XV CLASSIFICATION 393 
The legs are nearly of equal length, and the posterior spinnerets 
have very long terminal joints. 
Fam. 6. Sicariidae (Scytodidae).— The Sicariidae are a small 
group of six-eyed spiders, usually with weak legs and slow halting 
movements; they live under stones or in outhouses. The 
cephalothorax is generally smooth and devoid of the median fovea, 
and the palpal organs of the male are extremely simple. The 
best known genus is Scytodes, one species of which (S. thoracica) 
has on rare occasions been found in outhouses in the south of 
England, in Dorsetshire, and Kent. This is a remarkable spider, 
about one-third of an inch long, with a pale yellow ground- 
colour, marked with black spots and patches. The cephalothorax 
is smooth and dome-shaped, and highest near the posterior end. 
All the other members of the family are exotic. Lowosceles is 
found in the Mediterranean region and all over America, as well 
as in Japan. The median fovea is present in this genus. Sicarius 
is a native of America and South Africa. It is of stouter build 
than Scytodes, and the legs are stronger. Drymusa belongs to 
South Africa. The peculiar New Zealand species Periegops hirsutus 
is placed by Simon in this family, as is also the North American 
genus Plectreurys, notwithstanding its possession of eight eyes. 
Fam. 7. Hypochilidae—Two species only are included in 
this family, Hypochilus thorelli of North America, and Ectatosticta 
davidi, a native of China. They have four pulmonary sacs, 
though they possess little else in common with the “ Thera- 
phosae.” The pedipalpus of the male is very remarkable, the 
tarsus being almost unmodified, and the very small palpal organ 
being inserted at its extremity. These spiders are cribellate. 
Fam. 8. Leptonetidae.—The Leptonetidae are small spiders 
with smooth and usually dull-coloured integuments. Most of 
them are cave-living, but some are found amidst vegetable débris 
in damp spots in forests. The eyes are six in number, and the 
legs are generally long and thin. There are five genera. Leptoneta 
has about ten species living in caves in the Pyrenees, The 
single species of Z'elema (7. tenella) has the same habitat. Ochy- 
rocera has representatives in tropical Asia and America, and is 
somewhat more ornate than most members of the eroup.  Usofila 
has a single species, inhabiting North America, while 7heotina is 
found in caves in the Philippines and in Venezuela. 
Fam. 9. Oonopidae.—The Oonopidae are very small spiders, 
