100 ARTHROPODA. 



Order V. PHALANGIDEA. 

 OPILIONINA. 



Abdomen segmented, indistinctly separated from the cephalo- 

 thorax. Maxillary palpi filiform, with a single claw. Eyes two. 

 Respiration by tracheae. 



Unlike spiders, they hare no poison -gland or spinning-organs ; 

 and it is difficult to tell the males from the females, except from 

 the greater length of the maxillary palpi ; but the latter have 

 an ovipositor. The young have the same form as the adult. 

 Dolichoscelis Haworthii has legs 25 times longer than the body. 

 The Phalangidea are very voracious and destroy one another. 

 The British species are sometimes called " harvest-spiders ; " they 

 all, with one rare exception, belong to the family Phalahgiidte, 

 Unlike spiders, they die, so far as is known, at the end of the 

 autumn. 



Siro has the eyes widely apart, each placed on a peduncle. 



Cryptostemmidce. Scotoleraon. Ischyropsalis. 



Crypfcostemma. Gonyleptes. Discosoina. 



Stygnus. Leiobunum. 



Sironidts. EusarcuB. Opilio. 



Siro = Cvphophthal- 



Trogulus. 



Cosmetidce. 



Gonyleptidce. Phalanmida. 



Goniosoma. Eg*nus. Cosinetus. 



Order VI. PHKOIDEA. 



Abdomen segmented, distinct from the cephalothorax, with or 

 without a seta or style at the end. Palpi long, leg-shaped, mono- 

 or didactyle. Anterior pair of legs simulating antenna. 



There are 4-8 pulmonary sacs. The ocelli (or eyes) are ordi- 

 narily eight ; none, however, in Nyctalops. 



In Phrynidae the abdomen is rounded and mutic, and the 

 maxillary palpi are armed with a single claw. In Thelyphonid-v 

 the maxillary palpi are didactyle, and the abdomen is furnished 

 with a jointed setiform appendage. 



These Arachnids are all tropical, living under stones and in 

 damp places ; they are not venomous. Latreille combined them 



