PHALANGIDEA. 



841 



Sub-order 1. CYPHOPHTHALMI. 



First sternal plate of abdomen small and leaving genital orifice exposed. 

 Ten tergal and nine sternal plates in abdomen. 2 or 4 marginal eyes on 

 pedicels ; the anterior abdominal segment does not extend in front of the 

 coxae of last legs ; sternum of prosoma long and narrow ; two or four 

 stigmata. 



Fam. 1. Sironidae. Sternum long and very narrow, two eyes and 

 two stigmata. Siro with two species, France and Corsica ; Cypho- 

 phthalmus southern Europe ; Stylocellus Sumatra and Petrallus Ceylon. 



(Fam. 2. Gibocellidae, with 4 eyes and 4 stigmata, are represented by 

 a single species Gibocellum sudeticum from Bohemia. There is some doubt 

 if this animal really exists.) 



(Sub-order 2. MEGOSTETHI. 



The three last segments of the abdomen remain free ; the coxae of the 

 posterior legs are fused with the first abdominal sternum, but the remaining 

 abdominal sterna are free ; eyes usually borne on a frontal ridge ; sternum 

 -of prosoma long and narrow ; the anterior four legs bear one claw, the 

 posterior four two claws each. 



FIG. 553. Phalanjium copticum Sav. Natural size and magnified. 



Fam. 1. Phalangodidae. Body wedge-shaped, broadest behind ; 

 the posterior abdominal sternum is the largest ; sternum of prosoma 

 -almost linear ; coxae all immovable ; stigmata concealed. This family 



