INVERTER HATP: ZOOLOGY. 35 



Order 8. Pedipalpi Cephalo-thorax of one piece. Abdomen 



broad and depressed, 11-12 jointed, witli- 

 ont antenuated post-abdomen, bnt in some 

 cases ending in a long filiform process. 

 Mandibles with single claw. Second 

 pair of appendages large and chelate. 

 Third pair feeler-like, extended like whip 

 lashes. Two pairs of respiratory cham- 

 bers on second and third abdominal seg- 

 ments, ic Phrynus. 



Order 4. Solpngidea Head distinct, thorax of three segments. 



abdomen cylindrical, lO-jointed — mandi- 

 bles chelate. Second pair of appendages 

 leg-like, not chelate. Tracheal respira- 

 tory system with stigmata on the first 

 thoracic segment and second and third 

 abdominal segments. Nocturnal animals 

 formd in sandy parts of the tropics- 

 bite poisonous, -j^ Solpuga. 



Order 5. Phalangida Entire body a shortened oval. Reduced 



abdomen closely applied to cephalo-tho- 

 rax, but distinct and consisting of six 

 segments. Mandibles chelate. Legs verj' 

 long and attenuated. Tracheal tubes 

 with one pair of stigmata between tho- 

 rax and abdomen. ^ PhnlangiuDi. 



Order (>. Araclinida Abdomen Vvathout segments, swollen and 



atta(?;hed to cej)halo-thorax by a stalk. 

 Mandibles ending in a simple claw with 

 poison gland. Second pair of appendages 

 leg-like — modified in male. 2-3 pairs of 

 spinnerets at end of abdomen. 1-2 pairs 

 of respiratory chambers situated on ab- 

 domen. These may be also connected 

 with a system of tracheal tubes. 

 ■^ Eijeira. 



