with the dorsal area of
the prosoma furnished with two shields, a larger in front covering the
anterior four somites, and a smaller behind covering the 5th and 6th
somites; the latter generally subdivided into a right and left
portion. There is also a pair of narrow tergal sclerites interposed
between the anterior and posterior shields. Eyes evanescent or absent.
Appendages of 2nd pair folding in a vertical plane, not chelate, the
claw long and movable. Post-anal sclerite short and undivided. No
distinct respiratory stigmata behind the sterna of the 1st and 2nd
somites of the opisthosoma.

Family--Hubbardiidae (_Schizomus_, _Hubbardia_) (figs. 57-59).

[Illustration: FIG. 57.--_Schizomus crassicaudatus_, one of the
Tartarid Pedipalpi. Ventral view of a female with the appendages cut
short near the base.

a, Prosternum of prosoma.
b, Metasternum of prosoma.
prae-gen, The prae-genital somite.
I opisth, First somite of the opisthosoma.
II opisth, Eleventh somite of the opisthosoma.
pa, Post-anal lobe of the female (compare the jointed filament in
_Thelyphonus_, fig. 54).

(Original drawing by Pickard-Cambridge, directed by Pocock.)]

[Illustration: FIG. 58.--_Schizomus crassicaudatus_, a Tartarid
Pedipalp. Dorsal view of a male with the appendages cut short.

I to VI. The prosomatic appendages.
a, Anterior plate.
b, Posterior plate of the prosomatic carapace.
prae-gen, Tergum of the prae-genital somite.
11, The eleventh somite of the opisthosoma.
pa, Post-anal lobe of the male--a conical body with narrow basal
stalk.

(Original as preceding.)]

Sub-order b. Amblypygi.--Prosoma wider than long, covered above by a
single shield bearing median and lateral eyes, which have
diplostichous ommatea. Sternal area broad, with prosternal, two
mesosternal, and metasternal plates, the prosternum projecting
forwards beneath the coxae of the 2nd pair of appendages. Appendages
of 2nd pair folding in a horizontal plane; their basal segments
freely movable; claw free or fused; basal segments of 4th and 5th
pairs widely separated by the sternal area; appendages of 3rd pair
with all the segments except the proximal three, forming a
many-jointed flagellum. Opisthosoma without post-anal sclerite and
posterior caudal elongation: with frequently a pair of small lobate
appendages on the sternum of the 3rd somite. Re