ARANEIDA. 821 



crowded together; chelicerae small; integument with few hairs; two 

 pulmonary sacs and two minute widely separated trachea! stigmata just 

 behind them ; legs of male long and slender. The single genus Filistata 

 includes some 15 species widely distributed, a few are Mediterranean. 



Section II. ECRIBELLATAE. 



No cribellum or calarnistrum. 



Fam. 12. Sicariidae (Scytodidae). Eyes six ; legs longish and slender ; 

 spinnerets small and crowded together ; integument smooth ; palpal organ 

 in male simple. This family lives in outhouses and under debris. Plec- 

 treurys American, Periegops New Zealand, Sicarius Africa and America, 

 Loxosceles and Scytodes widely distributed, the latter has one species S. 

 thoracica which has occasionally been found in the South of England, 

 Drymusa Africa. 



Fam. 13. Leptonetidae. Cephalothorax short and rounded, large ; 

 eyes absent or 6 small ones ; chelicerae long and attenuated ; legs usually 

 long and slender ; spinnerets nearly equal in size. Small spiders with 

 long legs : inhabitants of caves and caverns or vegetable refuse in forests. 

 Leptoneta Europe, Africa and Japan, Telema caves in the Pyrenees, Psilo- 

 derces Luzon, Usofila America, Ochyrocera Asia and America, Theotima 

 Philippines and Venezuela. 



Fam. 14. Oonopidae. Cephalothorax shortly ovate ; six eyes closely 

 packed occupy almost all of the breadth of cephalic area ; chelicerae 

 conical ; sternum well developed : legs moderate and usually equal in 

 length ; sexes the same size. There are very small spiders varying in 

 length from 2-3 mm., they live in dry vegetable detritus, they run rapidly. 

 There are 19 genera. Orchestina and Oonops are widely distributed. 

 O. pulcher a small red-brick spider found in ditches represents the family 

 in the United Kingdom. Scaphietta West Indies and Venezuela, Epectris 

 Philippines. 



Fam. 15. Hadrotarsidae. Eight eyes, two large ones central and 

 three small ones in a row on each side in front ; chelicerae small and feeble ; 

 sternum very large ; 4 spinnerets ; legs very short. Minute spiders with 

 but 2 species Hadrotarsus babirussa found on an island near New Guinea 

 and Gmoqala scarabaeus found near Sydney. 



Fam. 16. Dysderidae. Cephalothorax oval sometimes elongate ; eyes 

 six ; chelicerae robust ; abdomen elongate almost cylindrical ; spinnerets 

 short ; palpal organ of male simple ; integument smooth. This family 

 has 2 sub-families : (i) Dysderinae in which the sternum is produced upwards 

 between the legs towards the carapace. Rhode Mediterranean, Harpassa 

 and Holissus Corsican, Harpactes and Dysdera have British species, Tedia 

 Syrian, Stalita in caves in Dalmatia, and Orsolobus American, (ii) Segestri- 

 inae, with 2 genera, Segestria represented in England and Ariadna widely 

 distributed and the only genus of this family which frequents the Tropics. 



Fam. 17. Caponiidae. Cephalothorax oval ; legs short ; the spinnerets 

 are arranged in two lines, the median being pushed forward and lying 

 between the anterior ; no pulmonary sacs, these structures being replaced 

 by tracheae. 3 genera, Nops and Caponina Central and South America, 

 West Indian Islands, and Caponia, Africa. 



Fam. 18. Prodidomidae. Eyes eight, the 4 anterior in a straight line ; 

 chelicerae very robust ; legs short ; abdomen oval and elongate. Small 



