abdomen is oviform, glossy, sparingly clothed with hairs, moderately convex above, projecting
over the base of the cephalo-thorax, and has a brown-black hue, that of the branchial opercula
and spinners being yellowish-white.
This species, which is closely allied to Walckenaera cuspidata and Walckenaera monoceros,
was taken at Lyndhurst, by the Rev. O. P. Cambridge, in the summer of 1860.
Walckenaera obtusa. PI. XX, fig. 208.
Walckenaera obtusa, Blackw., Lond. and Edinb. Phil. Mag., third series, vol. viii,
p. 482.
— — Blackw., Annals and Mag. of Nat. Hist., second series, vol. ix,
p. 273.
Length of the male, }th of an inch; length of the cephalo-thorax, ^th, breadth, ^ th ;
breadth of the abdomen, ^th; length of an anterior leg, £ths; length of a leg of the third
pair, £th.
The cephalo-thorax is oval, convex, glossy, with a slight indentation in the medial line,
and the sternum is oblong heart-shaped. These parts, with the falces, maxillae, and lip, have
a dark,brownish-black hue. The legs are hairy, and have a bright-rufous tint; the two
superior tarsal claws are curved and pectinated, and the inferior one is inflected near its base.
The palpi resemble the legs in colour; the cubital joint is clavate, and the radial joint, which
is short, terminates in three apophyses; the largest curves outwards before the digital joint,
the next in size is exterior to this, and has a small, pointed process at its base, in front, and
the smallest is situated underneath; the digital joint is somewhat oval, convex and hairy
externally, concave within, comprising the palpal organs, which are highly developed, complicated
in structure, with a strong spine on the outer side, curved in a circular form, and are of
a brownish-black colour, tinged with red. The abdomen is oviform, convex above, and projects
over the base of the cephalo-thorax; it is sparingly clothed with hairs, glossy, and of a
deep-black hue.
A few males of Walckenaera obtusa, in a state of maturity, were discovered under stones
at Oakland in February, 1835. Between the male of this species and the male of Walckenaera
cuspidata there is a striking resemblance; but the smaller size of the latter, the comparative
shortness of its sternum, differences in the structure of its palpi, and especially the acute,
conical prominence situated within the trapezoid formed by the four intermediate eyes, effectually
serve to distinguish it from the former.
W a l c k e n a ë r a f u s c i p e s . PI. XX, fig . 2 0 9 .
Walckenaera fuscipes, Bla ckw ., L o n d . a n d E d in b . P h il. M ag ., th ird series, vol. viii,
p. 481.
' —^ — B lackw., A n n a ls an d M ag . o f N a t. H is t., second serie s, vol. ix,
p. 273.
Length of the male, ^th of an inch; length of the cephalo-thorax, ^th, breadth, ^th;
breadth of the abdomen, ^nd ; length of an anterior leg, ^th ; length of a leg o f the third
pair, -nrth.
The cephalo-thorax is oval, convex, glossy, with a slight indentation in the medial line ;
the anterior part, which is prominent and acute, is compressed, and deeply indented on the
sides, and has a slight indentation above ; in front it is divided into two segments by a transverse
groove; the falces are conical, armed with teeth on the inner surface, and inclined
towards the sternum, which is broad and heart-shaped ; the legs are provided with hairs ; the
two superior tarsal claws are curved and pectinated, and the inferior one is inflected near its
base. These parts, with the maxillæ and lip, are of a brown colour. The eyes are distributed
in pairs on the anterior prominence of the cephalo-thorax ; one pair is situated on the summit
of its-superior segment, and another on a small protuberance on the upper part of the inferior
segment, in front ; these eyes describe a narrow trapezoid, whose anterior side is the shortest ;
the two other pairs are seated on the sides of the frontal prominence, and the eyes constituting
each are contiguous. The palpi have a brown tint, the radial and digital joints being much
the darkest ; the radial joint terminates in two apophyses ; one, which is large, depressed, and
hairy, overlaps the base of the digital joint, and the other, which is small, projects on the inner
side ; the digital joint is oval, convex and hairy externally, concave within, comprising the
palpal organs, which are highly developed, not very complex in structure, and of a brown
colour, tinged with red. The abdomen is oviform, convex above, and projects over the base
of the cephalo-thorax ; it is thinly clothed with hairs, glossy, and of a brownish-black hue ;
that of the branchial opercula being pale-yellow.
Adult males of this species were found under stones at Oakland, in March, 1835.
Walckenaera punctata. PI. XX, fig. 210.
Walckenaera punctata, Blackw., Linn. Trans., vol. xviii, p. 629.
— Blackw., Annals and Mag. of Nat. Hist., second series, vol. ix,
p. 274.
Argus trapezoides, "Walck., Hist. Nat. des Insect. Apt., tom. iv, p. 503.
Length of the female, ^th of an inch ; length of the cephalo-thorax, ^th, breadth, ^th ;
39