of the joint. 
The mandibles (PI. II, fig. 3) bear a great resemblance to those of Halotydens 
hydrodromus Berl. & Trt [i. Fasc. LX. No 10. Tab. 32. fig. 3]; the lower jaw 
of the chela with broad proximal half and narrow, curved and pointed end, the 
dorsal edge without teeth. The upper jaw is flattened or even slightly concave 
at the outer side, lanceolate; the ventral edge is convex and smooth; the dorsal 
one with one tooth near the end; one curved hair, behind the chela, on the dorsal 
side. 
