28 NOTES ON MILLIPEDES. 



breathing by means of 4 pairs ot lung books, 

 abdominal combs present, 

 no silk-secreting glands, 

 some species attain a length of 8 inches. 

 (Scorpions). Order Scorpion es. 



b. no tail. 



breathing by means of air-tubes, 

 no abdominal combs, 

 silk-secreting glands present, 

 some species attain a length of \ inch. 



(False Scorpions). Order Pseudoscoipioiies. 



B. a " waist" between cephalothorax and abdomen. 



ord pair of limbs modified into feelers, the last segment 



being clawless and divided into a number of secondary 



segments. 



4th, 5 tli and 6th pairs of similar construction and used 



for walking. 



c. no tail, or a thread like one. 



breathing by means of 2 pairs of lung books. 



no abdominal combs. 



no silk -secreting glands. 



some species attain a length ot 2 inches. 



( Whip Scorpions) Order Pedipalpi. 



B. 2nd pair of limbs not modified into cheloe, 

 C. cephalothorax segmented. 



mandibles form large pincers, 

 abdomen with ten segments, 

 palpi leg- like. 



d. a long jointed tail. 



size minute: only one species known, from South 

 Europe. 



Order Palpigradi. 



e. no tail. 



reach nearly 2 inches in length ; many genera and 

 species known from South Europe, Africa. Asia and 

 America. 



