Two new Spiders from Demerara. 141 
Carapace high, heart-shaped, longer than broad, its length 
about equal to the length of the femur of the first leg; width 
equal to length of tibiavof third leg. 
Ocular area transversely elongate, much wider than long, 
anterior median eyes about half the size of the rest, which 
are subequal ; eyes of anterior row viewed from above rather 
strongly recurved, when viewed from the front about straight, 
the distances between the individual eyes narrow and about 
equal to the radius of a median eye ; eyes of the posterior row 
slightly procurved, the space between the median nearly equal 
to their diameter, space between median and lateral rather 
greater; all the eyes are round, the anterior median being 
dark-colouredy the rest pale. Clypeus about equal to twice 
the diameter of the anterior median eye. 
Mandibles long and strong, narrowed, diverging a little 
distally ; edges of the groove upon which the fang closes 
toothed, the posterior edge with 6 small teeth, the anterior 
with 5 much larger teeth ; if front of the latter and extending 
to the base of the fang is a cluster of long sete. 
Labium more than twice as wide as long, a little narrowed 
distally, with lightly emarginate anterior border. 
Mazxille surpassing the labium’ by more than a third of 
their length, rectangularly pointed at the apex, the inner edge 
of the apex straight and strongly hairy, the outer convex and 
bearing a strong serrula. 
Legs 1, 2 and 4, 3 with robust femora and very slender 
protarsi and tarsi; femora 1 and 2 armed above with 9 long 
filiform spines, 3 and 4 with 7; unarmed below; tibiae with 
12 long spines below and at the sides; patella armed with 
1 posterior spine; protarsi with many spines, intermixed 
with hairs ; tarsi not spined, thickly hairy below, the ungual 
tufts conspicuous ; claws furnished with 5 (? more) very long 
and strong teeth. 
Palpi with femur bowed, armed above with 4 spines ; patella 
armed above with about 3 spines; tibia excelling the patella 
by about one third of its length, armed with 3 long spines 
above; its lower surface furnished distally with two pro- 
cesses—a smaller simple conical internal one and a large 
bifid laminate external one; on the proximal side of these a 
deep smooth depression or notch; tarsus oval, far surpassing 
the bulb, for structure of which see figure (p. 142). 
Distance between the tracheal slit and the spinners more 
than three times as great as the distance between the tracheal 
slit and the generative orifice. 
Anterior mammille much thicker and a little shorter than 
the posterior. 
