Mello-Leitão — Pedipalpos do Brasil 
69 
PHANEROCTEWA — Possess 13 
abdominal segments; legs wit- 
hout patella a pair of abdomi 
nal appendices of comb shape; 
abdômen very long- with last 
five segments narrowed; telson 
present, globose with poíson 
glands; maxillar palps robust; 
tricffobothria only on the pal- 
pi; 4 pairs of lungs. 
Hapíocnemia Borner — Legs 
IV without patellas; tracheal 
respiration ; chelicera of 3 
segments. 
Scarpionidea With the cha- 
racteristics of the subclass. 
CheLONETiii Thor. — Tracheal 
stigmae only on abdômen. 
Cephalothorax entire. Legs 
IV without racquet-shaped 
organs. 
Salifugae Lundv — Tracheal 
stigmae on cephalothorax 
and abdômen. Cephalothorax 
segmented. Legs IV with 
racquet shaped organs. 
ADELOCTENA — At the most 
12 abdominal segments. Abdô¬ 
men without appendices. Lungs, 
at the most, two pairs. 
Ârthrothoracica n. — Cepha¬ 
lothorax divided. Patellae 
present in legs IV. Tracheal 
respiration. Telson present, 
plurisegmented. Chelicera tri- 
segmented. 
Orthopneumona n. — Legs (at 
least III and IV) witli pa¬ 
tella. One or two pairs of 
lungs ; abdômen separated 
from cephalothorax by a deep 
constriction. Chelicera bi-se- 
gmented. 
Holosomatica Poc. — Cepha¬ 
lothorax undivided Patellae 
generally present; tracheal 
respiration, with other tho- 
racíc or abdominal stigmae. 
Palpigradi Thoz. — With the 
characteristics of the Legioii. 
Pedipalpi Latr. — Abdômen 
clearly segmented; chelicera 
without poison glands. 
Araneae Lundv. — Abdômen 
undivided, only rarely with 
dorsal metameric plates; che¬ 
licera with poison glands. 
Meridogastra Th os, — Cepha- 
thorax separate from abdô¬ 
men; copulatory organs of 
male on legs III. Chelicera 
trisegmented. 
Opiliones Sundv. — Cephalo¬ 
thorax coalescing to part of 
abdômen. Chelicera triseg¬ 
mented. 
Acarina Nitzch — Cephalotho¬ 
rax entirely and broadly 
fused with the abdômen. 
Chelicera unisegmented. 
P 
